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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
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+{
+    [SerializeField]
+    private UniWebView m_UniWebView;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        m_UniWebView.SetBackButtonEnabled(false);// 回退钮  物理按键
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Assets/UniWebView/Demo/UniWebViewDemo.unity.meta

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Assets/UniWebView/Editor.meta

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Assets/UniWebView/Editor/AndroidManifest.cs

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+using System.Xml;
+using System.Text;
+using System;
+using UnityEngine;
+
+internal class UniWebViewAndroidXmlDocument : XmlDocument {
+    private readonly string path;
+    protected readonly XmlNamespaceManager nameSpaceManager;
+    protected const string AndroidXmlNamespace = "http://schemas.android.com/apk/res/android";
+
+    protected UniWebViewAndroidXmlDocument(string path) {
+        this.path = path;
+        using (var reader = new XmlTextReader(path)) {
+            reader.Read();
+            Load(reader);
+        }
+        nameSpaceManager = new XmlNamespaceManager(NameTable);
+        nameSpaceManager.AddNamespace("android", AndroidXmlNamespace);
+    }
+
+    public void Save() {
+        SaveAs(path);
+    }
+
+    private void SaveAs(string path)
+    {
+        using var writer = new XmlTextWriter(path, new UTF8Encoding(false));
+        writer.Formatting = Formatting.Indented;
+        Save(writer);
+    }
+}
+
+internal class UniWebViewAndroidManifest : UniWebViewAndroidXmlDocument {
+    private readonly XmlElement manifestElement;
+    private readonly XmlElement applicationElement;
+
+    public UniWebViewAndroidManifest(string path) : base(path) {
+        manifestElement = SelectSingleNode("/manifest") as XmlElement;
+        applicationElement = SelectSingleNode("/manifest/application") as XmlElement;
+    }
+
+    private XmlAttribute CreateAndroidAttribute(string key, string value) {
+        XmlAttribute attr = CreateAttribute("android", key, AndroidXmlNamespace);
+        attr.Value = value;
+        return attr;
+    }
+
+    internal XmlNode GetActivityWithLaunchIntent() {
+        return
+            SelectSingleNode(
+                "/manifest/application/activity[intent-filter/action/@android:name='android.intent.action.MAIN' and "
+                + "intent-filter/category/@android:name='android.intent.category.LAUNCHER']",
+                nameSpaceManager);
+    }
+
+    internal bool SetUsesCleartextTraffic() {
+        var changed = false;
+        if (applicationElement.GetAttribute("usesCleartextTraffic", AndroidXmlNamespace) != "true") {
+            applicationElement.SetAttribute("usesCleartextTraffic", AndroidXmlNamespace, "true");
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool SetHardwareAccelerated() {
+        var changed = false;
+        var activity = GetActivityWithLaunchIntent() as XmlElement;
+        if (activity == null)
+        {
+            Debug.LogError(
+                "There is no launch intent activity in the AndroidManifest.xml." +
+                " Please check your AndroidManifest.xml file and make sure it has a main activity with intent filter");
+            return false;
+        }
+        if (activity.GetAttribute("hardwareAccelerated", AndroidXmlNamespace) != "true") {
+            activity.SetAttribute("hardwareAccelerated", AndroidXmlNamespace, "true");
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddCameraPermission() {
+        var changed = false;
+        var cameraPermission = "/manifest/uses-permission[@android:name='android.permission.CAMERA']";
+        var cameraPermissionNode = SelectNodes(cameraPermission, nameSpaceManager);
+        if (cameraPermissionNode == null || cameraPermissionNode.Count == 0) {
+            var elem = CreateElement("uses-permission");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.permission.CAMERA"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        
+        var hardwareCamera = "/manifest/uses-feature[@android:name='android.hardware.camera']";
+        var hardwareCameraNode = SelectNodes(hardwareCamera, nameSpaceManager);
+        if (hardwareCameraNode == null || hardwareCameraNode.Count == 0) {
+            var elem = CreateElement("uses-feature");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.hardware.camera"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddMicrophonePermission() {
+        bool changed = false;
+        var microphonePermission = "/manifest/uses-permission[@android:name='android.permission.MICROPHONE']";
+        var microphonePermissionNode = SelectNodes(microphonePermission, nameSpaceManager);
+        if (microphonePermissionNode == null || microphonePermissionNode.Count == 0) {
+            var elem = CreateElement("uses-permission");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.permission.MICROPHONE"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        
+        var microphoneHardware = "/manifest/uses-feature[@android:name='android.hardware.microphone']";
+        var microphoneHardwareNode = SelectNodes(microphoneHardware, nameSpaceManager);
+        if (microphoneHardwareNode == null || microphoneHardwareNode.Count == 0) {
+            var elem = CreateElement("uses-feature");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.hardware.microphone"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddReadExternalStoragePermission() {
+        var changed = false;
+        var externalPermission = "/manifest/uses-permission[@android:name='android.permission.READ_EXTERNAL_STORAGE']";
+        var externalNode = SelectNodes(externalPermission, nameSpaceManager);
+        if (externalNode == null || externalNode.Count == 0) {
+            var elem = CreateElement("uses-permission");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.permission.READ_EXTERNAL_STORAGE"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddWriteExternalStoragePermission() {
+        var changed = false;
+        var externalPermission = "/manifest/uses-permission[@android:name='android.permission.WRITE_EXTERNAL_STORAGE']";
+        var externalNode = SelectNodes(externalPermission, nameSpaceManager);
+        if (externalNode == null || externalNode.Count == 0) {
+            var elem = CreateElement("uses-permission");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.permission.WRITE_EXTERNAL_STORAGE"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddAccessFineLocationPermission() {
+        var changed = false;
+        var locationPermission = "/manifest/uses-permission[@android:name='android.permission.ACCESS_FINE_LOCATION']";
+        var locationNode = SelectNodes(locationPermission, nameSpaceManager);
+        if (locationNode == null || locationNode.Count == 0) {
+            var elem = CreateElement("uses-permission");
+            elem.Attributes.Append(CreateAndroidAttribute("name", "android.permission.ACCESS_FINE_LOCATION"));
+            manifestElement.AppendChild(elem);
+            changed = true;
+        }
+        return changed;
+    }
+
+    internal bool AddAuthCallbacksIntentFilter(string[] authCallbackUrls) {
+        var changed = false;
+        XmlElement authActivityNode;
+        if (authCallbackUrls.Length > 0) {
+            var authActivity = "/manifest/application/activity[@android:name='com.onevcat.uniwebview.UniWebViewAuthenticationActivity']";
+            var list = SelectNodes(authActivity, nameSpaceManager);
+            if (list == null || list.Count == 0) {
+                var created = CreateElement("activity");
+                created.SetAttribute("name", AndroidXmlNamespace, "com.onevcat.uniwebview.UniWebViewAuthenticationActivity");
+                created.SetAttribute("exported", AndroidXmlNamespace, "true");
+                created.SetAttribute("launchMode", AndroidXmlNamespace, "singleTask");
+                created.SetAttribute("configChanges", AndroidXmlNamespace, "orientation|screenSize|keyboardHidden");
+                authActivityNode = created;
+            } else {
+                authActivityNode = list[0] as XmlElement;
+            }
+        } else {
+            return false;
+        }
+
+        foreach (var url in authCallbackUrls) {
+            var intentFilter = CreateIntentFilter(url);
+            if (intentFilter != null) {
+                authActivityNode?.AppendChild(intentFilter);
+                changed = true;
+            }
+        }
+
+        if (authActivityNode != null) {
+            applicationElement.AppendChild(authActivityNode);
+        }
+        return changed;
+    }
+
+    private XmlElement CreateIntentFilter(string url) {
+        
+        var uri = new Uri(url);
+        var scheme = uri.Scheme;
+        if (string.IsNullOrEmpty(scheme)) {
+            Debug.LogError("<UniWebView> Auth callback url contains an empty scheme. Please check the url: " + url);
+            return null;
+        }
+
+        var filter = CreateElement("intent-filter");
+        
+        var action = CreateElement("action");
+        action.SetAttribute("name", AndroidXmlNamespace, "android.intent.action.VIEW");
+        filter.AppendChild(action);
+        
+        var defaultCategory = CreateElement("category");
+        defaultCategory.SetAttribute("name", AndroidXmlNamespace, "android.intent.category.DEFAULT");
+        filter.AppendChild(defaultCategory);
+        
+        var browseCategory = CreateElement("category");
+        browseCategory.SetAttribute("name", AndroidXmlNamespace, "android.intent.category.BROWSABLE");
+        filter.AppendChild(browseCategory);
+        
+        var data = CreateElement("data");
+        data.SetAttribute("scheme", AndroidXmlNamespace, scheme);
+        if (!String.IsNullOrEmpty(uri.Host)) {
+            data.SetAttribute("host", AndroidXmlNamespace, uri.Host);
+        }
+        if (uri.Port != -1) {
+            data.SetAttribute("port", AndroidXmlNamespace, uri.Port.ToString());
+        }
+        if (!string.IsNullOrEmpty(uri.PathAndQuery) && uri.PathAndQuery != "/") {
+            data.SetAttribute("path", AndroidXmlNamespace, uri.PathAndQuery);
+        }
+        
+        filter.AppendChild(data);
+        return filter;
+    }
+}

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Assets/UniWebView/Editor/BuildGradle.cs

@@ -0,0 +1,346 @@
+using System.Collections.Generic;
+using UnityEngine;
+using System.IO;
+using System.Text;
+using System;
+
+public class UniWebViewGradleConfig
+{
+    private readonly string m_filePath;
+
+    public UniWebViewGradleNode Root { get; }
+
+    public UniWebViewGradleConfig(string filePath)
+    {
+        var file = File.ReadAllText(filePath);
+        TextReader reader = new StringReader(file);
+
+        m_filePath = filePath;
+        Root = new UniWebViewGradleNode("root");
+        var curNode = Root;
+
+        var str = new StringBuilder();
+        var inDoubleQuote = false;
+        var inSingleQuote = false;
+        var inDollarVariable = false;
+
+        while (reader.Peek() > 0)
+        {
+            char c = (char)reader.Read();
+            switch (c)
+            {
+                // case '/':
+                //     if (reader.Peek() == '/')
+                //     {
+                //         reader.Read();
+                //         string comment = reader.ReadLine();
+                //         Debug.Log("Comment line: " + comment);
+                //         curNode.AppendChildNode(new UniWebViewGradleCommentNode(comment, curNode));
+                //     }
+                //     else
+                //     {
+                //         str.Append('/');
+                //     }
+                //     break;
+                case '\n':
+                case '\r':
+                    {
+                        var strf = FormatStr(str);
+                        if (!string.IsNullOrEmpty(strf))
+                        {
+                            curNode.AppendChildNode(new UniWebViewGradleContentNode(strf, curNode));
+                        }
+                    }
+                    inDollarVariable = false;
+                    str = new StringBuilder();
+                    break;
+                case '\t':
+                    {
+                        var strf = FormatStr(str);
+                        if (!string.IsNullOrEmpty(strf))
+                        {
+                            str.Append(" ");
+                        }
+                        break;
+                    }
+                case '{':
+                    {
+                        if (inDoubleQuote || inSingleQuote) {
+                            str.Append(c);
+                            break;
+                        }
+                        var n = FormatStr(str);
+                        if (!string.IsNullOrEmpty(n))
+                        {
+                            UniWebViewGradleNode node = new UniWebViewGradleNode(n, curNode);
+                            curNode.AppendChildNode(node);
+                            curNode = node;
+                        }
+                    }
+                    str = new StringBuilder();
+                    break;
+                case '}':
+                    {
+                        if (inDoubleQuote || inSingleQuote) {
+                            str.Append(c);
+                            break;
+                        }
+                        var strf = FormatStr(str);
+                        if (!string.IsNullOrEmpty(strf))
+                        {
+                            curNode.AppendChildNode(new UniWebViewGradleContentNode(strf, curNode));
+                        }
+                        curNode = curNode.Parent;
+                    }
+                    str = new StringBuilder();
+                    break;
+                case '\"':
+                    if (inDollarVariable) {
+                        str.Append(c);
+                        break;
+                    }
+                    inDoubleQuote = !inDoubleQuote;
+                    str.Append(c);
+                    break;
+                case '\'':
+                    if (inDollarVariable) {
+                        str.Append(c);
+                        break;
+                    }
+                    inSingleQuote = !inSingleQuote;
+                    str.Append(c);
+                    break;
+                case '$': 
+                    {
+                        if (inDoubleQuote || inSingleQuote) {
+                            str.Append(c);
+                            break;
+                        }
+                        inDollarVariable = true;
+                        str.Append(c);
+                        break;
+                    }
+                default:
+                    str.Append(c);
+                    break;
+            }
+        }
+
+        // End of file.
+        var endline = FormatStr(str);
+        if (!string.IsNullOrEmpty(endline))
+        {
+            curNode.AppendChildNode(new UniWebViewGradleContentNode(endline, curNode));
+        }
+        //Debug.Log("Gradle parse done!");
+    }
+
+    public void Save(string path = null)
+    {
+        if (path == null) {
+            path = m_filePath;
+        }
+            
+        File.WriteAllText(path, Print());
+    }
+
+    private static string FormatStr(StringBuilder sb)
+    {
+        var str = sb.ToString();
+        str = str.Trim();
+        return str;
+    }
+    public string Print()
+    {
+        StringBuilder sb = new StringBuilder();
+        PrintNode(sb, Root, -1);
+        // Remove the first empty line.
+        sb.Remove(0, 1);
+        return sb.ToString();
+    }
+    private string GetLevelIndent(int level)
+    {
+        if (level <= 0) return "";
+        StringBuilder sb = new StringBuilder("");
+        for (int i = 0; i < level; i++)
+        {
+            sb.Append('\t');
+        }
+        return sb.ToString();
+    }
+    private void PrintNode(StringBuilder stringBuilder, UniWebViewGradleNode node, int level)
+    {
+        if (node.Parent != null) {
+            if (node is UniWebViewGradleCommentNode)
+            {
+                stringBuilder.Append("\n" + GetLevelIndent(level) + @"//" + node.Name);
+            }
+            else
+            {
+                stringBuilder.Append("\n" + GetLevelIndent(level) + node.Name);
+            }
+
+        }
+
+        if (node is UniWebViewGradleContentNode || node is UniWebViewGradleCommentNode) return;
+        if (node.Parent != null)  {
+            stringBuilder.Append(" {");
+        }
+        foreach (var c in node.Children) {
+            PrintNode(stringBuilder, c, level + 1);
+        }
+        if (node.Parent != null) {
+            stringBuilder.Append("\n" + GetLevelIndent(level) + "}");
+        }
+    }
+}
+
+public class UniWebViewGradleNode
+{
+    protected string m_name;
+    public UniWebViewGradleNode Parent { get; private set; }
+
+    public string Name => m_name;
+
+    public List<UniWebViewGradleNode> Children { get; private set; } = new List<UniWebViewGradleNode>();
+
+    public UniWebViewGradleNode(string name, UniWebViewGradleNode parent = null)
+    {
+        Parent = parent;
+        m_name = name;
+    }
+
+    public void Each(Action<UniWebViewGradleNode> f)
+    {
+        f(this);
+        foreach (var n in Children)
+        {
+            n.Each(f);
+        }
+    }
+
+    public void AppendChildNode(UniWebViewGradleNode node)
+    {
+        if (Children == null) Children = new List<UniWebViewGradleNode>();
+        Children.Add(node);
+        node.Parent = this;
+    }
+
+    public UniWebViewGradleNode TryGetNode(string path)
+    {
+        var subpath = path.Split('/');
+        var cnode = this;
+        foreach (var p in subpath)
+        {
+            if (string.IsNullOrEmpty(p)) continue;
+            var tnode = cnode.FindChildNodeByName(p);
+            if (tnode == null)
+            {
+                Debug.Log("Can't find Node:" + p);
+                return null;
+            }
+
+            cnode = tnode;
+        }
+
+        return cnode;
+    }
+
+    public UniWebViewGradleNode FindChildNodeByName(string name)
+    {
+        foreach (var n in Children)
+        {
+            if (n is UniWebViewGradleCommentNode || n is UniWebViewGradleContentNode)
+                continue;
+            if (n.Name == name)
+                return n;
+        }
+        return null;
+    }
+
+    public bool ReplaceContentStartsWith(string pattern, string value)
+    {
+        foreach (var n in Children)
+        {
+            if (!(n is UniWebViewGradleContentNode)) continue;
+            if (n.m_name.StartsWith(pattern))
+            {
+                n.m_name = value;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public UniWebViewGradleContentNode ReplaceContentOrAddStartsWith(string pattern, string value)
+    {
+        foreach (var n in Children)
+        {
+            if (!(n is UniWebViewGradleContentNode)) continue;
+            if (n.m_name.StartsWith(pattern))
+            {
+                n.m_name = value;
+                return (UniWebViewGradleContentNode)n;
+            }
+        }
+        return AppendContentNode(value);
+    }
+    
+    public UniWebViewGradleContentNode AppendContentNode(string content)
+    {
+        foreach (var n in Children)
+        {
+            if (!(n is UniWebViewGradleContentNode)) continue;
+            if (n.m_name == content)
+            {
+                Debug.Log("UniWebViewGradleContentNode with " + content + " already exists!");
+                return null;
+            }
+        }
+        UniWebViewGradleContentNode cnode = new UniWebViewGradleContentNode(content, this);
+        AppendChildNode(cnode);
+        return cnode;
+    }
+
+
+    public bool RemoveContentNode(string contentPattern)
+    {
+        for(int i=0;i<Children.Count;i++)
+        {
+            if (!(Children[i] is UniWebViewGradleContentNode)) continue;
+            if(Children[i].m_name.Contains(contentPattern))
+            {
+                Children.RemoveAt(i);
+                return true;
+            }
+        }
+        return false;
+    }
+}
+
+public sealed class UniWebViewGradleContentNode : UniWebViewGradleNode
+{
+    public UniWebViewGradleContentNode(String content, UniWebViewGradleNode parent) : base(content, parent)
+    {
+
+    }
+
+    public void SetContent(string content)
+    {
+        m_name = content;
+    }
+}
+
+public sealed class UniWebViewGradleCommentNode : UniWebViewGradleNode
+{
+    public UniWebViewGradleCommentNode(String content, UniWebViewGradleNode parent) : base(content, parent)
+    {
+
+    }
+
+    public string GetComment()
+    {
+        return m_name;
+    }
+}
+

Assets/UniWebView/Editor/BuildGradle.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 4a73a3268e19f44f7be818c5db9af457
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Editor/GradleProperty.cs

@@ -0,0 +1,47 @@
+using System.Linq;
+using System.Text;
+using System.IO;
+
+public class UniWebViewGradlePropertyPatcher {
+    
+    private readonly string filePath;
+    private readonly UniWebViewEditorSettings settings;
+
+    // Construct a patcher with file path.
+    public UniWebViewGradlePropertyPatcher(string filePath, UniWebViewEditorSettings settings)
+    {
+        this.filePath = filePath;
+        this.settings = settings;
+    }
+    
+    public void Patch()
+    {
+        var result = UpdatedString();
+        File.WriteAllText(filePath, result);
+    }
+
+    public string UpdatedString()
+    {
+        var lines = File.ReadAllLines(filePath);
+
+        var hasAndroidXProperty = lines.Any(text => text.Contains("android.useAndroidX"));
+        var hasJetifierProperty = lines.Any(text => text.Contains("android.enableJetifier"));
+
+        var builder = new StringBuilder();
+
+        foreach(var each in lines) {
+            builder.AppendLine(each);
+        }
+        
+        if (!hasAndroidXProperty) {
+            builder.AppendLine("android.useAndroidX=true");
+        }
+
+        if (!hasJetifierProperty && settings.enableJetifier) {
+            builder.AppendLine("android.enableJetifier=true");
+        }
+
+        // AppendLine will add a new line at the end of the string, so we need to trim it to keep the file clean.
+        return builder.ToString().Trim();
+    }
+}

Assets/UniWebView/Editor/GradleProperty.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 62bf94600ac0f42c09fc261d7ab19e12
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Editor/UniWebView-CSharp.Editor.asmdef

@@ -0,0 +1,15 @@
+{
+    "name": "UniWebView-CSharp.Editor",
+    "references": ["GUID:343deaaf83e0cee4ca978e7df0b80d21","GUID:2bafac87e7f4b9b418d9448d219b01ab"],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Assets/UniWebView/Editor/UniWebView-CSharp.Editor.asmdef.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: b6d0e5b49a073436cbcd56804553ee20
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Editor/UniWebViewEditorSettings.cs

@@ -0,0 +1,219 @@
+using UnityEngine;
+using UnityEditor;
+using System.Collections.Generic;
+using System;
+using System.IO;
+
+public class UniWebViewEditorSettings: ScriptableObject
+{
+    private const string AssetPath = "Assets/Editor/UniWebView/settings.asset";
+
+    [SerializeField]
+    internal bool usesCleartextTraffic = false;
+
+    [SerializeField]
+    internal bool writeExternalStorage = false;
+
+    [SerializeField]
+    internal bool accessFineLocation = false;
+
+    [SerializeField]
+    internal bool addsKotlin = true;
+
+    [SerializeField] 
+    internal string kotlinVersion = null;
+
+    [SerializeField]
+    internal bool addsAndroidBrowser = true;
+
+    [SerializeField]
+    internal string androidBrowserVersion = null;
+    
+    [SerializeField]
+    internal bool addsAndroidXCore = false;
+    
+    [SerializeField]
+    internal string androidXCoreVersion = null;
+
+    [SerializeField]
+    internal bool enableJetifier = true;
+
+    [SerializeField]
+    internal string[] authCallbackUrls = { };
+    
+    [SerializeField]
+    internal bool supportLINELogin = false;
+
+    internal static string defaultKotlinVersion = "1.6.21";
+    internal static string defaultAndroidBrowserVersion = "1.2.0";
+    internal static string defaultAndroidXCoreVersion = "1.5.0";
+
+    internal static UniWebViewEditorSettings GetOrCreateSettings() {
+        var settings = AssetDatabase.LoadAssetAtPath<UniWebViewEditorSettings>(AssetPath);
+
+        if (settings == null) {
+            settings = ScriptableObject.CreateInstance<UniWebViewEditorSettings>();
+
+            Directory.CreateDirectory("Assets/Editor/UniWebView/");
+            AssetDatabase.CreateAsset(settings, AssetPath);
+            AssetDatabase.SaveAssets();
+        }
+
+        return settings;
+    }
+
+    internal static SerializedObject GetSerializedSettings() {
+        return new SerializedObject(GetOrCreateSettings());
+    }
+}
+
+// UniWebViewEditorSettings is not working well with AndroidProjectFilesModifier.
+// (reading it requires main thread, but the OnModifyAndroidProjectFiles is not in main thread)
+[Serializable]
+public class UniWebViewEditorSettingsReading {
+    public bool usesCleartextTraffic = false;
+    public bool writeExternalStorage = false;
+    public bool accessFineLocation = false;
+    public bool addsKotlin = true;
+    public string kotlinVersion = null;
+    public bool addsAndroidBrowser = true;
+    public string androidBrowserVersion = null;
+    public bool addsAndroidXCore = false;
+    public string androidXCoreVersion = null;
+    public bool enableJetifier = true;
+    public string[] authCallbackUrls = { };
+    public bool supportLINELogin = false;
+}
+
+static class UniWebViewSettingsProvider {
+    static SerializedObject settings;
+
+    #if UNITY_2018_3_OR_NEWER
+    private class Provider : SettingsProvider {
+        public Provider(string path, SettingsScope scope = SettingsScope.User): base(path, scope) {}
+        public override void OnGUI(string searchContext) {
+            DrawPref();
+        }
+    }
+    [SettingsProvider]
+    static SettingsProvider UniWebViewPref() {
+        return new Provider("Preferences/UniWebView");
+    }
+    #else
+    [PreferenceItem("UniWebView")]
+    #endif
+    static void DrawPref() {
+        EditorGUIUtility.labelWidth = 320;
+        EditorGUIUtility.fieldWidth = 20;
+        if (settings == null) {
+            settings = UniWebViewEditorSettings.GetSerializedSettings();
+        }
+        settings.Update();
+        EditorGUI.BeginChangeCheck();
+
+        // Manifest
+        EditorGUILayout.Space();
+        EditorGUILayout.BeginVertical();
+        EditorGUILayout.LabelField("Android Manifest", EditorStyles.boldLabel);
+
+        EditorGUI.indentLevel++;
+        EditorGUILayout.PropertyField(settings.FindProperty("usesCleartextTraffic"));
+        DrawDetailLabel("If you need to load plain HTTP content.");
+        
+        EditorGUILayout.PropertyField(settings.FindProperty("writeExternalStorage"));
+        DrawDetailLabel("If you need to download an image from web page.");
+
+        EditorGUILayout.PropertyField(settings.FindProperty("accessFineLocation"));
+        DrawDetailLabel("If you need to enable location support in web view.");
+        EditorGUI.indentLevel--;
+        EditorGUILayout.EndVertical();
+
+        // Gradle
+        EditorGUILayout.Space();
+        EditorGUILayout.BeginVertical();
+        EditorGUILayout.LabelField("Gradle Build", EditorStyles.boldLabel);
+        EditorGUI.indentLevel++;
+        EditorGUILayout.PropertyField(settings.FindProperty("addsKotlin"));
+        DrawDetailLabel("Turn off this if another library is already adding Kotlin runtime.");
+        var addingKotlin = settings.FindProperty("addsKotlin").boolValue;
+        if (addingKotlin) {
+            EditorGUI.indentLevel++;
+            EditorGUILayout.PropertyField(settings.FindProperty("kotlinVersion"), GUILayout.Width(400));
+            DrawDetailLabel("If not specified, use the default version: " + UniWebViewEditorSettings.defaultKotlinVersion);
+            EditorGUI.indentLevel--;            
+        }
+
+        EditorGUILayout.PropertyField(settings.FindProperty("addsAndroidBrowser"));
+        DrawDetailLabel("Turn off this if another library is already adding 'androidx.browser:browser'.");
+        var addingBrowser = settings.FindProperty("addsAndroidBrowser").boolValue;
+        if (addingBrowser) {
+            EditorGUI.indentLevel++;
+            EditorGUILayout.PropertyField(settings.FindProperty("androidBrowserVersion"), GUILayout.Width(400));
+            DrawDetailLabel("If not specified, use the default version: " + UniWebViewEditorSettings.defaultAndroidBrowserVersion);
+            EditorGUI.indentLevel--;            
+        }
+
+        if (!addingBrowser) {
+            EditorGUILayout.BeginVertical("box");
+            EditorGUILayout.HelpBox("UniWebView at least requires `androidx.core` to run. Without it, your game will crash when launching.\nIf you do not have another `androidx.core` package in the project, enable the option below.", MessageType.Warning);
+            EditorGUILayout.PropertyField(settings.FindProperty("addsAndroidXCore"));
+            DrawDetailLabel("Turn on this if you disabled `Adds Android Browser` and there is no other library adding 'androidx.core:core'.");
+            var addingCore = settings.FindProperty("addsAndroidXCore").boolValue;
+            if (addingCore) {
+                EditorGUI.indentLevel++;
+                EditorGUILayout.PropertyField(settings.FindProperty("androidXCoreVersion"), GUILayout.Width(400));
+                DrawDetailLabel("If not specified, use the default version: " + UniWebViewEditorSettings.defaultAndroidXCoreVersion);
+                EditorGUI.indentLevel--;            
+            }
+            EditorGUILayout.EndVertical();
+        }
+        
+        
+        EditorGUILayout.PropertyField(settings.FindProperty("enableJetifier"));
+        DrawDetailLabel("Turn off this if you do not need Jetifier (for converting other legacy support dependencies to Android X).");
+        EditorGUI.indentLevel--;
+        EditorGUILayout.EndVertical();
+
+        // Auth callbacks
+        EditorGUILayout.Space();
+        EditorGUILayout.BeginVertical();
+        EditorGUILayout.LabelField("Auth Callbacks", EditorStyles.boldLabel);
+        EditorGUI.indentLevel++;
+        EditorGUILayout.PropertyField(settings.FindProperty("authCallbackUrls"), true);
+        DrawDetailLabel("Adds all available auth callback URLs here to use UniWebView's auth support.");
+        
+        EditorGUILayout.Space();
+        EditorGUILayout.PropertyField(settings.FindProperty("supportLINELogin"));
+        DrawDetailLabel("LINE Login is using a custom fixed scheme. If you want to support LINE Login, turn on this.");
+        
+        EditorGUI.indentLevel--;
+        EditorGUILayout.EndVertical();
+
+        EditorGUILayout.Space();
+        EditorGUILayout.BeginHorizontal();
+        EditorGUI.indentLevel++;
+        EditorGUILayout.HelpBox("Read the help page to know more about all UniWebView preferences detail.", MessageType.Info);
+        
+        var style = new GUIStyle(GUI.skin.label);
+        style.normal.textColor = Color.blue;
+        if (GUILayout.Button("Help Page", style)) {
+          Application.OpenURL("https://docs.uniwebview.com/guide/installation.html#optional-steps");
+        }
+        
+        EditorGUILayout.Space();
+        EditorGUI.indentLevel--;
+        EditorGUILayout.EndHorizontal();
+        
+        if (EditorGUI.EndChangeCheck()) {
+            settings.ApplyModifiedProperties();
+            AssetDatabase.SaveAssets();
+        }
+        EditorGUIUtility.labelWidth = 0;
+    }
+
+    static void DrawDetailLabel(string text) {
+        EditorGUI.indentLevel++;
+        EditorGUILayout.LabelField(text, EditorStyles.miniLabel);
+        EditorGUI.indentLevel--;
+    }
+}

Assets/UniWebView/Editor/UniWebViewEditorSettings.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a403a09e241a0480a957591ea60fb785
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Editor/UniWebViewPostBuildProcessor.cs

@@ -0,0 +1,337 @@
+
+// #if UNITY_2023_2_OR_NEWER
+#if UNIWEBVIEW_NEW_ANDROID_BUILD_SYSTEM
+
+using System;
+using System.Linq;
+using Unity.Android.Gradle;
+using Unity.Android.Gradle.Manifest;
+using UnityEditor.Android;
+using UnityEngine;
+using Action = Unity.Android.Gradle.Manifest.Action;
+
+class UniWebViewPostBuildModifier : AndroidProjectFilesModifier {
+    
+    const string ContextSettingsKey = "uniwebview_settings";
+    
+    public override AndroidProjectFilesModifierContext Setup() {
+        var context = new AndroidProjectFilesModifierContext {
+            Dependencies = {
+                DependencyFiles = new[] {
+                    // Set UniWebView editor settings asset path to be included in the build. With that we do not need
+                    // a clean build to update the settings anymore (maybe, not confirmed).
+                    UniWebViewEditorSettings.AssetPath
+                }
+            }
+        };
+
+        var settings = UniWebViewEditorSettings.GetOrCreateSettings();
+        context.SetData(ContextSettingsKey, settings);
+        return context;
+    }
+
+    public override void OnModifyAndroidProjectFiles(AndroidProjectFiles projectFiles) {
+        var settings = projectFiles.GetData<UniWebViewEditorSettingsReading>(ContextSettingsKey);
+        PatchUnityLibraryAndroidManifest(projectFiles.UnityLibraryManifest, settings);
+        PatchUnityLibraryBuildGradle(projectFiles.UnityLibraryBuildGradle, settings);
+        PatchGradleProperty(projectFiles.GradleProperties, settings);
+    }
+
+    private void PatchUnityLibraryAndroidManifest(
+        AndroidManifestFile manifest, UniWebViewEditorSettingsReading settings
+    ) {
+        // Set hardwareAccelerated
+        var launcherActivities = manifest.Manifest.GetActivitiesWithLauncherIntent();
+        foreach (var activity in launcherActivities)  {
+            // Required for playing video in web view.
+            activity.Attributes.HardwareAccelerated.Set(true);
+        }
+        
+        // Set usesCleartextTraffic
+        if (settings.usesCleartextTraffic) {
+            manifest.Manifest.Application.Attributes.UsesCleartextTraffic.Set(true);
+        }
+        
+        // Set WRITE_EXTERNAL_STORAGE permission
+        if (settings.writeExternalStorage) {
+            AddUsesPermission(manifest, "android.permission.WRITE_EXTERNAL_STORAGE");
+        }
+
+        // Set ACCESS_FINE_LOCATION permission
+        if (settings.accessFineLocation) {
+            AddUsesPermission(manifest, "android.permission.ACCESS_FINE_LOCATION");
+        }
+        
+        // Set auth callback intent filter
+        if (settings.authCallbackUrls.Length > 0 || settings.supportLINELogin) {
+            var authActivity = new Activity();
+            authActivity.Attributes.Name.Set("com.onevcat.uniwebview.UniWebViewAuthenticationActivity");
+            authActivity.Attributes.Exported.Set(true);
+            authActivity.Attributes.LaunchMode.Set(LaunchMode.SingleTask);
+            authActivity.Attributes.ConfigChanges.Set(
+                new[] {
+                    ConfigChanges.Orientation, ConfigChanges.ScreenSize, ConfigChanges.KeyboardHidden
+                });
+            
+            foreach (var url in settings.authCallbackUrls) {
+                AddAuthCallbacksIntentFilter(authActivity, url);
+            }
+            if (settings.supportLINELogin) {
+                AddAuthCallbacksIntentFilter(authActivity, "lineauth://auth");
+            }
+            manifest.Manifest.Application.ActivityList.AddElement(authActivity);            
+        }
+    }
+
+    private void PatchUnityLibraryBuildGradle(ModuleBuildGradleFile gradleFile, UniWebViewEditorSettingsReading settings) {
+        if (settings.addsKotlin) {
+            var kotlinPrefix = "org.jetbrains.kotlin:kotlin-stdlib-jdk7:";
+            var kotlinVersion = String.IsNullOrWhiteSpace(settings.kotlinVersion) 
+                ? UniWebViewEditorSettings.defaultKotlinVersion : settings.kotlinVersion;
+            ReplaceContentOrAddStartsWith(gradleFile.Dependencies, 
+                kotlinPrefix, 
+                kotlinVersion);
+            Debug.Log("<UniWebView> Updated Kotlin dependency in build.gradle.");
+        }
+
+        if (settings.addsAndroidBrowser) {
+            var browserPrefix = "androidx.browser:browser:";
+            var browserVersion = String.IsNullOrWhiteSpace(settings.androidBrowserVersion) 
+                ? UniWebViewEditorSettings.defaultAndroidBrowserVersion : settings.androidBrowserVersion;
+            ReplaceContentOrAddStartsWith(gradleFile.Dependencies,
+                browserPrefix, 
+                browserVersion);
+            Debug.Log("<UniWebView> Updated Browser dependency in build.gradle.");
+        }
+
+        if (!settings.addsAndroidBrowser && settings.addsAndroidXCore) {
+            var androidXCorePrefix = "androidx.core:core:";
+            var androidXCoreVersion = String.IsNullOrWhiteSpace(settings.androidXCoreVersion) 
+                ? UniWebViewEditorSettings.defaultAndroidXCoreVersion : settings.androidXCoreVersion;
+            ReplaceContentOrAddStartsWith(gradleFile.Dependencies,
+                androidXCorePrefix, 
+                androidXCoreVersion);
+            Debug.Log("<UniWebView> Updated Android X Core dependency in build.gradle.");
+        }
+    }
+
+    private void PatchGradleProperty(GradlePropertiesFile file, UniWebViewEditorSettingsReading settings) {
+        var values = file.GetElements();
+        foreach (var ele in values) {
+            if (ele.GetRaw().Contains("android.enableJetifier")) {
+                ele.SetRaw("android.enableJetifier=" + (settings.enableJetifier ? "true": "false"));
+            }
+        }
+    }
+
+    private void AddUsesPermission(AndroidManifestFile manifest, string name) {
+
+        var list = manifest.Manifest.UsesPermissionList;
+        foreach (var item in list) {
+            Debug.LogError(item.GetName());
+        }
+        
+        var existing = manifest.Manifest.UsesPermissionList
+            .FirstOrDefault(ele => ele.Attributes.Name.Get() == name);
+        if (existing != null) {
+            return;
+        }
+        var permission = new UsesPermission();
+        permission.Attributes.Name.Set(name);
+        manifest.Manifest.UsesPermissionList.AddElement(permission);
+    }
+
+    private void AddAuthCallbacksIntentFilter(Activity activity, string callbackUrl) {
+        var uri = new Uri(callbackUrl);
+        var scheme = uri.Scheme;
+        
+        if (String.IsNullOrEmpty(scheme)) {
+            Debug.LogError("<UniWebView> Auth callback url contains an empty scheme. Please check the url: " + callbackUrl);
+            return;
+        }
+        
+        var intentFilter = new IntentFilter();
+        
+        var action = new Action();
+        action.Attributes.Name.Set("android.intent.action.VIEW");
+        intentFilter.ActionList.AddElement(action);
+        
+        var defaultCategory = new Category();
+        intentFilter.CategoryList.AddElement(defaultCategory);
+        defaultCategory.Attributes.Name.Set("android.intent.category.DEFAULT");
+
+        var browsableCategory = new Category();
+        browsableCategory.Attributes.Name.Set("android.intent.category.BROWSABLE");
+        intentFilter.CategoryList.AddElement(browsableCategory);
+
+        var data = new Data();
+        data.Attributes.Scheme.Set(scheme);
+        if (!String.IsNullOrEmpty(uri.Host)) {
+            data.Attributes.Host.Set(uri.Host);
+        }
+        if (uri.Port != -1) {
+            data.Attributes.Port.Set(uri.Port.ToString());
+        }
+        if (!String.IsNullOrEmpty(uri.PathAndQuery) && uri.PathAndQuery != "/") {
+            data.Attributes.Path.Set(uri.PathAndQuery);
+        }
+        intentFilter.DataList.AddElement(data);
+        activity.IntentFilterList.AddElement(intentFilter);
+    }
+
+    private void ReplaceContentOrAddStartsWith(Dependencies dependencies, string prefix, string version) {
+        var all = dependencies.GetElements();
+        var matching = "implementation '" + prefix;
+        var found = all.FirstOrDefault(ele => ele.GetRaw().StartsWith(matching));
+        if (found != null) {
+            found.SetRaw($"implementation '{prefix}{version}'");
+        } else {
+            dependencies.AddDependencyImplementationRaw($"'{prefix}{version}'");
+        }
+    }
+}
+
+#else
+using System;
+using UnityEditor;
+using UnityEditor.Android;
+using UnityEngine;
+using System.IO;
+using System.Text;
+
+class UniWebViewPostBuildProcessor : IPostGenerateGradleAndroidProject
+{
+    public int callbackOrder { get { return 1; } }
+    public void OnPostGenerateGradleAndroidProject(string path) {
+        Debug.Log("<UniWebView> UniWebView Post Build Scirpt is patching manifest file and gradle file...");
+        PatchAndroidManifest(path);
+        PatchBuildGradle(path);
+        PatchGradleProperty(path);
+    }
+
+    private void PatchAndroidManifest(string root) {
+        var manifestFilePath = GetManifestFilePath(root);
+        var manifest = new UniWebViewAndroidManifest(manifestFilePath);
+        
+        var changed = false;
+        
+        Debug.Log("<UniWebView> Set hardware accelerated to enable smooth web view experience and HTML5 support like video and canvas.");
+        changed = manifest.SetHardwareAccelerated() || changed;
+
+        var settings = UniWebViewEditorSettings.GetOrCreateSettings();
+        if (settings.usesCleartextTraffic) {
+            changed = manifest.SetUsesCleartextTraffic() || changed;
+        }
+        if (settings.writeExternalStorage) {
+            changed = manifest.AddWriteExternalStoragePermission() || changed;
+        }
+        if (settings.accessFineLocation) {
+            changed = manifest.AddAccessFineLocationPermission() || changed;
+        }
+        if (settings.authCallbackUrls.Length > 0) {
+            changed = manifest.AddAuthCallbacksIntentFilter(settings.authCallbackUrls) || changed;
+        }
+
+        if (settings.supportLINELogin) {
+            changed = manifest.AddAuthCallbacksIntentFilter(new string[] { "lineauth://auth" }) || changed;
+        }
+
+        if (changed) {
+            manifest.Save();
+        }
+    }
+
+    private void PatchBuildGradle(string root) {
+        var gradleFilePath = GetGradleFilePath(root);
+        var config = new UniWebViewGradleConfig(gradleFilePath);
+
+        var settings = UniWebViewEditorSettings.GetOrCreateSettings();
+        
+        var kotlinPrefix = "implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:";
+        var kotlinVersion = String.IsNullOrWhiteSpace(settings.kotlinVersion) 
+            ? UniWebViewEditorSettings.defaultKotlinVersion : settings.kotlinVersion;
+
+        var browserPrefix = "implementation 'androidx.browser:browser:";
+        var browserVersion = String.IsNullOrWhiteSpace(settings.androidBrowserVersion) 
+            ? UniWebViewEditorSettings.defaultAndroidBrowserVersion : settings.androidBrowserVersion;
+
+        var androidXCorePrefix = "implementation 'androidx.core:core:";
+        var androidXCoreVersion = String.IsNullOrWhiteSpace(settings.androidXCoreVersion) 
+            ? UniWebViewEditorSettings.defaultAndroidXCoreVersion : settings.androidXCoreVersion;
+        
+        var dependenciesNode = config.Root.FindChildNodeByName("dependencies");
+        if (dependenciesNode != null) {
+            // Add kotlin
+            if (settings.addsKotlin) {
+                dependenciesNode.ReplaceContentOrAddStartsWith(kotlinPrefix, kotlinPrefix + kotlinVersion + "'");
+                Debug.Log("<UniWebView> Updated Kotlin dependency in build.gradle.");
+            }
+
+            // Add browser package
+            if (settings.addsAndroidBrowser) {
+                dependenciesNode.ReplaceContentOrAddStartsWith(browserPrefix, browserPrefix + browserVersion + "'");
+                Debug.Log("<UniWebView> Updated Browser dependency in build.gradle.");
+            }
+
+            // Add Android X Core package
+            if (!settings.addsAndroidBrowser && settings.addsAndroidXCore) {
+                // When adding android browser to the project, we don't need to add Android X Core package, since gradle resolves for it.
+                dependenciesNode.ReplaceContentOrAddStartsWith(androidXCorePrefix, androidXCorePrefix + androidXCoreVersion + "'");
+                Debug.Log("<UniWebView> Updated Android X Core dependency in build.gradle.");
+            }
+        } else {
+            Debug.LogError("UniWebViewPostBuildProcessor didn't find the `dependencies` field in build.gradle.");
+            Debug.LogError("Although we can continue to add a `dependencies`, make sure you have setup Gradle and the template correctly.");
+
+            var newNode = new UniWebViewGradleNode("dependencies", config.Root);
+            if (settings.addsKotlin) {
+                newNode.AppendContentNode(kotlinPrefix + kotlinVersion + "'");
+            }
+            if (settings.addsAndroidBrowser) {
+                newNode.AppendContentNode(browserPrefix + browserVersion + "'");
+            }
+
+            if (settings.addsAndroidXCore) {
+                newNode.AppendContentNode(androidXCorePrefix + androidXCoreVersion + "'");
+            }
+            newNode.AppendContentNode("implementation(name: 'UniWebView', ext:'aar')");
+            config.Root.AppendChildNode(newNode);
+        }
+        config.Save();
+    }
+
+    private void PatchGradleProperty(string root) {
+        var gradlePropertyFilePath = GetGradlePropertyFilePath(root);
+        var patcher =
+            new UniWebViewGradlePropertyPatcher(gradlePropertyFilePath, UniWebViewEditorSettings.GetOrCreateSettings());
+        patcher.Patch();
+    }
+
+    private string CombinePaths(string[] paths) {
+        var path = "";
+        foreach (var item in paths) {
+            path = Path.Combine(path, item);
+        }
+        return path;
+    }
+
+    private string GetManifestFilePath(string root) {
+        string[] comps = {root, "src", "main", "AndroidManifest.xml"};
+        return CombinePaths(comps);
+    }
+
+    private string GetGradleFilePath(string root) {
+        string[] comps = {root, "build.gradle"};
+        return CombinePaths(comps);
+    }
+
+    private string GetGradlePropertyFilePath(string root) {
+        #if UNITY_2019_3_OR_NEWER
+        string[] compos = {root, "..", "gradle.properties"};
+        #else
+        string[] compos = {root, "gradle.properties"};
+        #endif
+        return CombinePaths(compos);
+    }
+}
+#endif

Assets/UniWebView/Editor/UniWebViewPostBuildProcessor.cs.meta

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+  serializedVersion: 2
+  defaultReferences: []
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Assets/UniWebView/Interface.meta

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+DefaultImporter:
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Assets/UniWebView/Interface/UniWebViewAndroid.cs

@@ -0,0 +1,568 @@
+#if UNITY_ANDROID && !UNITY_EDITOR
+
+using UnityEngine;
+
+class UniWebViewMethodChannel: AndroidJavaProxy
+    {
+        public UniWebViewMethodChannel() : base("com.onevcat.uniwebview.UniWebViewNativeChannel") { }
+
+        string invokeChannelMethod(string name, string method, string parameters) {
+            UniWebViewLogger.Instance.Verbose("invokeChannelMethod invoked by native side. Name: " + name + " Method: " 
+                                          + method + " Params: " + parameters);
+            return UniWebViewChannelMethodManager.Instance.InvokeMethod(name, method, parameters);
+        }
+    }
+
+public class UniWebViewInterface {
+    private static readonly AndroidJavaClass plugin;
+    private static bool correctPlatform = Application.platform == RuntimePlatform.Android;
+    
+    static UniWebViewInterface() {
+        var go = new GameObject("UniWebViewAndroidStaticListener");
+        go.AddComponent<UniWebViewAndroidStaticListener>();
+        plugin = new AndroidJavaClass("com.onevcat.uniwebview.UniWebViewInterface");
+        
+        CheckPlatform();
+
+        plugin.CallStatic("prepare");
+
+        UniWebViewLogger.Instance.Info("Connecting to native side method channel.");
+        plugin.CallStatic("registerChannel", new UniWebViewMethodChannel());
+    }
+
+    public static void SetLogLevel(int level) {
+        CheckPlatform();
+        plugin.CallStatic("setLogLevel", level); 
+    }
+
+    public static bool IsWebViewSupported() {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("isWebViewSupported");
+    }
+
+    public static void Init(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+        plugin.CallStatic("init", name, x, y, width, height);
+    }
+
+    public static void Destroy(string name) {
+        CheckPlatform();
+        plugin.CallStatic("destroy", name);
+    }
+
+    public static void Load(string name, string url, bool skipEncoding, string readAccessURL) {
+        CheckPlatform();
+        plugin.CallStatic("load", name, url);
+    }
+
+    public static void LoadHTMLString(string name, string html, string baseUrl, bool skipEncoding) {
+        CheckPlatform();
+        plugin.CallStatic("loadHTMLString", name, html, baseUrl);
+    }
+
+    public static void Reload(string name) {
+        CheckPlatform();
+        plugin.CallStatic("reload", name);
+    }
+
+    public static void Stop(string name) {
+        CheckPlatform();
+        plugin.CallStatic("stop", name);
+    }
+
+    public static string GetUrl(string name) {
+        CheckPlatform();
+        return plugin.CallStatic<string>("getUrl", name);
+    }
+
+    public static void SetFrame(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+        plugin.CallStatic("setFrame", name, x, y, width, height);
+    }
+
+    public static void SetPosition(string name, int x, int y) {
+        CheckPlatform();
+        plugin.CallStatic("setPosition", name, x, y);
+    }
+
+    public static void SetSize(string name, int width, int height) {
+        CheckPlatform();
+        plugin.CallStatic("setSize", name, width, height);
+    }
+
+    public static bool Show(string name, bool fade, int edge, float duration, bool useAsync, string identifier) {
+        CheckPlatform();
+        if (useAsync) {
+            plugin.CallStatic("showAsync", name, fade, edge, duration, identifier);
+            return true;
+        } else {
+            return plugin.CallStatic<bool>("show", name, fade, edge, duration, identifier);
+        }
+    }
+
+    public static bool Hide(string name, bool fade, int edge, float duration, bool useAsync, string identifier) {
+        CheckPlatform();
+        if (useAsync) {
+            plugin.CallStatic("hideAsync", name, fade, edge, duration, identifier);
+            return true;
+        } else {
+            return plugin.CallStatic<bool>("hide", name, fade, edge, duration, identifier);
+        }
+    }
+
+    public static bool AnimateTo(string name, int x, int y, int width, int height, float duration, float delay, string identifier) {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("animateTo", name, x, y, width, height, duration, delay, identifier);
+    }
+
+    public static void AddJavaScript(string name, string jsString, string identifier) {
+        CheckPlatform();
+        plugin.CallStatic("addJavaScript", name, jsString, identifier);
+    }
+
+    public static void EvaluateJavaScript(string name, string jsString, string identifier) {
+        CheckPlatform();
+        plugin.CallStatic("evaluateJavaScript", name, jsString, identifier);
+    }
+
+    public static void AddUrlScheme(string name, string scheme) {
+        CheckPlatform();
+        plugin.CallStatic("addUrlScheme", name, scheme);
+    }
+
+    public static void RemoveUrlScheme(string name, string scheme) {
+        CheckPlatform();
+        plugin.CallStatic("removeUrlScheme", name, scheme);
+    }
+
+    public static void AddSslExceptionDomain(string name, string domain) {
+        CheckPlatform();
+        plugin.CallStatic("addSslExceptionDomain", name, domain);
+    }
+
+    public static void RemoveSslExceptionDomain(string name, string domain) {
+        CheckPlatform();
+        plugin.CallStatic("removeSslExceptionDomain", name, domain);
+    }
+
+    public static void AddPermissionTrustDomain(string name, string domain) {
+        CheckPlatform();
+        plugin.CallStatic("addPermissionTrustDomain", name, domain);
+    }
+
+    public static void RemovePermissionTrustDomain(string name, string domain) {
+        CheckPlatform();
+        plugin.CallStatic("removePermissionTrustDomain", name, domain);
+    }
+
+    public static void SetHeaderField(string name, string key, string value) {
+        CheckPlatform();
+        plugin.CallStatic("setHeaderField", name, key, value);
+    }
+
+    public static void SetUserAgent(string name, string userAgent) {
+        CheckPlatform();
+        plugin.CallStatic("setUserAgent", name, userAgent);
+    }
+
+    public static string GetUserAgent(string name) {
+        CheckPlatform();
+        return plugin.CallStatic<string>("getUserAgent", name);
+    }
+
+    public static void SetAllowAutoPlay(bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowAutoPlay", flag);
+    }
+
+    public static void SetAllowJavaScriptOpenWindow(bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowJavaScriptOpenWindow", flag);
+    }
+
+    public static void SetAllowFileAccess(string name, bool flag) { 
+        CheckPlatform();
+        plugin.CallStatic("setAllowFileAccess", name, flag);
+    }
+
+    public static void SetAcceptThirdPartyCookies(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAcceptThirdPartyCookies", name, flag);
+    }
+
+    public static void SetAllowFileAccessFromFileURLs(string name, bool flag) { 
+        CheckPlatform();
+        plugin.CallStatic("setAllowFileAccessFromFileURLs", name, flag);
+    }
+
+    public static void SetAllowUniversalAccessFromFileURLs(bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowUniversalAccessFromFileURLs", flag);
+    }
+    public static void BringContentToFront(string name) {
+        CheckPlatform();
+        plugin.CallStatic("bringContentToFront", name);
+    }
+
+    public static void SetForwardWebConsoleToNativeOutput(bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setForwardWebConsoleToNativeOutput", flag);
+    }
+
+    public static void SetEnableKeyboardAvoidance(bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setEnableKeyboardAvoidance", flag);
+    }
+
+    public static void SetJavaScriptEnabled(bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setJavaScriptEnabled", enabled);
+    }
+
+    public static void CleanCache(string name) {
+        CheckPlatform();
+        plugin.CallStatic("cleanCache", name);
+    }
+
+    public static void SetCacheMode(string name, int mode) {
+        CheckPlatform();
+        plugin.CallStatic("setCacheMode", name, mode);
+    }
+
+    public static void ClearCookies() {
+        CheckPlatform();
+        plugin.CallStatic("clearCookies");
+    }
+
+    public static void SetCookie(string url, string cookie, bool skipEncoding) {
+        CheckPlatform();
+        plugin.CallStatic("setCookie", url, cookie);
+    }
+
+    public static string GetCookie(string url, string key, bool skipEncoding) {
+        CheckPlatform();
+        return plugin.CallStatic<string>("getCookie", url, key);
+    }
+
+    public static void RemoveCookies(string url, bool skipEncoding) {
+        CheckPlatform();
+        plugin.CallStatic("removeCookies", url);
+    }
+
+    public static void RemoveCookie(string url, string key, bool skipEncoding) {
+        CheckPlatform();
+        plugin.CallStatic("removeCookie", url, key);
+    }
+
+    public static void ClearHttpAuthUsernamePassword(string host, string realm) {
+        CheckPlatform();
+        plugin.CallStatic("clearHttpAuthUsernamePassword", host, realm);
+    }
+
+    public static void SetBackgroundColor(string name, float r, float g, float b, float a) {
+        CheckPlatform();
+        plugin.CallStatic("setBackgroundColor", name, r, g, b, a);
+    }
+
+    public static void SetWebViewAlpha(string name, float alpha) {
+        CheckPlatform();
+        plugin.CallStatic("setWebViewAlpha", name, alpha);
+    }
+
+    public static float GetWebViewAlpha(string name) {
+        CheckPlatform();
+        return plugin.CallStatic<float>("getWebViewAlpha", name);
+    }
+
+    public static void SetShowSpinnerWhileLoading(string name, bool show) {
+        CheckPlatform();
+        plugin.CallStatic("setShowSpinnerWhileLoading", name, show);
+    }
+
+    public static void SetSpinnerText(string name, string text) {
+        CheckPlatform();
+        plugin.CallStatic("setSpinnerText", name, text);
+    }
+
+    public static void SetAllowUserDismissSpinnerByGesture(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowUserDismissSpinnerByGesture", name, flag);
+    }
+
+    public static void ShowSpinner(string name) {
+        CheckPlatform();
+        plugin.CallStatic("showSpinner", name);
+    }
+
+    public static void HideSpinner(string name) {
+        CheckPlatform();
+        plugin.CallStatic("hideSpinner", name);
+    }
+
+    public static bool CanGoBack(string name) {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("canGoBack", name);
+    }
+
+    public static bool CanGoForward(string name) {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("canGoForward", name);
+    }
+
+    public static void GoBack(string name) {
+        CheckPlatform();
+        plugin.CallStatic("goBack", name);
+    }
+    public static void GoForward(string name) {
+        CheckPlatform();
+        plugin.CallStatic("goForward", name);
+    }
+
+    public static void SetOpenLinksInExternalBrowser(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setOpenLinksInExternalBrowser", name, flag);
+    }
+
+    public static void SetHorizontalScrollBarEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setHorizontalScrollBarEnabled", name, enabled);
+    }
+
+    public static void SetVerticalScrollBarEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setVerticalScrollBarEnabled", name, enabled);
+    }
+
+    public static void SetBouncesEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setBouncesEnabled", name, enabled);
+    }
+
+    public static void SetZoomEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setZoomEnabled", name, enabled);
+    }
+
+    public static void SetUseWideViewPort(string name, bool use) {
+        CheckPlatform();
+        plugin.CallStatic("setUseWideViewPort", name, use);
+    }
+
+    public static void SetLoadWithOverviewMode(string name, bool overview) {
+        CheckPlatform();
+        plugin.CallStatic("setLoadWithOverviewMode", name, overview);
+    }
+
+    public static void SetImmersiveModeEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setImmersiveModeEnabled", name, enabled);
+    }
+
+    public static void SetUserInteractionEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setUserInteractionEnabled", name, enabled);
+    }
+
+    public static void SetTransparencyClickingThroughEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setTransparencyClickingThroughEnabled", name, enabled);
+    }
+
+    public static void SetWebContentsDebuggingEnabled(bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setWebContentsDebuggingEnabled", enabled);
+    }
+
+    public static void SetAllowHTTPAuthPopUpWindow(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowHTTPAuthPopUpWindow", name, flag);
+    }
+
+    public static void Print(string name) {
+        CheckPlatform();
+        plugin.CallStatic("print", name);
+    }
+
+    public static void CaptureSnapshot(string name, string filename) { 
+        CheckPlatform();
+        plugin.CallStatic("captureSnapshot", name, filename);
+    }
+
+    public static void ScrollTo(string name, int x, int y, bool animated) {
+        CheckPlatform();
+        plugin.CallStatic("scrollTo", name, x, y, animated);
+    }
+
+    public static void SetCalloutEnabled(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setCalloutEnabled", name, flag);
+    }
+
+    public static void SetSupportMultipleWindows(string name, bool enabled, bool allowJavaScriptOpening) {
+        CheckPlatform();
+        plugin.CallStatic("setSupportMultipleWindows", name, enabled, allowJavaScriptOpening);
+    }
+
+    public static void SetDragInteractionEnabled(string name, bool flag) {
+        CheckPlatform();
+        plugin.CallStatic("setDragInteractionEnabled", name, flag);
+    }
+
+    public static void SetDefaultFontSize(string name, int size) {
+        CheckPlatform();
+        plugin.CallStatic("setDefaultFontSize", name, size);
+    }
+
+    public static void SetTextZoom(string name, int textZoom) { 
+        CheckPlatform();
+        plugin.CallStatic("setTextZoom", name, textZoom);
+    }
+
+    public static float NativeScreenWidth() {
+        CheckPlatform();
+        return plugin.CallStatic<float>("screenWidth");
+    }
+
+    public static float NativeScreenHeight() {
+        CheckPlatform();
+        return plugin.CallStatic<float>("screenHeight");
+    }
+
+    public static void SetDownloadEventForContextMenuEnabled(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("setDownloadEventForContextMenuEnabled", name, enabled);
+    }
+
+    public static void SetAllowUserEditFileNameBeforeDownloading(string name, bool allowed) {
+        CheckPlatform();
+        plugin.CallStatic("setAllowUserEditFileNameBeforeDownloading", name, allowed);
+    }
+
+    // Safe Browsing
+
+    public static bool IsSafeBrowsingSupported() {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("isSafeBrowsingSupported");
+    }
+
+    public static void SafeBrowsingInit(string name, string url) { 
+        CheckPlatform();
+        plugin.CallStatic("safeBrowsingInit", name, url);
+    }
+
+    public static void SafeBrowsingSetToolbarColor(string name, float r, float g, float b) {
+        CheckPlatform(); 
+        plugin.CallStatic("safeBrowsingSetToolbarColor", name, r, g, b);
+    }
+
+    public static void SafeBrowsingShow(string name) {
+        CheckPlatform();
+        plugin.CallStatic("safeBrowsingShow", name);
+    }
+
+    // Authentication
+
+    public static bool IsAuthenticationIsSupported() {
+        CheckPlatform();
+        return plugin.CallStatic<bool>("isAuthenticationIsSupported");
+    }
+
+    public static void AuthenticationInit(string name, string url, string scheme) {
+        CheckPlatform();
+        plugin.CallStatic("authenticationInit", name, url, scheme);
+    }
+
+    public static void AuthenticationStart(string name) {
+        CheckPlatform();
+        plugin.CallStatic("authenticationStart", name);
+    }
+
+    public static void AuthenticationSetPrivateMode(string name, bool enabled) {
+        CheckPlatform();
+        plugin.CallStatic("authenticationSetPrivateMode", name, enabled);
+    }
+
+    public static void SetShowEmbeddedToolbar(string name, bool show) {
+        CheckPlatform();
+        plugin.CallStatic("setShowEmbeddedToolbar", name, show);
+    }
+
+    public static void SetEmbeddedToolbarOnTop(string name, bool top) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarOnTop", name, top);
+    }
+
+    public static void SetEmbeddedToolbarDoneButtonText(string name, string text) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarDoneButtonText", name, text);
+    }
+
+    public static void SetEmbeddedToolbarGoBackButtonText(string name, string text) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarGoBackButtonText", name, text);
+    }
+
+    public static void SetEmbeddedToolbarGoForwardButtonText(string name, string text) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarGoForwardButtonText", name, text);
+    }
+    
+    public static void SetEmbeddedToolbarTitleText(string name, string text) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarTitleText", name, text);
+    }
+
+    public static void SetEmbeddedToolbarBackgroundColor(string name, Color color) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarBackgroundColor", name, color.r, color.g, color.b, color.a);
+    }
+    
+    public static void SetEmbeddedToolbarButtonTextColor(string name, Color color) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarButtonTextColor", name, color.r, color.g, color.b, color.a);
+    }
+
+    public static void SetEmbeddedToolbarTitleTextColor(string name, Color color) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarTitleTextColor", name, color.r, color.g, color.b, color.a);
+    }
+
+    public static void SetEmeddedToolbarNavigationButtonsShow(string name, bool show) {
+        CheckPlatform();
+        plugin.CallStatic("setEmbeddedToolbarNavigationButtonsShow", name, show);
+    }
+
+    public static void StartSnapshotForRendering(string name, string identifier) {
+        CheckPlatform();
+        plugin.CallStatic("startSnapshotForRendering", name, identifier);
+    }
+
+    public static void StopSnapshotForRendering(string name) {
+        CheckPlatform();
+        plugin.CallStatic("stopSnapshotForRendering", name);
+    }
+
+    public static byte[] GetRenderedData(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+        var sbyteArray = plugin.CallStatic<sbyte[]>("getRenderedData", name, x, y, width, height);
+        if (sbyteArray == null) {
+            return null;
+        }
+        int length = sbyteArray.Length;
+        byte[] byteArray = new byte[length];
+        
+        for (int i = 0; i < length; i++) {
+            byteArray[i] = (byte)sbyteArray[i];
+        }   
+        return byteArray;
+    }
+
+    // Platform
+
+    public static void CheckPlatform() {
+        if (!correctPlatform) {
+            throw new System.InvalidOperationException("Method can only be performed on Android.");
+        }
+    }
+}
+#endif

Assets/UniWebView/Interface/UniWebViewAndroid.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 5a1d3cecc27d64565835e14b493c935b
+timeCreated: 1490880130
+licenseType: Store
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Interface/UniWebViewAndroidStaticListener.cs

@@ -0,0 +1,40 @@
+
+// #if UNITY_ANDROID && !UNITY_EDITOR
+using System;
+using System.Reflection;
+using UnityEngine;
+
+public class UniWebViewAndroidStaticListener: MonoBehaviour {
+    void Awake() {
+        DontDestroyOnLoad(gameObject);
+    }
+
+    void OnJavaMessage(string message) {
+        // {listener_name}@{method_name}@parameters
+        var parts = message.Split("@"[0]);
+        if (parts.Length < 3) {
+            Debug.Log("Not enough parts for receiving a message.");
+            return;
+        }
+
+        var listener = UniWebViewNativeListener.GetListener(parts[0]);
+        if (listener == null) {
+            return;
+        }
+        
+        MethodInfo methodInfo = typeof(UniWebViewNativeListener).GetMethod(parts[1]);
+        if (methodInfo == null) {
+            Debug.Log("Cannot find correct method to invoke: " + parts[1]);
+            return;
+        }
+        
+        var leftLength = parts.Length - 2;
+        var left = new string[leftLength];
+        for (int i = 0; i < leftLength; i++) {
+            left[i] = parts[i + 2];
+        }
+        methodInfo.Invoke(listener, new object[] { string.Join("@", left) });
+    }
+}
+
+// #endif

Assets/UniWebView/Interface/UniWebViewAndroidStaticListener.cs.meta

@@ -0,0 +1,13 @@
+fileFormatVersion: 2
+guid: 2704cf8e127d541f1888d96429308645
+timeCreated: 1514387178
+licenseType: Store
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Interface/UniWebViewCocoa.cs

@@ -0,0 +1,898 @@
+//
+//  UniWebViewInterface.cs
+//  Created by Wang Wei(@onevcat) on 2017-04-11.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+#if (UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX || UNITY_IOS) && !UNITY_EDITOR_WIN && !UNITY_EDITOR_LINUX
+
+using UnityEngine;
+using System;
+using System.Runtime.InteropServices;
+using AOT;
+using System.Reflection;
+
+public class UniWebViewInterface {
+    
+    private const string StaticListenerName = "UniWebView-static";
+    
+    static UniWebViewInterface() {
+        ConnectMessageSender();
+        RegisterChannel();
+    }
+
+    delegate void UnitySendMessageDelegate(IntPtr objectName, IntPtr methodName, IntPtr parameter);
+
+    private const string DllLib =
+    #if UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX
+        "UniWebView";
+    #else
+        "__Internal";
+    #endif
+
+    private static bool correctPlatform = 
+    #if UNITY_EDITOR_OSX
+        Application.platform == RuntimePlatform.OSXEditor || 
+        Application.platform ==  RuntimePlatform.IPhonePlayer || // Support for Device Simulator package
+        Application.platform ==  RuntimePlatform.Android;        // Support for Device Simulator package
+    #elif UNITY_STANDALONE_OSX
+        Application.platform == RuntimePlatform.OSXPlayer;
+    #else
+        Application.platform == RuntimePlatform.IPhonePlayer;
+    #endif
+
+    [DllImport(DllLib)]
+    private static extern void uv_connectMessageSender(
+        [MarshalAs(UnmanagedType.FunctionPtr)] UnitySendMessageDelegate sendMessageDelegate
+    );
+    static void ConnectMessageSender() {
+        UniWebViewLogger.Instance.Info("Connecting to native side message sender.");
+        CheckPlatform();
+        uv_connectMessageSender(SendMessage);
+    }
+
+    [MonoPInvokeCallback(typeof(UnitySendMessageDelegate))]
+    private static void SendMessage(IntPtr namePtr, IntPtr methodPtr, IntPtr parameterPtr) {
+        string name = Marshal.PtrToStringAuto(namePtr);
+        string method = Marshal.PtrToStringAuto(methodPtr);
+        string parameters = Marshal.PtrToStringAuto(parameterPtr);
+
+        UniWebViewLogger.Instance.Verbose(
+            "Received message sent from native. Name: " + name + " Method: " + method + " Params: " + parameters
+        );
+
+        if (name == StaticListenerName) {
+            MethodInfo methodInfo = typeof(UniWebViewStaticListener)
+                .GetMethod(method, BindingFlags.Static | BindingFlags.Public);
+            methodInfo.Invoke(null, new object[] { parameters });
+            return;
+        }
+        
+        var listener = UniWebViewNativeListener.GetListener(name);
+        if (listener) {
+            MethodInfo methodInfo = typeof(UniWebViewNativeListener).GetMethod(method);
+            if (methodInfo != null) {
+                methodInfo.Invoke(listener, new object[] { parameters });
+            }
+        }
+    }
+    
+    delegate string ChannelMethodDelegate(IntPtr namePtr, IntPtr methodPtr, IntPtr parameterPtr);
+    
+    [DllImport(DllLib)]
+    private static extern void uv_registerChannel([MarshalAs(UnmanagedType.FunctionPtr)] ChannelMethodDelegate channel);
+    public static void RegisterChannel() {
+        UniWebViewLogger.Instance.Info("Connecting to native side method channel.");
+        CheckPlatform();
+        uv_registerChannel(ChannelFunc);
+    }
+
+    [MonoPInvokeCallback(typeof(ChannelMethodDelegate))]
+    private static string ChannelFunc(IntPtr namePtr, IntPtr methodPtr, IntPtr parameterPtr) {
+        string name = Marshal.PtrToStringAuto(namePtr);
+        string method = Marshal.PtrToStringAuto(methodPtr);
+        string parameters = Marshal.PtrToStringAuto(parameterPtr);
+
+        UniWebViewLogger.Instance.Verbose("ChannelFunc invoked by native side. Name: " + name + " Method: " 
+                                          + method + " Params: " + parameters);
+        return UniWebViewChannelMethodManager.Instance.InvokeMethod(name, method, parameters);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setLogLevel(int level);
+    public static void SetLogLevel(int level) {
+        CheckPlatform();
+        uv_setLogLevel(level);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_init(string name, int x, int y, int width, int height);
+    public static void Init(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+        if (String.IsNullOrEmpty(name)) {
+            return;
+        }
+        uv_init(name, x, y, width, height);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_destroy(string name);
+    public static void Destroy(string name) {
+        CheckPlatform();
+        uv_destroy(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_load(string name, string url, bool skipEncoding, string readAccessURL);
+    public static void Load(string name, string url, bool skipEncoding, string readAccessURL) {
+        CheckPlatform();
+        uv_load(name, url, skipEncoding, readAccessURL);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_loadHTMLString(string name, string html, string baseUrl, bool skipEncoding);
+    public static void LoadHTMLString(string name, string html, string baseUrl, bool skipEncoding) {
+        CheckPlatform();
+        uv_loadHTMLString(name, html, baseUrl, skipEncoding);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_reload(string name);
+    public static void Reload(string name) {
+        CheckPlatform();
+        uv_reload(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_stop(string name);
+    public static void Stop(string name) {
+        CheckPlatform();
+        uv_stop(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern string uv_getUrl(string name);
+    public static string GetUrl(string name) {
+        CheckPlatform();
+        return uv_getUrl(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setFrame(string name, int x, int y, int width, int height);
+    public static void SetFrame(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+        uv_setFrame(name, x, y, width, height);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setPosition(string name, int x, int y);
+    public static void SetPosition(string name, int x, int y) {
+        CheckPlatform();
+        uv_setPosition(name, x, y);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setSize(string name, int width, int height);
+    public static void SetSize(string name, int width, int height) {
+        CheckPlatform();
+        uv_setSize(name, width, height);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_show(string name, bool fade, int edge, float duration, string identifier);
+    public static bool Show(string name, bool fade, int edge, float duration, bool useAsync, string identifier) {
+        CheckPlatform();
+        return uv_show(name, fade, edge, duration, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_hide(string name, bool fade, int edge, float duration, string identifier);
+    public static bool Hide(string name, bool fade, int edge, float duration, bool useAsync, string identifier) {
+        CheckPlatform();
+        return uv_hide(name, fade, edge, duration, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_animateTo(
+        string name, int x, int y, int width, int height, float duration, float delay, string identifier
+    );
+    public static bool AnimateTo(
+        string name, int x, int y, int width, int height, float duration, float delay, string identifier) 
+    {
+        CheckPlatform();
+        return uv_animateTo(name, x, y, width, height, duration, delay, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_addJavaScript(string name, string jsString, string identifier);
+    public static void AddJavaScript(string name, string jsString, string identifier) {
+        CheckPlatform();
+        uv_addJavaScript(name, jsString, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_evaluateJavaScript(string name, string jsString, string identifier);
+    public static void EvaluateJavaScript(string name, string jsString, string identifier) {
+        CheckPlatform();
+        uv_evaluateJavaScript(name, jsString, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_addUrlScheme(string name, string scheme);
+    public static void AddUrlScheme(string name, string scheme) {
+        CheckPlatform();
+        uv_addUrlScheme(name, scheme);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeUrlScheme(string name, string scheme);
+    public static void RemoveUrlScheme(string name, string scheme) {
+        CheckPlatform();
+        uv_removeUrlScheme(name, scheme);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_addSslExceptionDomain(string name, string domain);
+    public static void AddSslExceptionDomain(string name, string domain) {
+        CheckPlatform();
+        uv_addSslExceptionDomain(name, domain);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeSslExceptionDomain(string name, string domain);
+    public static void RemoveSslExceptionDomain(string name, string domain) {
+        CheckPlatform();
+        uv_removeSslExceptionDomain(name, domain);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setHeaderField(string name, string key, string value);
+    public static void SetHeaderField(string name, string key, string value) {
+        CheckPlatform();
+        uv_setHeaderField(name, key, value);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setUserAgent(string name, string userAgent);
+    public static void SetUserAgent(string name, string userAgent) {
+        CheckPlatform();
+        uv_setUserAgent(name, userAgent);
+    }
+
+    [DllImport(DllLib)]
+    private static extern string uv_getUserAgent(string name);
+    public static string GetUserAgent(string name) {
+        CheckPlatform();
+        return uv_getUserAgent(name);
+    }
+
+
+    [DllImport(DllLib)]
+    private static extern void uv_setContentInsetAdjustmentBehavior(string name, int behavior);
+    public static void SetContentInsetAdjustmentBehavior(
+        string name, UniWebViewContentInsetAdjustmentBehavior behavior
+    ) 
+    {
+        CheckPlatform();
+        uv_setContentInsetAdjustmentBehavior(name, (int)behavior);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowAutoPlay(bool flag);
+    public static void SetAllowAutoPlay(bool flag) {
+        CheckPlatform();
+        uv_setAllowAutoPlay(flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowInlinePlay(bool flag);
+    public static void SetAllowInlinePlay(bool flag) {
+        CheckPlatform();
+        uv_setAllowInlinePlay(flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowFileAccess(string name, bool flag);
+    public static void SetAllowFileAccess(string name, bool flag) {
+        CheckPlatform();
+        uv_setAllowFileAccess(name, flag);
+    }
+        [DllImport(DllLib)]
+    private static extern void uv_setAllowFileAccessFromFileURLs(string name, bool flag);
+    public static void SetAllowFileAccessFromFileURLs(string name, bool flag) {
+        CheckPlatform();
+        uv_setAllowFileAccessFromFileURLs(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowUniversalAccessFromFileURLs(bool flag);
+    public static void SetAllowUniversalAccessFromFileURLs(bool flag) {
+        CheckPlatform();
+        uv_setAllowUniversalAccessFromFileURLs(flag);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setForwardWebConsoleToNativeOutput(bool flag);
+    public static void SetForwardWebConsoleToNativeOutput(bool flag) {
+        CheckPlatform();
+        uv_setForwardWebConsoleToNativeOutput(flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowJavaScriptOpenWindow(bool flag);
+    public static void SetAllowJavaScriptOpenWindow(bool flag) {
+        CheckPlatform();
+        uv_setAllowJavaScriptOpenWindow(flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setJavaScriptEnabled(bool flag);
+    public static void SetJavaScriptEnabled(bool flag) {
+        CheckPlatform();
+        uv_setJavaScriptEnabled(flag);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setLimitsNavigationsToAppBoundDomains(bool flag);
+    public static void SetLimitsNavigationsToAppBoundDomains(bool flag) {
+        CheckPlatform();
+        uv_setLimitsNavigationsToAppBoundDomains(flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_cleanCache(string name);
+    public static void CleanCache(string name) {
+        CheckPlatform();
+        uv_cleanCache(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setCacheMode(string name, int mode);
+    public static void SetCacheMode(string name, int mode) {
+        CheckPlatform();
+        uv_setCacheMode(name, mode);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_clearCookies();
+    public static void ClearCookies() {
+        CheckPlatform();
+        uv_clearCookies();
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setCookie(string url, string cookie, bool skipEncoding);
+    public static void SetCookie(string url, string cookie, bool skipEncoding) {
+        CheckPlatform();
+        uv_setCookie(url, cookie, skipEncoding);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeCookies(string url, bool skipEncoding);
+    public static void RemoveCookies(string url, bool skipEncoding) {
+        CheckPlatform();
+        uv_removeCookies(url, skipEncoding);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeCookie(string url, string key, bool skipEncoding);
+    public static void RemoveCookie(string url, string key, bool skipEncoding) {
+        CheckPlatform();
+        uv_removeCookie(url, key, skipEncoding);
+    }
+
+    [DllImport(DllLib)]
+    private static extern string uv_getCookie(string url, string key, bool skipEncoding);
+    public static string GetCookie(string url, string key, bool skipEncoding) {
+        CheckPlatform();
+        return uv_getCookie(url, key, skipEncoding);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_clearHttpAuthUsernamePasswordHost(string host, string realm);
+    public static void ClearHttpAuthUsernamePassword(string host, string realm) {
+        CheckPlatform();
+        uv_clearHttpAuthUsernamePasswordHost(host, realm);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setBackgroundColor(string name, float r, float g, float b, float a);
+    public static void SetBackgroundColor(string name, float r, float g, float b, float a) {
+        CheckPlatform();
+        uv_setBackgroundColor(name, r, g, b, a);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setWebViewAlpha(string name, float alpha);
+    public static void SetWebViewAlpha(string name, float alpha) {
+        CheckPlatform();
+        uv_setWebViewAlpha(name, alpha);
+    }
+
+    [DllImport(DllLib)]
+    private static extern float uv_getWebViewAlpha(string name);
+    public static float GetWebViewAlpha(string name) {
+        CheckPlatform();
+        return uv_getWebViewAlpha(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setShowSpinnerWhileLoading(string name, bool show);
+    public static void SetShowSpinnerWhileLoading(string name, bool show) {
+        CheckPlatform();
+        uv_setShowSpinnerWhileLoading(name, show);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setSpinnerText(string name, string text);
+    public static void SetSpinnerText(string name, string text) {
+        CheckPlatform();
+        uv_setSpinnerText(name, text);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowUserDismissSpinnerByGesture(string name, bool flag);
+    public static void SetAllowUserDismissSpinnerByGesture(string name, bool flag) {
+        CheckPlatform();
+        uv_setAllowUserDismissSpinnerByGesture(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_showSpinner(string name);
+    public static void ShowSpinner(string name) {
+        CheckPlatform();
+        uv_showSpinner(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_hideSpinner(string name);
+    public static void HideSpinner(string name) {
+        CheckPlatform();
+        uv_hideSpinner(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_canGoBack(string name);
+    public static bool CanGoBack(string name) {
+        CheckPlatform();
+        return uv_canGoBack(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_canGoForward(string name);
+    public static bool CanGoForward(string name) {
+        CheckPlatform();
+        return uv_canGoForward(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_goBack(string name);
+    public static void GoBack(string name) {
+        CheckPlatform();
+        uv_goBack(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_goForward(string name);
+    public static void GoForward(string name) {
+        CheckPlatform();
+        uv_goForward(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setOpenLinksInExternalBrowser(string name, bool flag);
+    public static void SetOpenLinksInExternalBrowser(string name, bool flag) {
+        CheckPlatform();
+        uv_setOpenLinksInExternalBrowser(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setHorizontalScrollBarEnabled(string name, bool enabled);
+    public static void SetHorizontalScrollBarEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setHorizontalScrollBarEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setVerticalScrollBarEnabled(string name, bool enabled);
+    public static void SetVerticalScrollBarEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setVerticalScrollBarEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setBouncesEnabled(string name, bool enabled);
+    public static void SetBouncesEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setBouncesEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setZoomEnabled(string name, bool enabled);
+    public static void SetZoomEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setZoomEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setWindowUserResizeEnabled(string name, bool enabled);
+    public static void SetWindowUserResizeEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setWindowUserResizeEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setUserInteractionEnabled(string name, bool enabled);
+    public static void SetUserInteractionEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setUserInteractionEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setTransparencyClickingThroughEnabled(string name, bool enabled);
+    public static void SetTransparencyClickingThroughEnabled(string name, bool enabled) {
+        CheckPlatform();
+        uv_setTransparencyClickingThroughEnabled(name, enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setWebContentsDebuggingEnabled(bool enabled);
+    public static void SetWebContentsDebuggingEnabled(bool enabled) {
+        CheckPlatform();
+        uv_setWebContentsDebuggingEnabled(enabled);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowBackForwardNavigationGestures(string name, bool flag);
+    public static void SetAllowBackForwardNavigationGestures(string name, bool flag) {
+        CheckPlatform();
+        uv_setAllowBackForwardNavigationGestures(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowHTTPAuthPopUpWindow(string name, bool flag);
+    public static void SetAllowHTTPAuthPopUpWindow(string name, bool flag) {
+        CheckPlatform();
+        uv_setAllowHTTPAuthPopUpWindow(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_print(string name);
+    public static void Print(string name) {
+        CheckPlatform();
+        uv_print(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_captureSnapshot(string name, string fileName);
+    public static void CaptureSnapshot(string name, string fileName) {
+        CheckPlatform();
+        uv_captureSnapshot(name, fileName);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_scrollTo(string name, int x, int y, bool animated);
+    public static void ScrollTo(string name, int x, int y, bool animated) {
+        CheckPlatform();
+        uv_scrollTo(name, x, y, animated);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setCalloutEnabled(string name, bool flag);
+    public static void SetCalloutEnabled(string name, bool flag) {
+        CheckPlatform();
+        uv_setCalloutEnabled(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setSupportMultipleWindows(string name, bool enabled, bool allowJavaScriptOpening);
+    public static void SetSupportMultipleWindows(string name, bool enabled, bool allowJavaScriptOpening) {
+        CheckPlatform();
+        uv_setSupportMultipleWindows(name, enabled, allowJavaScriptOpening);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setDragInteractionEnabled(string name, bool flag);
+    public static void SetDragInteractionEnabled(string name, bool flag) {
+        CheckPlatform();
+        uv_setDragInteractionEnabled(name, flag);
+    }
+
+    [DllImport(DllLib)]
+    private static extern float uv_nativeScreenWidth();
+    public static float NativeScreenWidth() {
+        #if UNITY_EDITOR_OSX
+        return Screen.width;
+        #else
+        return uv_nativeScreenWidth();
+        #endif
+    }
+
+    [DllImport(DllLib)]
+    private static extern float uv_nativeScreenHeight();
+    public static float NativeScreenHeight() {
+        #if UNITY_EDITOR_OSX
+        return Screen.height;
+        #else
+        return uv_nativeScreenHeight();
+        #endif
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_addDownloadURL(string name, string urlString, int type);
+    public static void AddDownloadURL(string name, string urlString, int type) {
+        CheckPlatform();
+        uv_addDownloadURL(name, urlString, type);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeDownloadURL(string name, string urlString, int type);
+    public static void RemoveDownloadURL(string name, string urlString, int type) {
+        CheckPlatform();
+        uv_removeDownloadURL(name, urlString, type);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_addDownloadMIMEType(string name, string MIMEType, int type);
+    public static void AddDownloadMIMEType(string name, string MIMEType, int type) {
+        CheckPlatform();
+        uv_addDownloadMIMEType(name, MIMEType, type);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_removeDownloadMIMETypes(string name, string MIMEType, int type);
+    public static void RemoveDownloadMIMETypes(string name, string MIMEType, int type) {
+        CheckPlatform();
+        uv_removeDownloadMIMETypes(name, MIMEType, type);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowUserEditFileNameBeforeDownloading(string name, bool allowed);
+    public static void SetAllowUserEditFileNameBeforeDownloading(string name, bool allowed) {
+        CheckPlatform();
+        uv_setAllowUserEditFileNameBeforeDownloading(name, allowed);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setAllowUserChooseActionAfterDownloading(string name, bool allowed);
+    public static void SetAllowUserChooseActionAfterDownloading(string name, bool allowed) {
+        CheckPlatform();
+        uv_setAllowUserChooseActionAfterDownloading(name, allowed);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_safeBrowsingInit(string name, string url);
+    public static void SafeBrowsingInit(string name, string url) {
+        CheckPlatform();
+        if (String.IsNullOrEmpty(name)) {
+            return;
+        }
+        uv_safeBrowsingInit(name, url);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_safeBrowsingShow(string name);
+    public static void SafeBrowsingShow(string name) {
+        CheckPlatform();
+        uv_safeBrowsingShow(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_safeBrowsingSetToolbarColor(string name, float r, float g, float b);
+    public static void SafeBrowsingSetToolbarColor(string name, float r, float g, float b) {
+        CheckPlatform();
+        uv_safeBrowsingSetToolbarColor(name, r, g, b);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_safeBrowsingSetToolbarItemColor(string name, float r, float g, float b);
+    public static void SafeBrowsingSetToolbarItemColor(string name, float r, float g, float b) {
+        CheckPlatform();
+        uv_safeBrowsingSetToolbarItemColor(name, r, g, b);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_safeBrowsingDismiss(string name);
+    public static void SafeBrowsingDismiss(string name) {
+        CheckPlatform();
+        uv_safeBrowsingDismiss(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern bool uv_authenticationIsSupported();
+    public static bool IsAuthenticationIsSupported() {
+        CheckPlatform();
+        return uv_authenticationIsSupported();
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_authenticationInit(string name, string url, string scheme);
+    public static void AuthenticationInit(string name, string url, string scheme) {
+        CheckPlatform();
+        uv_authenticationInit(name, url, scheme);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_authenticationStart(string name);
+    public static void AuthenticationStart(string name) {
+        CheckPlatform();
+        uv_authenticationStart(name);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_authenticationSetPrivateMode(string name, bool flag);
+    public static void AuthenticationSetPrivateMode(string name, bool flag) {
+        CheckPlatform();
+        uv_authenticationSetPrivateMode(name, flag);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setShowEmbeddedToolbar(string name, bool show);
+    public static void SetShowEmbeddedToolbar(string name, bool show) {
+        CheckPlatform();
+        uv_setShowEmbeddedToolbar(name, show);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarOnTop(string name, bool top);
+    public static void SetEmbeddedToolbarOnTop(string name, bool top) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarOnTop(name, top);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarDoneButtonText(string name, string text);
+    public static void SetEmbeddedToolbarDoneButtonText(string name, string text) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarDoneButtonText(name, text);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarGoBackButtonText(string name, string text);
+    public static void SetEmbeddedToolbarGoBackButtonText(string name, string text) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarGoBackButtonText(name, text);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarGoForwardButtonText(string name, string text);
+    public static void SetEmbeddedToolbarGoForwardButtonText(string name, string text) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarGoForwardButtonText(name, text);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarTitleText(string name, string text);
+    public static void SetEmbeddedToolbarTitleText(string name, string text) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarTitleText(name, text);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarBackgroundColor(string name, float r, float g, float b, float a);
+    public static void SetEmbeddedToolbarBackgroundColor(string name, Color color) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarBackgroundColor(name, color.r, color.g, color.b, color.a);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarButtonTextColor(string name, float r, float g, float b, float a);
+    public static void SetEmbeddedToolbarButtonTextColor(string name, Color color) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarButtonTextColor(name, color.r, color.g, color.b, color.a);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarTitleTextColor(string name, float r, float g, float b, float a);
+    public static void SetEmbeddedToolbarTitleTextColor(string name, Color color) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarTitleTextColor(name, color.r, color.g, color.b, color.a);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setEmbeddedToolbarNavigationButtonsShow(string name, bool show);
+    public static void SetEmeddedToolbarNavigationButtonsShow(string name, bool show) {
+        CheckPlatform();
+        uv_setEmbeddedToolbarNavigationButtonsShow(name, show);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_startSnapshotForRendering(string name, string identifier);
+    public static void StartSnapshotForRendering(string name, string identifier) {
+        CheckPlatform();
+        uv_startSnapshotForRendering(name, identifier);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_stopSnapshotForRendering(string name);
+    public static void StopSnapshotForRendering(string name) {
+        CheckPlatform();
+        uv_stopSnapshotForRendering(name);
+    }
+    
+    [DllImport(DllLib)]
+    private static extern IntPtr uv_getRenderedData(string name, int x, int y, int width, int height, out int length);
+    public static byte[] GetRenderedData(string name, int x, int y, int width, int height) {
+        CheckPlatform();
+
+        IntPtr dataPtr = uv_getRenderedData(name, x, y, width, height, out var length);
+        
+        byte[] managedData = new byte[length];
+        Marshal.Copy(dataPtr, managedData, 0, length);
+        
+        return managedData;
+    }
+
+    #region Deprecated
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setShowToolbar(string name, bool show, bool animated, bool onTop, bool adjustInset);
+    public static void SetShowToolbar(string name, bool show, bool animated, bool onTop, bool adjustInset) {
+        CheckPlatform();
+        uv_setShowToolbar(name, show, animated, onTop, adjustInset);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setShowToolbarNavigationButtons(string name, bool show);
+    public static void SetShowToolbarNavigationButtons(string name, bool show) {
+        CheckPlatform();
+        uv_setShowToolbarNavigationButtons(name, show);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setToolbarDoneButtonText(string name, string text);
+    public static void SetToolbarDoneButtonText(string name, string text) {
+        CheckPlatform();
+        uv_setToolbarDoneButtonText(name, text);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setGoBackButtonText(string name, string text);
+    public static void SetToolbarGoBackButtonText(string name, string text) { 
+        CheckPlatform(); 
+        uv_setGoBackButtonText(name, text);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setGoForwardButtonText(string name, string text);
+    public static void SetToolbarGoForwardButtonText(string name, string text) { 
+        CheckPlatform();
+        uv_setGoForwardButtonText(name, text);
+    }
+    
+    
+    [DllImport(DllLib)]
+    private static extern void uv_setToolbarTintColor(string name, float r, float g, float b);
+    public static void SetToolbarTintColor(string name, float r, float g, float b) {
+        CheckPlatform();
+        uv_setToolbarTintColor(name, r, g, b);
+    }
+
+    [DllImport(DllLib)]
+    private static extern void uv_setToolbarTextColor(string name, float r, float g, float b);
+    public static void SetToolbarTextColor(string name, float r, float g, float b) {
+        CheckPlatform();
+        uv_setToolbarTextColor(name, r, g, b);
+    }
+    
+    #endregion
+
+    public static void CheckPlatform() {
+        if (!correctPlatform) {
+            throw new System.InvalidOperationException(
+                "Method can only be performed on correct platform. Current: " + Application.platform
+            );
+        }
+    }
+}
+#endif

Assets/UniWebView/Interface/UniWebViewCocoa.cs.meta

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+licenseType: Store
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Assets/UniWebView/Interface/UniWebViewPlaceholder.cs

@@ -0,0 +1,113 @@
+#if UNITY_EDITOR_WIN || UNITY_EDITOR_LINUX || (!UNITY_EDITOR_OSX && !UNITY_STANDALONE_OSX && !UNITY_IOS && !UNITY_ANDROID)
+
+using UnityEngine;
+
+public class UniWebViewInterface {
+    
+    private static bool alreadyLoggedWarning = false;
+
+    public static void SetLogLevel(int level) { CheckPlatform(); }
+    public static void Init(string name, int x, int y, int width, int height) { CheckPlatform(); }
+    public static void Destroy(string name) { CheckPlatform(); }
+    public static void Load(string name, string url, bool skipEncoding, string readAccessURL) { CheckPlatform(); }
+    public static void LoadHTMLString(string name, string html, string baseUrl, bool skipEncoding) { CheckPlatform(); }
+    public static void Reload(string name) { CheckPlatform(); }
+    public static void Stop(string name) { CheckPlatform(); }
+    public static string GetUrl(string name) { CheckPlatform(); return ""; }
+    public static void SetFrame(string name, int x, int y, int width, int height) { CheckPlatform(); }
+    public static void SetPosition(string name, int x, int y) { CheckPlatform(); }
+    public static void SetSize(string name, int width, int height) { CheckPlatform(); }
+    public static bool Show(string name, bool fade, int edge, float duration, bool useAsync, string identifier) { CheckPlatform(); return false; }
+    public static bool Hide(string name, bool fade, int edge, float duration, bool useAsync, string identifier) { CheckPlatform(); return false; }
+    public static bool AnimateTo(string name, int x, int y, int width, int height, float duration, float delay, string identifier) { CheckPlatform(); return false; }
+    public static void AddJavaScript(string name, string jsString, string identifier) { CheckPlatform(); }
+    public static void EvaluateJavaScript(string name, string jsString, string identifier) { CheckPlatform(); }
+    public static void AddUrlScheme(string name, string scheme) { CheckPlatform(); }
+    public static void RemoveUrlScheme(string name, string scheme) { CheckPlatform(); }
+    public static void AddSslExceptionDomain(string name, string domain) { CheckPlatform(); }
+    public static void RemoveSslExceptionDomain(string name, string domain) { CheckPlatform(); }
+    public static void SetHeaderField(string name, string key, string value) { CheckPlatform(); }
+    public static void SetUserAgent(string name, string userAgent) { CheckPlatform(); }
+    public static string GetUserAgent(string name) { CheckPlatform(); return ""; }
+    public static void SetAllowAutoPlay(bool flag) { CheckPlatform(); }
+    public static void SetAllowInlinePlay(bool flag) { CheckPlatform(); }
+    public static void SetAllowJavaScriptOpenWindow(bool flag) { CheckPlatform(); }
+    public static void SetForwardWebConsoleToNativeOutput(bool flag) { CheckPlatform(); }
+    public static void SetAllowFileAccess(string name, bool flag) { CheckPlatform(); }
+    public static void SetAllowFileAccessFromFileURLs(string name, bool flag) { CheckPlatform(); }
+    public static void SetAllowUniversalAccessFromFileURLs(bool flag) { CheckPlatform(); }
+    public static void SetJavaScriptEnabled(bool flag) { CheckPlatform(); }
+    public static void SetLimitsNavigationsToAppBoundDomains(bool enabled) { CheckPlatform(); }
+    public static void CleanCache(string name) { CheckPlatform(); }
+    public static void SetCacheMode(string name, int mode) { CheckPlatform(); }
+    public static void ClearCookies() { CheckPlatform(); }
+    public static void SetCookie(string url, string cookie, bool skipEncoding) { CheckPlatform(); }
+    public static void RemoveCookies(string url, bool skipEncoding) { CheckPlatform(); }
+    public static void RemoveCookie(string url, string key, bool skipEncoding) { CheckPlatform(); }
+    public static string GetCookie(string url, string key, bool skipEncoding) { CheckPlatform(); return ""; }
+    public static void ClearHttpAuthUsernamePassword(string host, string realm) { CheckPlatform(); }
+    public static void SetBackgroundColor(string name, float r, float g, float b, float a) { CheckPlatform(); }
+    public static void SetWebViewAlpha(string name, float alpha) { CheckPlatform(); }
+    public static float GetWebViewAlpha(string name) { CheckPlatform(); return 0.0f; }
+    public static void SetShowSpinnerWhileLoading(string name, bool show) { CheckPlatform(); }
+    public static void SetSpinnerText(string name, string text) { CheckPlatform(); }
+    public static void SetAllowUserDismissSpinnerByGesture(string name, bool flag) { CheckPlatform(); }
+    public static void ShowSpinner(string name) { CheckPlatform(); }
+    public static void HideSpinner(string name) { CheckPlatform(); }
+    public static bool CanGoBack(string name) { CheckPlatform(); return false; }
+    public static bool CanGoForward(string name) { CheckPlatform(); return false; }
+    public static void GoBack(string name) { CheckPlatform(); }
+    public static void GoForward(string name) { CheckPlatform(); }
+    public static void SetOpenLinksInExternalBrowser(string name, bool flag) { CheckPlatform(); }
+    public static void SetHorizontalScrollBarEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetVerticalScrollBarEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetBouncesEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetZoomEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetShowToolbar(string name, bool show, bool animated, bool onTop, bool adjustInset) { CheckPlatform(); }
+    public static void SetToolbarDoneButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetToolbarGoBackButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetToolbarGoForwardButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetToolbarTintColor(string name, float r, float g, float b) { CheckPlatform(); }
+    public static void SetToolbarTextColor(string name, float r, float g, float b) { CheckPlatform(); }
+    public static void SetUserInteractionEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetTransparencyClickingThroughEnabled(string name, bool enabled) { CheckPlatform(); }
+    public static void SetWebContentsDebuggingEnabled(bool enabled) { CheckPlatform(); }
+    public static void SetAllowHTTPAuthPopUpWindow(string name, bool flag) { CheckPlatform(); }
+    public static void SetAllowUserEditFileNameBeforeDownloading(string name, bool allowed) { CheckPlatform(); }
+    public static void Print(string name) { CheckPlatform(); }
+    public static void CaptureSnapshot(string name, string filename) { CheckPlatform(); }
+    public static void SetCalloutEnabled(string name, bool flag) { CheckPlatform(); }
+    public static void SetSupportMultipleWindows(string name, bool enabled, bool allowJavaScriptOpening) { CheckPlatform(); }
+    public static void SetDragInteractionEnabled(string name, bool flag) { CheckPlatform(); }
+    public static void ScrollTo(string name, int x, int y, bool animated) { CheckPlatform(); }
+    public static float NativeScreenWidth() { CheckPlatform(); return 0.0f; }
+    public static float NativeScreenHeight() { CheckPlatform(); return 0.0f; }
+    public static void SafeBrowsingInit(string name, string url) { CheckPlatform(); }
+    public static void SafeBrowsingSetToolbarColor(string name, float r, float g, float b) { CheckPlatform(); }
+    public static void SafeBrowsingShow(string name) { CheckPlatform(); }
+    public static bool IsAuthenticationIsSupported() { CheckPlatform(); return false; }
+    public static void AuthenticationInit(string name, string url, string scheme) { CheckPlatform(); }
+    public static void AuthenticationStart(string name) { CheckPlatform(); }
+    public static void AuthenticationSetPrivateMode(string name, bool enabled) { CheckPlatform(); }
+    public static void SetShowEmbeddedToolbar(string name, bool show) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarOnTop(string name, bool top) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarDoneButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarGoBackButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarGoForwardButtonText(string name, string text) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarTitleText(string name, string text) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarBackgroundColor(string name, Color color) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarButtonTextColor(string name, Color color) { CheckPlatform(); }
+    public static void SetEmbeddedToolbarTitleTextColor(string name, Color color) { CheckPlatform(); }
+    public static void SetEmeddedToolbarNavigationButtonsShow(string name, bool show) { CheckPlatform(); }
+    public static void StartSnapshotForRendering(string name, string identifier) { CheckPlatform(); }
+    public static void StopSnapshotForRendering(string name) { CheckPlatform(); }
+    public static byte[] GetRenderedData(string name, int x, int y, int width, int height) { CheckPlatform(); return null; }
+
+    public static void CheckPlatform() {
+        if (!alreadyLoggedWarning) {
+            alreadyLoggedWarning = true;
+            Debug.LogWarning("UniWebView only supports iOS/Android/macOS Editor. You current platform " + Application.platform + " is not supported.");
+        }
+    }
+}
+#endif

Assets/UniWebView/Interface/UniWebViewPlaceholder.cs.meta

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Assets/UniWebView/README.txt

@@ -0,0 +1,30 @@
+# UniWebView
+
+Thank you for purchasing UniWebView.
+
+UniWebView is a Unity3D plugin built on native iOS/Android technology. It helps your users to enjoy web content and 
+interact with your game through the web views.
+
+## Documentation
+
+To get started, please visit our documentation site: [https://docs.uniwebview.com](https://docs.uniwebview.com). You
+could find step-by-step guides on how to import UniWebView to your project, as well as some basic usage of this asset. 
+You could also find a full script reference on the same site in this page: [https://docs.uniwebview.com/api/](https://docs.uniwebview.com/api/).
+
+## Upgrading
+
+All purchased customers could get all updates for the same major version for free. Please check the place you have 
+purchased this asset to see whether there is an update or not. A release note is also contained in this asset, in the
+"CHANGELOG.md" file. You could also find the same version list in [this page](https://docs.uniwebview.com/release-note).
+
+## Getting Support
+
+For frequently asked questions, we have a page to answer them. If you encountered any problems while using UniWebView, 
+we strongly suggest to visit the [FAQ page](https://docs.uniwebview.com/guide/faq.html) first. Also feel free to
+[submit a ticket](https://onevcat.atlassian.net/servicedesk/customer/portal/2) if you cannot find a solution, we will 
+do our best to get you out!
+
+## Other
+
+For more information, please visit the [official web site](https://uniwebview.com) of UniWebView, or contact us through 
+a ticket.

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Assets/UniWebView/Script/External/MiniJSON.cs

@@ -0,0 +1,551 @@
+/*
+ * Copyright (c) 2013 Calvin Rien
+ *
+ * Based on the JSON parser by Patrick van Bergen
+ * http://techblog.procurios.nl/k/618/news/view/14605/14863/How-do-I-write-my-own-parser-for-JSON.html
+ *
+ * Simplified it so that it doesn't throw exceptions
+ * and can be used in Unity iPhone with maximum code stripping.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace UniWebViewExternal {
+    // Example usage:
+    //
+    //  using UnityEngine;
+    //  using System.Collections;
+    //  using System.Collection
+    //
+    //
+    //
+    //
+    //
+    //
+    //
+    //
+    //
+    //
+    //
+    //   s.Generic;
+    //  using MiniJSON;
+    //
+    //  public class MiniJSONTest : MonoBehaviour {
+    //      void Start () {
+    //          var jsonString = "{ \"array\": [1.44,2,3], " +
+    //                          "\"object\": {\"key1\":\"value1\", \"key2\":256}, " +
+    //                          "\"string\": \"The quick brown fox \\\"jumps\\\" over the lazy dog \", " +
+    //                          "\"unicode\": \"\\u3041 Men\u00fa sesi\u00f3n\", " +
+    //                          "\"int\": 65536, " +
+    //                          "\"float\": 3.1415926, " +
+    //                          "\"bool\": true, " +
+    //                          "\"null\": null }";
+    //
+    //          var dict = Json.Deserialize(jsonString) as Dictionary<string,object>;
+    //
+    //          Debug.Log("deserialized: " + dict.GetType());
+    //          Debug.Log("dict['array'][0]: " + ((List<object>) dict["array"])[0]);
+    //          Debug.Log("dict['string']: " + (string) dict["string"]);
+    //          Debug.Log("dict['float']: " + (double) dict["float"]); // floats come out as doubles
+    //          Debug.Log("dict['int']: " + (long) dict["int"]); // ints come out as longs
+    //          Debug.Log("dict['unicode']: " + (string) dict["unicode"]);
+    //
+    //          var str = Json.Serialize(dict);
+    //
+    //          Debug.Log("serialized: " + str);
+    //      }
+    //  }
+
+    /// <summary>
+    /// This class encodes and decodes JSON strings.
+    /// Spec. details, see http://www.json.org/
+    ///
+    /// JSON uses Arrays and Objects. These correspond here to the datatypes IList and IDictionary.
+    /// All numbers are parsed to doubles.
+    /// </summary>
+    public static class Json {
+        /// <summary>
+        /// Parses the string json into a value
+        /// </summary>
+        /// <param name="json">A JSON string.</param>
+        /// <returns>An List&lt;object&gt;, a Dictionary&lt;string, object&gt;, a double, an integer,a string, null, true, or false</returns>
+        public static object Deserialize(string json) {
+            // save the string for debug information
+            if (json == null) {
+                return null;
+            }
+
+            return Parser.Parse(json);
+        }
+
+        sealed class Parser : IDisposable {
+            const string WORD_BREAK = "{}[],:\"";
+
+            public static bool IsWordBreak(char c) {
+                return Char.IsWhiteSpace(c) || WORD_BREAK.IndexOf(c) != -1;
+            }
+
+            enum TOKEN {
+                NONE,
+                CURLY_OPEN,
+                CURLY_CLOSE,
+                SQUARED_OPEN,
+                SQUARED_CLOSE,
+                COLON,
+                COMMA,
+                STRING,
+                NUMBER,
+                TRUE,
+                FALSE,
+                NULL
+            };
+
+            StringReader json;
+
+            Parser(string jsonString) {
+                json = new StringReader(jsonString);
+            }
+
+            public static object Parse(string jsonString) {
+                using (var instance = new Parser(jsonString)) {
+                    return instance.ParseValue();
+                }
+            }
+
+            public void Dispose() {
+                json.Dispose();
+                json = null;
+            }
+
+            Dictionary<string, object> ParseObject() {
+                Dictionary<string, object> table = new Dictionary<string, object>();
+
+                // ditch opening brace
+                json.Read();
+
+                // {
+                while (true) {
+                    switch (NextToken) {
+                    case TOKEN.NONE:
+                        return null;
+                    case TOKEN.COMMA:
+                        continue;
+                    case TOKEN.CURLY_CLOSE:
+                        return table;
+                    default:
+                        // name
+                        string name = ParseString();
+                        if (name == null) {
+                            return null;
+                        }
+
+                        // :
+                        if (NextToken != TOKEN.COLON) {
+                            return null;
+                        }
+                        // ditch the colon
+                        json.Read();
+
+                        // value
+                        table[name] = ParseValue();
+                        break;
+                    }
+                }
+            }
+
+            List<object> ParseArray() {
+                List<object> array = new List<object>();
+
+                // ditch opening bracket
+                json.Read();
+
+                // [
+                var parsing = true;
+                while (parsing) {
+                    TOKEN nextToken = NextToken;
+
+                    switch (nextToken) {
+                    case TOKEN.NONE:
+                        return null;
+                    case TOKEN.COMMA:
+                        continue;
+                    case TOKEN.SQUARED_CLOSE:
+                        parsing = false;
+                        break;
+                    default:
+                        object value = ParseByToken(nextToken);
+
+                        array.Add(value);
+                        break;
+                    }
+                }
+
+                return array;
+            }
+
+            object ParseValue() {
+                TOKEN nextToken = NextToken;
+                return ParseByToken(nextToken);
+            }
+
+            object ParseByToken(TOKEN token) {
+                switch (token) {
+                case TOKEN.STRING:
+                    return ParseString();
+                case TOKEN.NUMBER:
+                    return ParseNumber();
+                case TOKEN.CURLY_OPEN:
+                    return ParseObject();
+                case TOKEN.SQUARED_OPEN:
+                    return ParseArray();
+                case TOKEN.TRUE:
+                    return true;
+                case TOKEN.FALSE:
+                    return false;
+                case TOKEN.NULL:
+                    return null;
+                default:
+                    return null;
+                }
+            }
+
+            string ParseString() {
+                StringBuilder s = new StringBuilder();
+                char c;
+
+                // ditch opening quote
+                json.Read();
+
+                bool parsing = true;
+                while (parsing) {
+
+                    if (json.Peek() == -1) {
+                        parsing = false;
+                        break;
+                    }
+
+                    c = NextChar;
+                    switch (c) {
+                    case '"':
+                        parsing = false;
+                        break;
+                    case '\\':
+                        if (json.Peek() == -1) {
+                            parsing = false;
+                            break;
+                        }
+
+                        c = NextChar;
+                        switch (c) {
+                        case '"':
+                        case '\\':
+                        case '/':
+                            s.Append(c);
+                            break;
+                        case 'b':
+                            s.Append('\b');
+                            break;
+                        case 'f':
+                            s.Append('\f');
+                            break;
+                        case 'n':
+                            s.Append('\n');
+                            break;
+                        case 'r':
+                            s.Append('\r');
+                            break;
+                        case 't':
+                            s.Append('\t');
+                            break;
+                        case 'u':
+                            var hex = new char[4];
+
+                            for (int i=0; i< 4; i++) {
+                                hex[i] = NextChar;
+                            }
+
+                            s.Append((char) Convert.ToInt32(new string(hex), 16));
+                            break;
+                        }
+                        break;
+                    default:
+                        s.Append(c);
+                        break;
+                    }
+                }
+
+                return s.ToString();
+            }
+
+            object ParseNumber() {
+                string number = NextWord;
+
+                if (number.IndexOf('.') == -1) {
+                    long parsedInt;
+                    Int64.TryParse(number, out parsedInt);
+                    return parsedInt;
+                }
+
+                double parsedDouble;
+                Double.TryParse(number, out parsedDouble);
+                return parsedDouble;
+            }
+
+            void EatWhitespace() {
+                while (Char.IsWhiteSpace(PeekChar)) {
+                    json.Read();
+
+                    if (json.Peek() == -1) {
+                        break;
+                    }
+                }
+            }
+
+            char PeekChar => Convert.ToChar(json.Peek());
+
+            char NextChar => Convert.ToChar(json.Read());
+
+            string NextWord {
+                get {
+                    StringBuilder word = new StringBuilder();
+
+                    while (!IsWordBreak(PeekChar)) {
+                        word.Append(NextChar);
+
+                        if (json.Peek() == -1) {
+                            break;
+                        }
+                    }
+
+                    return word.ToString();
+                }
+            }
+
+            TOKEN NextToken {
+                get {
+                    EatWhitespace();
+
+                    if (json.Peek() == -1) {
+                        return TOKEN.NONE;
+                    }
+
+                    switch (PeekChar) {
+                    case '{':
+                        return TOKEN.CURLY_OPEN;
+                    case '}':
+                        json.Read();
+                        return TOKEN.CURLY_CLOSE;
+                    case '[':
+                        return TOKEN.SQUARED_OPEN;
+                    case ']':
+                        json.Read();
+                        return TOKEN.SQUARED_CLOSE;
+                    case ',':
+                        json.Read();
+                        return TOKEN.COMMA;
+                    case '"':
+                        return TOKEN.STRING;
+                    case ':':
+                        return TOKEN.COLON;
+                    case '0':
+                    case '1':
+                    case '2':
+                    case '3':
+                    case '4':
+                    case '5':
+                    case '6':
+                    case '7':
+                    case '8':
+                    case '9':
+                    case '-':
+                        return TOKEN.NUMBER;
+                    }
+
+                    switch (NextWord) {
+                    case "false":
+                        return TOKEN.FALSE;
+                    case "true":
+                        return TOKEN.TRUE;
+                    case "null":
+                        return TOKEN.NULL;
+                    }
+
+                    return TOKEN.NONE;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Converts a IDictionary / IList object or a simple type (string, int, etc.) into a JSON string
+        /// </summary>
+        /// <param name="json">A Dictionary&lt;string, object&gt; / List&lt;object&gt;</param>
+        /// <returns>A JSON encoded string, or null if object 'json' is not serializable</returns>
+        public static string Serialize(object obj) {
+            return Serializer.Serialize(obj);
+        }
+
+        sealed class Serializer {
+            StringBuilder builder;
+
+            Serializer() {
+                builder = new StringBuilder();
+            }
+
+            public static string Serialize(object obj) {
+                var instance = new Serializer();
+
+                instance.SerializeValue(obj);
+
+                return instance.builder.ToString();
+            }
+
+            void SerializeValue(object value) {
+                IList asList;
+                IDictionary asDict;
+                string asStr;
+
+                if (value == null) {
+                    builder.Append("null");
+                } else if ((asStr = value as string) != null) {
+                    SerializeString(asStr);
+                } else if (value is bool) {
+                    builder.Append((bool) value ? "true" : "false");
+                } else if ((asList = value as IList) != null) {
+                    SerializeArray(asList);
+                } else if ((asDict = value as IDictionary) != null) {
+                    SerializeObject(asDict);
+                } else if (value is char) {
+                    SerializeString(new string((char) value, 1));
+                } else {
+                    SerializeOther(value);
+                }
+            }
+
+            void SerializeObject(IDictionary obj) {
+                bool first = true;
+
+                builder.Append('{');
+
+                foreach (object e in obj.Keys) {
+                    if (!first) {
+                        builder.Append(',');
+                    }
+
+                    SerializeString(e.ToString());
+                    builder.Append(':');
+
+                    SerializeValue(obj[e]);
+
+                    first = false;
+                }
+
+                builder.Append('}');
+            }
+
+            void SerializeArray(IList anArray) {
+                builder.Append('[');
+
+                bool first = true;
+
+                foreach (object obj in anArray) {
+                    if (!first) {
+                        builder.Append(',');
+                    }
+
+                    SerializeValue(obj);
+
+                    first = false;
+                }
+
+                builder.Append(']');
+            }
+
+            void SerializeString(string str) {
+                builder.Append('\"');
+
+                char[] charArray = str.ToCharArray();
+                foreach (var c in charArray) {
+                    switch (c) {
+                    case '"':
+                        builder.Append("\\\"");
+                        break;
+                    case '\\':
+                        builder.Append("\\\\");
+                        break;
+                    case '\b':
+                        builder.Append("\\b");
+                        break;
+                    case '\f':
+                        builder.Append("\\f");
+                        break;
+                    case '\n':
+                        builder.Append("\\n");
+                        break;
+                    case '\r':
+                        builder.Append("\\r");
+                        break;
+                    case '\t':
+                        builder.Append("\\t");
+                        break;
+                    default:
+                        int codepoint = Convert.ToInt32(c);
+                        if ((codepoint >= 32) && (codepoint <= 126)) {
+                            builder.Append(c);
+                        } else {
+                            builder.Append("\\u");
+                            builder.Append(codepoint.ToString("x4"));
+                        }
+                        break;
+                    }
+                }
+
+                builder.Append('\"');
+            }
+
+            void SerializeOther(object value) {
+                // NOTE: decimals lose precision during serialization.
+                // They always have, I'm just letting you know.
+                // Previously floats and doubles lost precision too.
+                if (value is float) {
+                    builder.Append(((float) value).ToString("R"));
+                } else if (value is int
+                    || value is uint
+                    || value is long
+                    || value is sbyte
+                    || value is byte
+                    || value is short
+                    || value is ushort
+                    || value is ulong) {
+                    builder.Append(value);
+                } else if (value is double
+                    || value is decimal) {
+                    builder.Append(Convert.ToDouble(value).ToString("R"));
+                } else {
+                    SerializeString(value.ToString());
+                }
+            }
+        }
+    }
+}

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Assets/UniWebView/Script/UniWebViewAuthentication.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationCommonFlow.cs

@@ -0,0 +1,94 @@
+//
+//  UniWebViewAuthenticationCommonFlow.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System.Collections.Generic;
+using UnityEngine;
+
+/// <summary>
+/// Abstract class and general control for other authentication flows. This class determines the global behaviors of the 
+/// authentication flow, such as whether to start authentication as soon as the script `Start`s, and whether to use private
+/// mode to authenticate the user.
+
+/// This is a super and abstract class for all concrete auth flow. You are not expected to use this class directly.
+/// Instead, to start a customized auth flow, you can use the `UniWebViewAuthenticationFlowCustomize` class.
+/// </summary>
+public abstract class UniWebViewAuthenticationCommonFlow: MonoBehaviour {
+    /// <summary>
+    /// Whether to start authentication as soon as the script `Start`s.
+    /// </summary>
+    public bool authorizeOnStart;
+    /// <summary>
+    /// Whether to use private mode to authenticate the user. If `true` and the device supports, the authentication
+    /// will begin under the incognito mode.
+    ///
+    /// On iOS, this works on iOS 13 and later.
+    ///
+    /// On Android, it depends on the Chrome version and might require users to enable the incognito mode (and support
+    /// for third-party use) in Chrome's settings. Check settings with `chrome://flags/#cct-incognito` and
+    /// `chrome://flags/#cct-incognito-available-to-third-party` in Chrome to see the current status.
+    /// </summary>
+    public bool privateMode;
+    
+    // Security. Store the state.
+    private string state;
+    // Security. Store the code challenge verifier. 
+
+    protected string CodeVerify { get; private set; }
+
+    public void Start() {
+        if (authorizeOnStart) {
+            StartAuthenticationFlow();
+        }
+    }
+    
+    /// <summary>
+    /// Subclass should override this method to start the authentication flow. Usually it starts
+    /// a `UniWebViewAuthenticationFlow`. But you can also choose whatever you need to do. 
+    /// </summary>
+    public abstract void StartAuthenticationFlow();
+
+    /// <summary>
+    /// Subclass should override this method to start the authentication flow. Usually it starts
+    /// a Unity Web Request against the authentication flow's token entry point to refresh the token.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token.</param>
+    public abstract void StartRefreshTokenFlow(string refreshToken);
+
+    // Child classes are expected to call this method to request a `state` (and store it for later check) if the 
+    // `state` verification is enabled.
+    protected string GenerateAndStoreState() {
+        state = UniWebViewAuthenticationUtils.GenerateRandomBase64URLString();
+        return state;
+    }
+
+    // Child classes are expected to call this method to request a `code_challenge`. Later when exchanging the access
+    // token, the `code_verifier` will be used to verify the `code_challenge`. Subclass can read it from `CodeVerify`.
+    protected string GenerateCodeChallengeAndStoreCodeVerify(UniWebViewAuthenticationPKCE method) {
+        CodeVerify = UniWebViewAuthenticationUtils.GenerateCodeVerifier();
+        return UniWebViewAuthenticationUtils.CalculateCodeChallenge(CodeVerify, method);
+    }
+    
+    // Perform verifying for `state`.
+    protected void VerifyState(Dictionary<string, string> parameters, string key = "state") {
+        if (state == null) {
+            throw AuthenticationResponseException.InvalidState;
+        }
+        if (!parameters.TryGetValue(key, out var stateInResponse) || state != stateInResponse) {
+            throw AuthenticationResponseException.InvalidState;
+        }
+    }
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationCommonFlow.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlow.cs

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+//
+//  UniWebViewAuthenticationFlow.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections;
+using UnityEngine.Networking;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// Interface for implementing a custom authentication flow. An authentication flow, in UniWebView, usually a "code" based
+/// OAuth 2.0 flow, contains a standard set of steps:
+/// 
+/// 1. User is navigated to a web page that requires authentication;
+/// 2. A temporary code is generated by service provider and provided to client by a redirect URL with customized scheme.
+/// 3. Client requests an access token using the temporary code by performing an "access token" exchange request.
+///
+/// To use the common flow, any customize authentication flow must implement this interface and becomes a subclass of
+/// UniWebViewAuthenticationCommonFlow.
+/// </summary>
+/// <typeparam name="TTokenType"></typeparam>
+public interface IUniWebViewAuthenticationFlow<TTokenType>
+{
+    /// <summary>
+    /// Returns the redirect URL that is used to redirect the user after authenticated. This is used as the `redirect_uri`
+    /// parameter when navigating user to the authentication page.
+    ///
+    /// Usually this is a URL with customize scheme that later service provider may call. It takes intermediate code in its
+    /// query and can be used to open the current app in client. The native side of UniWebView will catch and handle it,
+    /// then send it to Unity side as the result of `UniWebViewAuthenticationSession`.
+    /// </summary>
+    /// <returns>
+    /// The redirect URL set in the OAuth settings.
+    /// </returns>
+    string GetCallbackUrl();
+    
+    /// <summary>
+    /// Returns the config of the authentication flow. It usually defines the authentication requests entry points.
+    /// </summary>
+    /// <returns>The config object of an authentication flow.</returns>
+    UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration();
+    
+    /// <summary>
+    /// Returns a dictionary contains the parameters that are used to perform the authentication request.
+    /// The key value pairs in the dictionary are used to construct the query string of the authentication request.
+    ///
+    /// This usually contains fields like `client_id`, `redirect_uri`, `response_type`, etc.
+    /// </summary>
+    /// <returns>The dictionary indicates parameters that are used to perform the authentication request.</returns>
+    Dictionary<string, string> GetAuthenticationUriArguments();
+    
+    /// <summary>
+    /// Returns a dictionary contains the parameters that are used to perform the access token exchange request.
+    /// The key value pairs in the dictionary are used to construct the HTTP form body of the access token exchange request.
+    /// </summary>
+    /// <param name="authResponse">
+    /// The response from authentication request. If the authentication succeeds, it is
+    /// usually a custom scheme URL with a `code` query as its parameter. Base on this, you could construct the body of the
+    /// access token exchange request.
+    /// </param>
+    /// <returns>
+    /// The dictionary indicates parameters that are used to perform the access token exchange request.
+    /// </returns>
+    Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse);
+
+    /// <summary>
+    /// Returns a dictionary contains the parameters that are used to perform the access token refresh request.
+    /// The key value pairs in the dictionary are used to construct the HTTP form body of the access token refresh request.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token should be used to perform the refresh request.</param>
+    /// <returns>
+    /// The dictionary indicates parameters that are used to perform the access token refresh request.
+    /// </returns>
+    Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken);
+
+    /// <summary>
+    /// Returns the strong-typed token for the authentication process.
+    ///
+    /// When the token exchange request finishes without problem, the response body will be passed to this method and
+    /// any conforming class should construct the token object from the response body.
+    /// </summary>
+    /// <param name="exchangeResponse">
+    /// The body response of the access token exchange request. Usually it contains the desired `access_token` and other
+    /// necessary fields to describe the authenticated result.
+    /// </param>
+    /// <returns>
+    /// A token object with `TToken` type that represents the authenticated result.
+    /// </returns>
+    TTokenType GenerateTokenFromExchangeResponse(string exchangeResponse);
+    
+    /// <summary>
+    /// Called when the authentication flow succeeds and a valid token is generated.
+    /// </summary>
+    UnityEvent<TTokenType> OnAuthenticationFinished { get; }
+
+    /// <summary>
+    /// Called when any error (including user cancellation) happens during the authentication flow.
+    /// </summary>
+    UnityEvent<long, string> OnAuthenticationErrored { get; }
+    
+    /// <summary>
+    /// Called when the access token refresh request finishes and a valid refreshed token is generated.
+    /// </summary>
+    UnityEvent<TTokenType> OnRefreshTokenFinished { get; }
+
+    /// <summary>
+    /// Called when any error happens during the access token refresh flow.
+    /// </summary>
+    UnityEvent<long, string> OnRefreshTokenErrored { get; }
+}
+
+/// <summary>
+/// The manager object of an authentication flow. This defines and runs the common flow of an authentication process
+/// with `code` response type. 
+/// </summary>
+/// <typeparam name="TTokenType">The responsive token type expected for this authentication flow.</typeparam>
+public class UniWebViewAuthenticationFlow<TTokenType> {
+    
+    private IUniWebViewAuthenticationFlow<TTokenType> service;
+
+    public UniWebViewAuthenticationFlow(
+        IUniWebViewAuthenticationFlow<TTokenType> service
+    ) 
+    {
+        this.service = service;
+    }
+
+    /// <summary>
+    /// Start the authentication flow.
+    /// </summary>
+    public void StartAuth()
+    {
+        var callbackUri = new Uri(service.GetCallbackUrl());
+        var authUrl = GetAuthUrl();
+        var session = UniWebViewAuthenticationSession.Create(authUrl, callbackUri.Scheme);
+        var flow = service as UniWebViewAuthenticationCommonFlow;
+        if (flow != null && flow.privateMode) {
+            session.SetPrivateMode(true);
+        }
+        session.OnAuthenticationFinished += (_, resultUrl) =>  {
+            UniWebViewLogger.Instance.Verbose("Auth flow received callback url: " + resultUrl);
+            ExchangeToken(resultUrl);
+        };
+
+        session.OnAuthenticationErrorReceived += (_, errorCode, message) => {
+            ExchangeTokenErrored(errorCode, message);
+        };
+        
+        UniWebViewLogger.Instance.Verbose("Starting auth flow with url: " + authUrl + "; Callback scheme: " + callbackUri.Scheme);
+        session.Start();
+    }
+
+    private void ExchangeToken(string response) {
+        try {
+            var args = service.GetAccessTokenRequestParameters(response);
+            var request = GetTokenRequest(args);
+            MonoBehaviour context = (MonoBehaviour)service;
+            context.StartCoroutine(SendExchangeTokenRequest(request));
+        } catch (Exception e) {
+            var message = e.Message;
+            var code = -1;
+            if (e is AuthenticationResponseException ex) {
+                code = ex.Code;
+            }
+            UniWebViewLogger.Instance.Critical("Exception on exchange token response: " + e + ". Code: " + code + ". Message: " + message);
+            ExchangeTokenErrored(code, message);
+        }
+    }
+
+    /// <summary>
+    /// Refresh the access token with the given refresh token.
+    /// </summary>
+    /// <param name="refreshToken"></param>
+    public void RefreshToken(string refreshToken) {
+        try {
+            var args = service.GetRefreshTokenRequestParameters(refreshToken);
+            var request = GetTokenRequest(args);
+            MonoBehaviour context = (MonoBehaviour)service;
+            context.StartCoroutine(SendRefreshTokenRequest(request));
+        } catch (Exception e) {
+            var message = e.Message;
+            var code = -1;
+            if (e is AuthenticationResponseException ex) {
+                code = ex.Code;
+            }
+            UniWebViewLogger.Instance.Critical("Exception on refresh token response: " + e + ". Code: " + code + ". Message: " + message);
+            RefreshTokenErrored(code, message);
+        }
+    }
+
+    private string GetAuthUrl() {
+        var builder = new UriBuilder(service.GetAuthenticationConfiguration().authorizationEndpoint);
+        var query = new Dictionary<string, string>();
+        foreach (var kv in service.GetAuthenticationUriArguments()) {
+            query.Add(kv.Key, kv.Value);
+        }
+        builder.Query = UniWebViewAuthenticationUtils.CreateQueryString(query);
+        return builder.ToString();
+    }
+
+    private UnityWebRequest GetTokenRequest(Dictionary<string, string>args) {
+        var builder = new UriBuilder(service.GetAuthenticationConfiguration().tokenEndpoint);
+        var form = new WWWForm();
+        foreach (var kv in args) {
+            form.AddField(kv.Key, kv.Value);
+        }
+        return UnityWebRequest.Post(builder.ToString(), form);
+    }
+    
+    private IEnumerator SendExchangeTokenRequest(UnityWebRequest request) {
+        return SendTokenRequest(request, ExchangeTokenFinished, ExchangeTokenErrored);
+    }
+
+    private IEnumerator SendRefreshTokenRequest(UnityWebRequest request) {
+        return SendTokenRequest(request, RefreshTokenFinished, RefreshTokenErrored);
+    }
+
+    private IEnumerator SendTokenRequest(UnityWebRequest request, Action<TTokenType> finishAction, Action<long, string>errorAction)
+    {
+        using var www = request;
+        yield return www.SendWebRequest();
+        if (www.result != UnityWebRequest.Result.Success) {
+            string errorMessage = null;
+            string errorBody = null;
+            if (www.error != null) {
+                errorMessage = www.error;
+            }
+            if (www.downloadHandler != null && www.downloadHandler.text != null) {
+                errorBody = www.downloadHandler.text;
+            }
+            UniWebViewLogger.Instance.Critical("Failed to get access token. Error: " + errorMessage + ". " + errorBody);
+            errorAction(www.responseCode, errorBody ?? errorMessage);
+        } else {
+            var responseText = www.downloadHandler.text;
+            UniWebViewLogger.Instance.Info("Token exchange request succeeded. Response: " + responseText);
+            try {
+                var token = service.GenerateTokenFromExchangeResponse(www.downloadHandler.text);
+                finishAction(token);
+            } catch (Exception e) {
+                var message = e.Message;
+                var code = -1;
+                if (e is AuthenticationResponseException ex) {
+                    code = ex.Code;
+                }
+                UniWebViewLogger.Instance.Critical(
+                    "Exception on parsing token response: " + e + ". Code: " + code + ". Message: " + 
+                    message + ". Response: " + responseText);
+                errorAction(code, message);
+            }
+        }
+    }
+
+    private void ExchangeTokenFinished(TTokenType token) {
+        if (service.OnAuthenticationFinished != null) {
+            service.OnAuthenticationFinished.Invoke(token);            
+        }
+        service = null;
+    }
+    
+    private void ExchangeTokenErrored(long code, string message) {
+        UniWebViewLogger.Instance.Info("Auth flow errored: " + code + ". Detail: " + message);
+        if (service.OnAuthenticationErrored != null) {
+            service.OnAuthenticationErrored.Invoke(code, message);
+        }
+        service = null;
+    }
+    
+    private void RefreshTokenFinished(TTokenType token) {
+        if (service.OnRefreshTokenFinished != null) {
+            service.OnRefreshTokenFinished.Invoke(token);
+        }
+        service = null;
+    }
+    
+    private void RefreshTokenErrored(long code, string message) {
+        UniWebViewLogger.Instance.Info("Refresh flow errored: " + code + ". Detail: " + message);
+        if (service.OnRefreshTokenErrored != null) {
+            service.OnRefreshTokenErrored.Invoke(code, message);
+        }
+        service = null;
+    }
+}
+
+/// <summary>
+/// The configuration object of an authentication flow. This defines the authentication entry points.
+/// </summary>
+public class UniWebViewAuthenticationConfiguration {
+    internal readonly string authorizationEndpoint;
+    internal readonly string tokenEndpoint;
+
+    /// <summary>
+    /// Creates a new authentication configuration object with the given entry points.
+    /// </summary>
+    /// <param name="authorizationEndpoint">The entry point to navigate end user to for authentication.</param>
+    /// <param name="tokenEndpoint">The entry point which is used to exchange the received code to a valid access token.</param>
+    public UniWebViewAuthenticationConfiguration(string authorizationEndpoint, string tokenEndpoint)  {
+        this.authorizationEndpoint = authorizationEndpoint;
+        this.tokenEndpoint = tokenEndpoint;
+    }
+}
+
+/// <summary>
+/// The exception thrown when the authentication flow fails when handling the response.
+/// </summary>
+public class AuthenticationResponseException : Exception {
+    /// <summary>
+    /// Exception error code to identify the error type. See the static instance of this class to know detail of error codes.
+    /// </summary>
+    public int Code { get; }
+
+    /// <summary>
+    /// Creates an authentication response exception.
+    /// </summary>
+    /// <param name="code">The error code.</param>
+    /// <param name="message">A message that contains error detail.</param>
+    public AuthenticationResponseException(int code, string message): base(message) {
+        Code = code;
+    }
+    
+    /// <summary>
+    /// An unexpected authentication callback is received. Error code 7001. 
+    /// </summary>
+    public static AuthenticationResponseException UnexpectedAuthCallbackUrl 
+        = new AuthenticationResponseException(7001, "The received callback url is not expected.");
+    
+    /// <summary>
+    /// The `state` value in the callback url is not the same as the one in the request. Error code 7002.
+    /// </summary>
+    public static AuthenticationResponseException InvalidState 
+        = new AuthenticationResponseException(7002, "The `state` is not valid.");
+
+    /// <summary>
+    /// The response is not a valid one. It does not contains a `code` field or cannot be parsed. Error code 7003.
+    /// </summary>
+    /// <param name="query">The query will be delivered as a part of error message.</param>
+    /// <returns>The created response exception that can be thrown out and handled by package user.</returns>
+    public static AuthenticationResponseException InvalidResponse(string query) {
+        return new AuthenticationResponseException(7003, "The service auth response is not valid: " + query);
+    }
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlow.cs.meta

@@ -0,0 +1,11 @@
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+  defaultReferences: []
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+  icon: {instanceID: 0}
+  userData: 
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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowCustomize.cs

@@ -0,0 +1,230 @@
+//
+//  UniWebViewAuthenticationFlowCustomize.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A customizable authentication flow behavior.
+/// </summary>
+/// <remarks>
+/// Besides of the predefined authentication flows, such as Twitter (`UniWebViewAuthenticationFlowTwitter`) or Google
+/// (`UniWebViewAuthenticationFlowGoogle`), this class allows you to determine the details of the authentication flow,
+/// such as entry points, grant types, scopes and more. But similar to other target-specified flows, it follows the same
+/// OAuth 2.0 code auth pattern.
+///
+/// If you need to support other authentication flows for the platform targets other than the predefined ones, you can
+/// use this class and set all necessary parameters. It runs the standard OAuth 2.0 flow and gives out a
+/// `UniWebViewAuthenticationStandardToken` as the result.
+///
+/// If you need to support authentication flows other than `code` based OAuth 2.0, try to derive from
+/// `UniWebViewAuthenticationCommonFlow` and implement `IUniWebViewAuthenticationFlow` interface, or even use the 
+/// underneath `UniWebViewAuthenticationSession` to get a highly customizable flow.
+/// 
+/// </remarks>
+public class UniWebViewAuthenticationFlowCustomize : UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationStandardToken> {
+
+    /// <summary>
+    /// The config object which defines the basic information of the authentication flow.
+    /// </summary>
+    public UniWebViewAuthenticationFlowCustomizeConfig config = new UniWebViewAuthenticationFlowCustomizeConfig();
+
+    /// <summary>
+    /// The client Id of your OAuth application.
+    /// </summary>
+    public string clientId = "";
+
+    /// <summary>
+    /// The redirect URI of your OAuth application. The service provider is expected to call this URI to pass back the
+    /// authorization code. It should be something also set to your OAuth application.
+    ///
+    /// Also remember to add it to the "Auth Callback Urls" field in UniWebView's preference panel. 
+    /// </summary>
+    public string redirectUri = "";
+    
+    /// <summary>
+    /// The scope of the authentication request.
+    /// </summary>
+    public string scope = "";
+
+    /// <summary>
+    /// The optional object which defines some optional parameters of the authentication flow, such as whether supports
+    /// `state` or `PKCE`.
+    /// </summary>
+    public UniWebViewAuthenticationFlowCustomizeOptional optional;
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationStandardToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationStandardToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return new UniWebViewAuthenticationConfiguration(
+            config.authorizationEndpoint, 
+            config.tokenEndpoint
+        );
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual string GetCallbackUrl() {
+        return redirectUri;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "redirect_uri", redirectUri },
+            { "scope", scope },
+            { "response_type", config.responseType }
+        };
+        if (optional != null) {
+            if (optional.enableState) {
+                var state = GenerateAndStoreState();
+                authorizeArgs.Add("state", state);
+            }
+
+            if (optional.PKCESupport != UniWebViewAuthenticationPKCE.None) {
+                var codeChallenge = GenerateCodeChallengeAndStoreCodeVerify(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge", codeChallenge);
+
+                var method = UniWebViewAuthenticationUtils.ConvertPKCEToString(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge_method", method);
+            }
+        }
+
+        return authorizeArgs;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        if (!authResponse.StartsWith(redirectUri, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        if (optional != null && optional.enableState) {
+            VerifyState(response);
+        }
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "code", code },
+            { "redirect_uri", redirectUri },
+            { "grant_type", config.grantType },
+        };
+        if (CodeVerify != null) {
+            parameters.Add("code_verifier", CodeVerify);
+        }
+        if (optional != null && !String.IsNullOrEmpty(optional.clientSecret)) {
+            parameters.Add("client_secret", optional.clientSecret);
+        }
+
+        return parameters;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "refresh_token", refreshToken },
+            { "grant_type", config.refreshTokenGrantType }
+        };
+        if (optional != null && !String.IsNullOrEmpty(optional.clientSecret)) {
+            parameters.Add("client_secret", optional.clientSecret);
+        }
+        return parameters;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public virtual UniWebViewAuthenticationStandardToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return UniWebViewAuthenticationTokenFactory<UniWebViewAuthenticationStandardToken>.Parse(exchangeResponse);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationStandardToken> OnAuthenticationFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationStandardToken> OnRefreshTokenFinished { get; set; }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+}
+
+[Serializable]
+public class UniWebViewAuthenticationFlowCustomizeConfig {
+    public string authorizationEndpoint = "";
+    public string tokenEndpoint = "";
+    public string responseType = "code";
+    public string grantType = "authorization_code";
+
+    public string refreshTokenGrantType = "refresh_token";
+}
+
+[Serializable]
+public class UniWebViewAuthenticationFlowCustomizeOptional {
+    public UniWebViewAuthenticationPKCE PKCESupport = UniWebViewAuthenticationPKCE.None; 
+    public bool enableState = false;
+    public string clientSecret = "";
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowCustomize.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowDiscord.cs

@@ -0,0 +1,222 @@
+//
+//  UniWebViewAuthenticationFlowDiscord.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A predefined authentication flow for Discord.
+/// 
+/// This implementation follows the flow described here:
+/// https://discord.com/developers/docs/topics/oauth2
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowDiscord : UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationDiscordToken> {
+    /// <summary>
+    /// The client ID of your Discord application.
+    /// </summary>
+    public string clientId = "";
+    
+    /// <summary>
+    /// The client secret of your Discord application.
+    /// </summary>
+    public string clientSecret = "";
+    
+    /// <summary>
+    /// The redirect URI of this Discord application.
+    /// </summary>
+    public string redirectUri = "";
+    
+    /// <summary>
+    /// The scope string of all your required scopes.
+    /// </summary>
+    public string scope = "";
+    
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowDiscordOptional optional;
+
+    private const string responseType = "code";
+    private const string grantType = "authorization_code";
+
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://discord.com/api/oauth2/authorize", 
+            "https://discord.com/api/oauth2/token"
+        );
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationDiscordToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationDiscordToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return config;
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public string GetCallbackUrl() {
+        return redirectUri;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "redirect_uri", redirectUri },
+            { "scope", scope },
+            { "response_type", responseType }
+        };
+        if (optional != null) {
+            if (optional.enableState) {
+                var state = GenerateAndStoreState();
+                authorizeArgs.Add("state", state);
+            }
+
+            if (optional.PKCESupport != UniWebViewAuthenticationPKCE.None) {
+                var codeChallenge = GenerateCodeChallengeAndStoreCodeVerify(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge", codeChallenge);
+
+                var method = UniWebViewAuthenticationUtils.ConvertPKCEToString(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge_method", method);
+            }
+        }
+
+        return authorizeArgs;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        if (!authResponse.StartsWith(redirectUri, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        if (optional.enableState) {
+            VerifyState(response);
+        }
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "client_secret", clientSecret },
+            { "code", code },
+            { "redirect_uri", redirectUri },
+            { "grant_type", grantType },
+        };
+        if (CodeVerify != null) {
+            parameters.Add("code_verifier", CodeVerify);
+        }
+
+        return parameters;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        return new Dictionary<string, string> {
+            { "client_id", clientId }, 
+            { "client_secret", clientSecret }, 
+            { "refresh_token", refreshToken },
+            { "grant_type", "refresh_token" }
+        };
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationDiscordToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return UniWebViewAuthenticationTokenFactory<UniWebViewAuthenticationDiscordToken>.Parse(exchangeResponse);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationDiscordToken> OnAuthenticationFinished { get; set; }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationDiscordToken> OnRefreshTokenFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for Discord.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowDiscordOptional {
+    /// <summary>
+    /// Whether to enable PKCE when performing authentication. On mobile platforms, this has to be enabled as `S256`,
+    /// otherwise, Discord will reject the authentication request.
+    /// </summary>
+    public UniWebViewAuthenticationPKCE PKCESupport = UniWebViewAuthenticationPKCE.S256;
+    /// <summary>
+    /// Whether to enable the state verification. If enabled, the state will be generated and verified in the
+    /// authentication callback. Default is `true`.
+    /// </summary>
+    public bool enableState = true;
+}
+
+/// <summary>
+/// The token object from Discord. Check `UniWebViewAuthenticationStandardToken` for more.
+/// </summary>
+public class UniWebViewAuthenticationDiscordToken : UniWebViewAuthenticationStandardToken { }
+

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowDiscord.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowFacebook.cs

@@ -0,0 +1,217 @@
+//
+//  UniWebViewAuthenticationFlowFacebook.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A predefined authentication flow for Facebook Login.
+///
+/// It is not a standard OAuth2 flow, and using a plain web view. There once was a policy that Facebook did not allow
+/// any third-party customize authentication flow other than using their official SDK. Recently Facebook started to provide
+/// a so-called manual flow way to perform authentication. But it is originally only for Desktop apps, it is not stable
+/// and not standard.
+///
+/// Facebook suggests "For mobile apps, use the Facebook SDKs for iOS and Android, and follow the separate guides for
+/// these platforms." So on mobile, use this class with your own risk since it might be invalidated or forbidden by
+/// Facebook in the future.
+/// 
+/// This implementation is based on the manual flow described in the following document:
+/// https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow 
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowFacebook: UniWebViewAuthenticationCommonFlow {
+    /// <summary>
+    /// The App ID of your Facebook application
+    /// </summary>
+    public string appId = "";
+    
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowFacebookOptional optional;
+    
+    // The redirect URL should be exactly this one. Web view should inspect the loading of this URL to handle the result.
+    private const string redirectUri = "https://www.facebook.com/connect/login_success.html";
+
+    // Only `token` response type is supported to use Facebook Login as the manual flow.
+    private const string responseType = "token";
+    
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationFacebookToken> OnAuthenticationFinished { get; set; }
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+    
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://www.facebook.com/v14.0/dialog/oauth", 
+            // This `access_token` entry point is in fact not used in current auth model.
+            "https://graph.facebook.com/v14.0/oauth/access_token" 
+        );
+
+    /// <summary>
+    /// Starts the authentication flow.
+    ///
+    /// This flow is executed in a customized web view and it is not a standard OAuth2 flow. 
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var webView = gameObject.AddComponent<UniWebView>();
+        
+        // Facebook login deprecates the Web View login on Android. As a workaround, prevents to be a desktop browser to continue the manual flow.
+        #if UNITY_ANDROID && !UNITY_EDITOR
+        webView.SetUserAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 13_0_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Safari/605.1.15");
+        #endif
+        
+        webView.OnPageFinished += (view, status, url) => {
+            if (status != 200) {
+                if (OnAuthenticationErrored != null) {
+                    OnAuthenticationErrored.Invoke(status, "Error while loading auth page.");
+                }
+                webView.Hide(false, UniWebViewTransitionEdge.Bottom, 0.25f, () => {
+                    Destroy(webView);
+                });
+                return;
+            }
+            
+            if (url.StartsWith(redirectUri)) {
+                UniWebViewLogger.Instance.Info("Received redirect url: " + url);
+                var uri = new Uri(url);
+                var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Fragment);
+                try {
+                    VerifyState(response);
+                    var token = new UniWebViewAuthenticationFacebookToken(url, response);
+                    if (OnAuthenticationFinished != null) {
+                        OnAuthenticationFinished.Invoke(token);
+                    }
+                }
+                catch (Exception e) {
+                    var message = e.Message;
+                    var code = -1;
+                    if (e is AuthenticationResponseException ex) {
+                        code = ex.Code;
+                    }
+
+                    UniWebViewLogger.Instance.Critical("Exception on parsing response: " + e + ". Code: " + code +
+                                                       ". Message: " + message);
+                    if (OnAuthenticationErrored != null) {
+                        OnAuthenticationErrored.Invoke(code, message);
+                    }
+                }
+                finally {
+                    webView.Hide(false, UniWebViewTransitionEdge.Bottom, 0.25f, () => {
+                        Destroy(webView);
+                    });
+                }
+            }
+        };
+        webView.OnLoadingErrorReceived += (view, code, message, payload) => {
+            if (OnAuthenticationErrored != null) {
+                OnAuthenticationErrored.Invoke(code, message);
+            }
+        };
+        webView.Frame = new Rect(0, 0, Screen.width, Screen.height);
+        webView.Load(GetAuthUrl());
+        webView.EmbeddedToolbar.Show();
+        webView.Show(false, UniWebViewTransitionEdge.Bottom, 0.25f);
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        Debug.LogError("Facebook does not provide a refresh token flow when building with the manual flow.");
+        throw new NotImplementedException();
+    }
+
+    private string GetAuthUrl() {
+        var builder = new UriBuilder(config.authorizationEndpoint);
+        var query = new Dictionary<string, string>();
+        foreach (var kv in GetAuthenticationUriArguments()) {
+            query.Add(kv.Key, kv.Value);
+        }
+
+        builder.Query = UniWebViewAuthenticationUtils.CreateQueryString(query);
+        return builder.ToString();
+    }
+
+    private Dictionary<string, string> GetAuthenticationUriArguments() {
+
+        var state = GenerateAndStoreState();
+        var authorizeArgs = new Dictionary<string, string> {
+            { "client_id", appId },
+            { "redirect_uri", redirectUri },
+            { "state", state},
+            { "response_type", responseType }
+        };
+        if (optional != null) {
+            if (!String.IsNullOrEmpty(optional.scope)) {
+                authorizeArgs.Add("scope", optional.scope);
+            }
+        }
+
+        return authorizeArgs;
+    }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for Facebook.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowFacebookOptional {
+    /// <summary>
+    /// The scope string of all your required scopes.
+    /// </summary>
+    public string scope = "";
+}
+
+/// The token object from Facebook. 
+public class UniWebViewAuthenticationFacebookToken {
+    /// <summary>
+    /// The access token received from Facebook Login.
+    /// </summary>
+    public string AccessToken { get; }
+    /// <summary>
+    /// The expiration duration that your app can access requested items of user data.
+    /// </summary>
+    public long DataAccessExpirationTime { get; }
+    /// <summary>
+    /// The expiration duration that the access token is valid for authentication purpose.
+    /// </summary>
+    public long ExpiresIn { get; }
+    /// <summary>
+    /// The raw value of the response of the exchange token request.
+    /// If the predefined fields are not enough, you can parse the raw value to get the extra information.
+    /// </summary>
+    public string RawValue { get; }
+    
+    public UniWebViewAuthenticationFacebookToken(string response, Dictionary<string, string> values) {
+        RawValue = response;
+        AccessToken = values.ContainsKey("access_token") ? values["access_token"] : null ;
+        if (AccessToken == null) {
+            throw AuthenticationResponseException.InvalidResponse(response);
+        }
+        DataAccessExpirationTime = values.ContainsKey("data_access_expiration_time") ? long.Parse(values["data_access_expiration_time"]) : 0;
+        ExpiresIn = values.ContainsKey("expires_in") ? long.Parse(values["expires_in"]) : 0;
+    }
+}
+

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowFacebook.cs.meta

@@ -0,0 +1,11 @@
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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowGitHub.cs

@@ -0,0 +1,255 @@
+//
+//  UniWebViewAuthenticationFlowGitHub.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using UnityEngine;
+using UnityEngine.Events;
+using System.Collections.Generic;
+using System;
+
+/// <summary>
+/// A predefined authentication flow for GitHub.
+///
+/// This implementation follows the flow described here:
+/// https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowGitHub: UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationGitHubToken> {
+    
+    /// <summary>
+    /// The client ID of your GitHub application.
+    /// </summary>
+    public string clientId = "";
+    
+    /// <summary>
+    /// The client secret of your GitHub application.
+    /// </summary>
+    public string clientSecret = "";
+    
+    /// <summary>
+    /// The callback URL of your GitHub application.
+    /// </summary>
+    public string callbackUrl = "";
+    
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowGitHubOptional optional;
+    
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://github.com/login/oauth/authorize", 
+            "https://github.com/login/oauth/access_token"
+        );
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationGitHubToken> OnAuthenticationFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationGitHubToken> OnRefreshTokenFinished { get; set;  }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationGitHubToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationGitHubToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> { { "client_id", clientId } };
+        if (optional != null) {
+            if (!String.IsNullOrEmpty(optional.redirectUri)) {
+                authorizeArgs.Add("redirect_uri", optional.redirectUri);
+            }
+            if (!String.IsNullOrEmpty(optional.login)) {
+                authorizeArgs.Add("login", optional.login);
+            }
+            if (!String.IsNullOrEmpty(optional.scope)) {
+                authorizeArgs.Add("scope", optional.scope);
+            }
+            if (optional.enableState) {
+                var state = GenerateAndStoreState();
+                authorizeArgs.Add("state", state);
+            }
+            if (!optional.allowSignup) { // The default value is true.
+                authorizeArgs.Add("allow_signup", "false");
+            }
+        }
+
+        return authorizeArgs;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public string GetCallbackUrl() {
+        return callbackUrl;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return config;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        if (!authResponse.StartsWith(callbackUrl, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        if (optional.enableState) {
+            VerifyState(response);
+        }
+        var result = new Dictionary<string, string> {
+            { "client_id", clientId }, 
+            { "client_secret", clientSecret }, 
+            { "code", code }
+        };
+        
+        if (optional != null && String.IsNullOrEmpty(optional.redirectUri)) {
+            result.Add("redirect_uri", optional.redirectUri);
+        }
+        return result;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        return new Dictionary<string, string> {
+            { "client_id", clientId }, 
+            { "client_secret", clientSecret }, 
+            { "refresh_token", refreshToken },
+            { "grant_type", "refresh_token" }
+        };
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationGitHubToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return new UniWebViewAuthenticationGitHubToken(exchangeResponse);
+    }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for GitHub.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowGitHubOptional {
+    /// <summary>
+    /// The redirect URI should be used in exchange token request.
+    /// </summary>
+    public string redirectUri = "";
+    /// <summary>
+    /// Suggests a specific account to use for signing in and authorizing the app.
+    /// </summary>
+    public string login = "";
+    /// <summary>
+    /// The scope string of all your required scopes.
+    /// </summary>
+    public string scope = "";
+    /// <summary>
+    /// Whether to enable the state verification. If enabled, the state will be generated and verified in the
+    /// authentication callback.
+    /// </summary>
+    public bool enableState = false;
+    /// <summary>
+    /// Whether unauthenticated users will be offered an option to sign up for GitHub during the OAuth flow.
+    /// </summary>
+    public bool allowSignup = true;
+}
+
+/// <summary>
+/// The token object from GitHub.
+/// </summary>
+public class UniWebViewAuthenticationGitHubToken {
+    /// <summary>The access token retrieved from the service provider.</summary>
+    public string AccessToken { get; }
+    
+    /// <summary>The granted scopes of the token.</summary>
+    public string Scope { get; }
+    
+    /// <summary>The token type. Usually `bearer`.</summary>
+    public string TokenType { get; }
+    
+    /// <summary>The refresh token retrieved from the service provider.</summary>
+    public string RefreshToken { get; }
+    
+    /// <summary>Expiration duration for the refresh token.</summary>
+    public long RefreshTokenExpiresIn { get; }
+    
+    /// <summary>
+    /// The raw value of the response of the exchange token request.
+    /// If the predefined fields are not enough, you can parse the raw value to get the extra information.
+    /// </summary>
+    public string RawValue { get; }
+    
+    public UniWebViewAuthenticationGitHubToken(string result) {
+        RawValue = result;
+        var values = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(result);
+        AccessToken = values.ContainsKey("access_token") ? values["access_token"] : null ;
+        if (AccessToken == null) {
+            throw AuthenticationResponseException.InvalidResponse(result);
+        }
+        Scope = values.ContainsKey("scope") ? values["scope"] : null;
+        TokenType = values.ContainsKey("token_type") ? values["token_type"] : null;
+        RefreshToken = values.ContainsKey("refresh_token") ? values["refresh_token"] : null;
+        RefreshTokenExpiresIn = values.ContainsKey("refresh_token_expires_in") ? long.Parse(values["refresh_token_expires_in"]) : 0;
+    }
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowGitHub.cs.meta

@@ -0,0 +1,11 @@
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+  defaultReferences: []
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+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowGoogle.cs

@@ -0,0 +1,231 @@
+//
+//  UniWebViewAuthenticationFlowGoogle.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A predefined authentication flow for Google Identity.
+///
+/// This implementation follows the flow described here:
+/// https://developers.google.com/identity/protocols/oauth2/native-app
+///
+/// Google authentication flow is a bit different from the other standard authentication flows. Please read the link
+/// above carefully to understand it.
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowGoogle : UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationGoogleToken> {
+    /// <summary>
+    /// The client ID of your Google application.
+    /// </summary>
+    public string clientId = "";
+    
+    /// <summary>
+    /// The redirect URI of your Google application.
+    ///
+    /// It might be something like "com.googleusercontent.apps.${clientId}:${redirect_uri_path}". Be caution that the URI does not
+    /// contain regular double slashes `//`, but should be only one.
+    /// </summary>
+    public string redirectUri = "";
+    
+    /// <summary>
+    /// The scope of your Google application.
+    ///
+    /// It might be some full URL in recent Google services, such as "https://www.googleapis.com/auth/userinfo.profile" 
+    /// </summary>
+    public string scope = "";
+    
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowGoogleOptional optional;
+    
+    private const string responseType = "code";
+    private const string grantType = "authorization_code";
+
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://accounts.google.com/o/oauth2/v2/auth", 
+            "https://oauth2.googleapis.com/token"
+        );
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationGoogleToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationGoogleToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return config;
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public string GetCallbackUrl() {
+        return redirectUri;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "redirect_uri", redirectUri },
+            { "scope", scope },
+            { "response_type", responseType }
+        };
+        if (optional != null) {
+            if (optional.enableState) {
+                var state = GenerateAndStoreState();
+                authorizeArgs.Add("state", state);
+            }
+
+            if (optional.PKCESupport != UniWebViewAuthenticationPKCE.None) {
+                var codeChallenge = GenerateCodeChallengeAndStoreCodeVerify(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge", codeChallenge);
+
+                var method = UniWebViewAuthenticationUtils.ConvertPKCEToString(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge_method", method);
+            }
+
+            if (!String.IsNullOrEmpty(optional.loginHint)) {
+                authorizeArgs.Add("login_hint", optional.loginHint);
+            }
+        }
+
+        return authorizeArgs;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        if (!authResponse.StartsWith(redirectUri, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        if (optional.enableState) {
+            VerifyState(response);
+        }
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "code", code },
+            { "redirect_uri", redirectUri },
+            { "grant_type", grantType },
+        };
+        if (CodeVerify != null) {
+            parameters.Add("code_verifier", CodeVerify);
+        }
+
+        return parameters;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        return new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "refresh_token", refreshToken },
+            { "grant_type", "refresh_token" }
+        };
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationGoogleToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return UniWebViewAuthenticationTokenFactory<UniWebViewAuthenticationGoogleToken>.Parse(exchangeResponse);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationGoogleToken> OnAuthenticationFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationGoogleToken> OnRefreshTokenFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for Google.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowGoogleOptional {
+    /// <summary>
+    /// Whether to enable PKCE when performing authentication. Default is `S256`.
+    /// </summary>
+    public UniWebViewAuthenticationPKCE PKCESupport = UniWebViewAuthenticationPKCE.S256;
+    /// <summary>
+    /// Whether to enable the state verification. If enabled, the state will be generated and verified in the
+    /// authentication callback. Default is `true`.
+    /// </summary>
+    public bool enableState = true;
+    /// <summary>
+    /// If your application knows which user is trying to authenticate, it can use this parameter to provide a hint to
+    /// the Google Authentication Server. 
+    /// </summary>
+    public string loginHint = "";
+}
+
+/// <summary>
+/// The token object from Google. Check `UniWebViewAuthenticationStandardToken` for more.
+/// </summary>
+public class UniWebViewAuthenticationGoogleToken : UniWebViewAuthenticationStandardToken { }
+

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowGoogle.cs.meta

@@ -0,0 +1,3 @@
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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowLine.cs

@@ -0,0 +1,227 @@
+//
+//  UniWebViewAuthenticationFlowLine.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A predefined authentication flow LINE Login.
+///
+/// This implementation follows the flow described here:
+/// https://developers.line.biz/en/reference/line-login/
+///
+/// Google authentication flow is a bit different from the other standard authentication flows. Please read the link
+/// above carefully to understand it.
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowLine : UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationLineToken> {
+    /// <summary>
+    /// The client ID (Channel ID) of your LINE Login application.
+    /// </summary>
+    public string clientId = "";
+    
+    /// <summary>
+    /// The iOS bundle Id you set in LINE developer console.
+    /// </summary>
+    public string iOSBundleId = "";
+    
+    /// <summary>
+    /// The Android package name you set in LINE developer console.
+    /// </summary>
+    public string androidPackageName = "";
+    
+    /// <summary>
+    /// The scope of your LINE application.
+    /// </summary>
+    public string scope = "";
+    
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowLineOptional optional;
+    
+    private const string responseType = "code";
+    private const string grantType = "authorization_code";
+
+    private string RedirectUri {
+        get {
+            if (Application.platform == RuntimePlatform.IPhonePlayer || Application.platform == RuntimePlatform.OSXEditor) {
+                return $"line3rdp.{iOSBundleId}://auth";
+            }
+
+            if (Application.platform == RuntimePlatform.Android) {
+                return "intent://auth#Intent;package=" + androidPackageName + ";scheme=lineauth;end";
+            }
+            UniWebViewLogger.Instance.Critical("Not supported platform for LINE Login.");
+            return "";
+        }
+    }
+
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://access.line.me/oauth2/v2.1/login", 
+            "https://api.line.me/oauth2/v2.1/token"
+        );
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationLineToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationLineToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return config;
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public string GetCallbackUrl() {
+        return RedirectUri;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> {
+            { "loginChannelId", clientId },
+            { "returnUri", GenerateReturnUri() },
+        };
+        
+        return authorizeArgs;
+    }
+
+    private string GenerateReturnUri() {
+        var query = new Dictionary<string, string> {
+            { "response_type", responseType },
+            { "client_id", clientId },
+            { "redirect_uri", RedirectUri }
+        };
+
+        // State is a must in LINE Login.
+        var state = GenerateAndStoreState();
+        query.Add("state", state);
+        
+        if (!String.IsNullOrEmpty(scope)) {
+            query.Add("scope", scope);
+        } else {
+            query.Add("scope", "profile");
+        }
+        if (optional != null) {
+            if (optional.PKCESupport != UniWebViewAuthenticationPKCE.None) {
+                var codeChallenge = GenerateCodeChallengeAndStoreCodeVerify(optional.PKCESupport);
+                query.Add("code_challenge", codeChallenge);
+        
+                var method = UniWebViewAuthenticationUtils.ConvertPKCEToString(optional.PKCESupport);
+                query.Add("code_challenge_method", method);
+            }
+        }
+        return "/oauth2/v2.1/authorize/consent?" + UniWebViewAuthenticationUtils.CreateQueryString(query);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        var normalizedRedirectUri = UniWebViewAuthenticationUtils.ConvertIntentUri(RedirectUri);
+        if (!authResponse.StartsWith(normalizedRedirectUri, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        VerifyState(response);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "code", code },
+            { "redirect_uri", RedirectUri },
+            { "grant_type", grantType },
+        };
+        if (CodeVerify != null) {
+            parameters.Add("code_verifier", CodeVerify);
+        }
+
+        return parameters;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        return new Dictionary<string, string> {
+            { "client_id", clientId }, 
+            { "refresh_token", refreshToken },
+            { "grant_type", "refresh_token" }
+        };
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationLineToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return UniWebViewAuthenticationTokenFactory<UniWebViewAuthenticationLineToken>.Parse(exchangeResponse);
+    }
+
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationLineToken> OnAuthenticationFinished { get; set; }
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationLineToken> OnRefreshTokenFinished { get; set;  }
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for LINE.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowLineOptional {
+    /// <summary>
+    /// Whether to enable PKCE when performing authentication. Default is `S256`.
+    /// </summary>
+    public UniWebViewAuthenticationPKCE PKCESupport = UniWebViewAuthenticationPKCE.S256;
+}
+
+/// <summary>
+/// The token object from LINE. Check `UniWebViewAuthenticationStandardToken` for more.
+/// </summary>
+public class UniWebViewAuthenticationLineToken : UniWebViewAuthenticationStandardToken { }

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowLine.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowTwitter.cs

@@ -0,0 +1,211 @@
+//
+//  UniWebViewAuthenticationFlowTwitter.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+
+/// <summary>
+/// A predefined authentication flow for Twitter.
+/// 
+/// This implementation follows the flow described here:
+/// https://developer.twitter.com/en/docs/authentication/oauth-2-0/authorization-code
+///
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </summary>
+public class UniWebViewAuthenticationFlowTwitter : UniWebViewAuthenticationCommonFlow, IUniWebViewAuthenticationFlow<UniWebViewAuthenticationTwitterToken> {
+    /// <summary>
+    /// The client ID of your Twitter application.
+    /// </summary>
+    public string clientId = "";
+    /// <summary>
+    /// The redirect URI of your Twitter application.
+    /// </summary>
+    public string redirectUri = "";
+    /// <summary>
+    /// The scope string of all your required scopes.
+    /// </summary>
+    public string scope = "";
+    /// <summary>
+    /// Optional to control this flow's behaviour.
+    /// </summary>
+    public UniWebViewAuthenticationFlowTwitterOptional optional;
+    
+    private const string responseType = "code";
+    private const string grantType = "authorization_code";
+    
+    private readonly UniWebViewAuthenticationConfiguration config = 
+        new UniWebViewAuthenticationConfiguration(
+            "https://twitter.com/i/oauth2/authorize", 
+            "https://api.twitter.com/2/oauth2/token"
+        );
+
+    /// <summary>
+    /// Starts the authentication flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    public override void StartAuthenticationFlow() {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationTwitterToken>(this);
+        flow.StartAuth();
+    }
+
+    /// <summary>
+    /// Starts the refresh flow with the standard OAuth 2.0.
+    /// This implements the abstract method in `UniWebViewAuthenticationCommonFlow`.
+    /// </summary>
+    /// <param name="refreshToken">The refresh token received with a previous access token response.</param>
+    public override void StartRefreshTokenFlow(string refreshToken) {
+        var flow = new UniWebViewAuthenticationFlow<UniWebViewAuthenticationTwitterToken>(this);
+        flow.RefreshToken(refreshToken);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationConfiguration GetAuthenticationConfiguration() {
+        return config;
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public string GetCallbackUrl() {
+        return redirectUri;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAuthenticationUriArguments() {
+        var authorizeArgs = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "redirect_uri", redirectUri },
+            { "scope", scope },
+            { "response_type", responseType }
+        };
+        if (optional != null) {
+            if (optional.enableState) {
+                var state = GenerateAndStoreState();
+                authorizeArgs.Add("state", state);
+            }
+
+            if (optional.PKCESupport != UniWebViewAuthenticationPKCE.None) {
+                var codeChallenge = GenerateCodeChallengeAndStoreCodeVerify(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge", codeChallenge);
+
+                var method = UniWebViewAuthenticationUtils.ConvertPKCEToString(optional.PKCESupport);
+                authorizeArgs.Add("code_challenge_method", method);
+            }
+        }
+
+        return authorizeArgs;
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetAccessTokenRequestParameters(string authResponse) {
+        if (!authResponse.StartsWith(redirectUri, StringComparison.InvariantCultureIgnoreCase)) {
+            throw AuthenticationResponseException.UnexpectedAuthCallbackUrl;
+        }
+        
+        var uri = new Uri(authResponse);
+        var response = UniWebViewAuthenticationUtils.ParseFormUrlEncodedString(uri.Query);
+        if (!response.TryGetValue("code", out var code)) {
+            throw AuthenticationResponseException.InvalidResponse(authResponse);
+        }
+        if (optional.enableState) {
+            VerifyState(response);
+        }
+        var parameters = new Dictionary<string, string> {
+            { "client_id", clientId },
+            { "code", code },
+            { "redirect_uri", redirectUri },
+            { "grant_type", grantType },
+        };
+        if (CodeVerify != null) {
+            parameters.Add("code_verifier", CodeVerify);
+        }
+
+        return parameters;
+    }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public Dictionary<string, string> GetRefreshTokenRequestParameters(string refreshToken) {
+        return new Dictionary<string, string> {
+            { "client_id", clientId }, 
+            { "refresh_token", refreshToken },
+            { "grant_type", "refresh_token" }
+        };
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    public UniWebViewAuthenticationTwitterToken GenerateTokenFromExchangeResponse(string exchangeResponse) {
+        return UniWebViewAuthenticationTokenFactory<UniWebViewAuthenticationTwitterToken>.Parse(exchangeResponse);
+    }
+
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationTwitterToken> OnAuthenticationFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnAuthenticationErrored { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<UniWebViewAuthenticationTwitterToken> OnRefreshTokenFinished { get; set; }
+    
+    /// <summary>
+    /// Implements required method in `IUniWebViewAuthenticationFlow`.
+    /// </summary>
+    [field: SerializeField]
+    public UnityEvent<long, string> OnRefreshTokenErrored { get; set; }
+}
+
+/// <summary>
+/// The authentication flow's optional settings for Twitter.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationFlowTwitterOptional {
+    /// <summary>
+    /// Whether to enable PKCE when performing authentication.This has to be enabled as `S256`,
+    /// otherwise, Twitter will reject the authentication request.
+    /// </summary>
+    public UniWebViewAuthenticationPKCE PKCESupport = UniWebViewAuthenticationPKCE.S256;
+    /// <summary>
+    /// Whether to enable the state verification. If enabled, the state will be generated and verified in the
+    /// authentication callback. This has to be `true`, otherwise, Twitter will reject the authentication request.
+    /// </summary>
+    public bool enableState = true;
+}
+
+/// <summary>
+/// The token object from Twitter. Check `UniWebViewAuthenticationStandardToken` for more.
+/// </summary>
+public class UniWebViewAuthenticationTwitterToken : UniWebViewAuthenticationStandardToken { }

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationFlowTwitter.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationSession.cs

@@ -0,0 +1,182 @@
+//
+//  UniWebViewAuthenticationSession.cs
+//  Created by Wang Wei(@onevcat) on 2022-06-21.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not 
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using UnityEngine;
+using System;
+
+/// <summary>
+/// Represents a session that can be used to authenticate a user through a web service.
+/// </summary>
+/// <remarks>
+/// Initialize the session with a URL that points to the authentication webpage. A browser or a secure web view loads
+/// and displays the page. On completion, the service sends a callback URL to the session with an authentication token,
+/// and this triggers the `OnAuthenticationFinished` with the received URL. To make your app be invoked by the system,
+/// you need to also add the correct callback URL starting with the value of `CallbackScheme` to UniWebView's preferences.
+///
+/// Usually this session processes an OAuth 2 flow. It will be used along with a following "exchange token" request, to
+/// finally get the user's access token to allow you use the service APIs on behalf of the user. This token exchange can
+/// happen in the client app, or you can pass the code to your server and let your server do the left work.
+///
+/// UniWebView also provides built-in integrated authentication flows for several popular service. The the
+/// `UniWebViewAuthenticationFlow` cluster classes to use them and simplify your work. If the built-in models do not
+/// fit your work, you can use this class as a starting point of your own authentication integration. 
+/// 
+/// See https://docs.uniwebview.com/guide/oauth2.html for a more detailed guide of authentication in UniWebView.
+/// </remarks>
+public class UniWebViewAuthenticationSession: UnityEngine.Object {
+  /// <summary>
+  /// Delegate for authentication session finished event.
+  /// </summary>
+  /// <param name="session">The session which raised this event.</param>
+  /// <param name="url">
+  /// The received URL from service. It might contain a valid `code` from the service, or an error.
+  /// </param>
+  public delegate void AuthenticationFinishedDelegate(UniWebViewAuthenticationSession session, string url);
+  
+  /// <summary>
+  /// Raised when the session finishes authentication.
+  ///
+  /// This event will be invoked when the service provider calls the callback URL. regardless of the authentication code
+  /// is retrieved or an error is returned in the callback URL.
+  /// </summary>
+  public event AuthenticationFinishedDelegate OnAuthenticationFinished;
+
+  /// <summary>
+  /// Delegate for authentication session error encounter event.
+  /// </summary>
+  /// <param name="session">The session which raised this event.</param>
+  /// <param name="errorCode">The error code represents the error type.</param>
+  /// <param name="errorMessage">The error message describes the error in detail.</param>
+  public delegate void AuthErrorReceivedDelegate(UniWebViewAuthenticationSession session, int errorCode, string errorMessage);
+  
+  /// <summary>
+  /// Raised when the session encounters an error.
+  ///
+  /// This event will be invoked when the authentication session cannot finishes with a URL callback. This usually
+  /// happens when a network error or the user dismisses the authentication page from native UI.
+  /// </summary>
+  public event AuthErrorReceivedDelegate OnAuthenticationErrorReceived;
+
+  private readonly string id = Guid.NewGuid().ToString();
+  private UniWebViewNativeListener listener;
+  
+  /// <summary>
+  /// The URL of the authentication webpage. This is the value you used to create this session.
+  /// </summary>
+  public string Url { get; private set; }
+  
+  /// <summary>
+  /// The callback scheme of the authentication webpage. This is the value you used to create this session. The service
+  /// is expected to use a URL with this scheme to return to your app. 
+  /// </summary>
+  public string CallbackScheme { get; private set; }
+
+  internal void InternalAuthenticationFinished(string url) {
+    if (OnAuthenticationFinished != null) {
+      OnAuthenticationFinished(this, url);
+    }
+    UniWebViewNativeListener.RemoveListener(listener.Name);
+    Destroy(listener.gameObject);
+  }
+
+  internal void InternalAuthenticationErrorReceived(UniWebViewNativeResultPayload payload) {
+    if (OnAuthenticationErrorReceived != null) {
+      int errorCode = int.TryParse(payload.resultCode, out errorCode) ? errorCode : -1;
+      OnAuthenticationErrorReceived(this, errorCode, payload.data);
+    }
+    
+    UniWebViewNativeListener.RemoveListener(listener.Name);
+    Destroy(listener.gameObject);
+  }
+
+  private UniWebViewAuthenticationSession() {  
+    var listenerObject = new GameObject("UniWebViewAuthSession-" + id);
+    listener = listenerObject.AddComponent<UniWebViewNativeListener>();
+    UniWebViewNativeListener.AddListener(listener);
+  }
+
+  /// <summary>
+  /// Check whether the current device and system supports the authentication session.
+  /// </summary>
+  /// <remarks>
+  /// This property always returns `true` on iOS 11, macOS 10.15 and later. On Android, it depends on whether there
+  /// is an Intent can handle the safe browsing request,  which is use to display the authentication page. Usually
+  /// it is provided by Chrome. If there is no Intent can open the URL in safe browsing mode, this property will
+  /// return `false`.
+  /// 
+  /// To use this API on Android when you set your Target SDK to Android 11 or later, you need to declare the correct 
+  /// intent query explicitly in your AndroidManifest.xml, to follow the Package Visibility 
+  /// (https://developer.android.com/about/versions/11/privacy/package-visibility):
+  /// 
+  /// ```xml
+  /// <queries>
+  ///   <intent>
+  ///     <action android:name="android.support.customtabs.action.CustomTabsService" />
+  ///   </intent>
+  /// </queries>
+  /// ```
+  /// </remarks>
+  /// <returns>
+  /// Returns `true` if the safe browsing mode is supported and the page will be opened in safe browsing 
+  /// mode. Otherwise, `false`.
+  /// </returns>
+  public static bool IsAuthenticationSupported => UniWebViewInterface.IsAuthenticationIsSupported();
+
+  /// <summary>
+  /// Creates a new authentication session with a given authentication page URL and a callback scheme.
+  /// </summary>
+  /// <param name="url">
+  /// The authentication page which is provided by the service. It should be a URL with some information like your app's
+  /// client id and required scopes, etc.
+  /// </param>
+  /// <param name="callbackScheme">The URL scheme which the service will use to navigate back to your client app.</param>
+  /// <returns></returns>
+  public static UniWebViewAuthenticationSession Create(string url, string callbackScheme) {
+    var session = new UniWebViewAuthenticationSession();
+    session.listener.session = session;
+    session.Url = url;
+    session.CallbackScheme = callbackScheme;
+
+    UniWebViewInterface.AuthenticationInit(session.listener.Name, url, callbackScheme);
+
+    return session;
+  }
+
+  /// <summary>
+  /// Start the authentication session process. It will show up a secured web page and navigate users to the `Url`.
+  /// </summary>
+  public void Start() {
+    UniWebViewInterface.AuthenticationStart(listener.Name);
+  }
+
+  /// <summary>
+  /// Sets to use the private mode for the authentication. If running under private mode, the previous stored
+  /// authentication information will not be used.
+  /// <remarks>
+  /// On Apple's platform, this works from iOS 13 and macOS 10.15. On Android, this depends on the Chrome setting on the
+  /// device. The users should enable the "incognito" and "third-party incognito" to allow to use this feature.
+  ///
+  /// Check them in Chrome app:
+  ///   chrome://flags/#cct-incognito
+  ///   chrome://flags/#cct-incognito-available-to-third-party
+  /// </remarks>
+  /// </summary>
+  /// <param name="flag">Whether the session should run in private mode or not.</param>
+  public void SetPrivateMode(bool flag) {
+    UniWebViewInterface.AuthenticationSetPrivateMode(listener.Name, flag);
+  }
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationSession.cs.meta

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Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationStandardToken.cs

@@ -0,0 +1,116 @@
+//
+//  UniWebViewAuthenticationStandardToken.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using UnityEngine;
+
+/// <summary>
+/// Represents the standard token used in the OAuth 2 process.
+/// </summary>
+[Serializable]
+public class UniWebViewAuthenticationStandardToken {
+    // Unity's JsonUtility.FromJson is quite stupid on this.
+    // Switch to Newtonsoft.Json when we can support from Unity 2021.
+    [SerializeField]
+    private string access_token = default;
+    /// <summary>
+    /// The access token retrieved from the service provider.
+    ///
+    /// This usually comes from the `access_token` field in the response.
+    /// Use this token to access the service provider's API.
+    /// 
+    /// If you do not need the token "offline", just use it and discard. UniWebView will not store this token, if you
+    /// need to keep it for other purpose, please make sure you do not violate any policies and put it to a secure
+    /// place yourself.
+    /// </summary>
+    public string AccessToken => access_token;
+
+    [SerializeField]
+    private string scope = default;
+    /// <summary>
+    /// The granted scopes of the token. This is usually comes from the `scope` field in the response.
+    ///
+    /// If there are optional scopes in the initial auth request, the user can choose to not give you some of the
+    /// permissions. Check this field before you use the access token to perform certain actions to avoid failure
+    /// before actual attempts.
+    /// </summary>
+    public string Scope => scope;
+
+    [SerializeField]
+    private string token_type = default;
+    /// <summary>
+    /// The token type. This usually comes from the `token_type` field in the response.
+    ///
+    /// For most OAuth 2.0 services, it is fixed to `Bearer`.
+    /// </summary>
+    public string TokenType => token_type;
+
+    [SerializeField]
+    private string refresh_token = default;
+    /// <summary>
+    /// The refresh token retrieved from the service provider. This usually comes from the `refresh_token` field in the
+    /// response.
+    ///
+    /// If the access token is refreshable, you can use this
+    /// refresh token to perform a refresh operation and get a new access token without the user's consent again.
+    ///
+    /// The refresh policy can be different from the service providers. Read the documentation of the service provider
+    /// to determine the use of refresh token.
+    ///
+    /// If the response does not contain a refresh token, this field will be `null`.
+    /// </summary>
+    public string RefreshToken => refresh_token;
+    
+    [SerializeField]
+    private long expires_in = default;
+    /// <summary>
+    /// How long does this token remain valid. This usually comes from the `expires_in` field in the response.
+    /// </summary>
+    public long ExpiresIn => expires_in;
+    
+    [SerializeField]
+    private string id_token = default;
+    /// <summary>
+    /// The ID token retrieved from the service provider. This usually comes from the `id_token` field in the response.
+    ///
+    /// If the service provider does not support ID token or you did not apply for it, this field will be `null`.
+    /// The ID token is usually a JWT token that contains information about the user.
+    /// </summary>
+    public string IdToken => id_token;
+    
+    /// <summary>
+    /// The raw value of the response of the exchange token request.
+    /// 
+    /// If the predefined fields are not enough, you can parse the raw value to get the extra information.
+    /// </summary>
+    public string RawValue { get; set; }
+}
+
+/// <summary>
+/// Util class to generate the standard token from a JSON based exchange token response.
+/// </summary>
+/// <typeparam name="TToken">The type of target token.</typeparam>
+public abstract class UniWebViewAuthenticationTokenFactory<TToken> where TToken : UniWebViewAuthenticationStandardToken {
+    public static TToken Parse(string result)  {
+        var json = JsonUtility.FromJson<TToken>(result);
+        json.RawValue = result;
+        if (json.AccessToken == null) {
+            throw AuthenticationResponseException.InvalidResponse(result);
+        }
+        return json;
+    }
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationStandardToken.cs.meta

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+guid: bda3fe59d0bb48c890f1545b0b22dee4
+timeCreated: 1656308530

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationUtils.cs

@@ -0,0 +1,198 @@
+//
+//  UniWebViewAuthenticationUtils.cs
+//  Created by Wang Wei (@onevcat) on 2022-06-25.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using UnityEngine.Networking;
+
+/// <summary>
+/// This class provides some helper utils for performing the authentication flow.
+/// 
+/// They are used inside the built-in flows, but you can also use them to implement your own flow.
+/// </summary>
+public class UniWebViewAuthenticationUtils {
+    internal static Dictionary<string, string> ParseFormUrlEncodedString(string input) {
+        var result = new Dictionary<string, string>();
+        if (input.StartsWith("?") || input.StartsWith("#")) {
+            input = input.Substring(1);
+        }
+
+        var pairs = input.Split('&');
+        foreach (var pair in pairs) {
+            var kv = pair.Split('=');
+            result.Add(UnityWebRequest.UnEscapeURL(kv[0]), UnityWebRequest.UnEscapeURL(kv[1]));
+        }
+
+        return result;
+    }
+
+    /// <summary>
+    /// Generates a random Base64 encoded string.
+    /// </summary>
+    /// <returns>A random Base64 encoded string.</returns>
+    public static string GenerateRandomBase64String() {
+        var randomNumber = new byte[32];
+        string value = "";
+        using (var rng = RandomNumberGenerator.Create()) {
+            rng.GetBytes(randomNumber);
+            value = Convert.ToBase64String(randomNumber);
+        }
+
+        return value;
+    }
+
+    /// <summary>
+    /// Generates a random Base64URL encoded string.
+    /// </summary>
+    /// <returns>A random Base64URL encoded string.</returns>
+    public static string GenerateRandomBase64URLString() {
+        var value = GenerateRandomBase64String();
+        return ConvertToBase64URLString(value);
+    }
+
+    static readonly char[] padding = { '=' };
+
+    /// <summary>
+    /// Converts a Base64 encoded string to a Base64URL encoded string.
+    /// </summary>
+    /// <param name="input">The Base64 encoded string.</param>
+    /// <returns>A string with Base64URL encoded for the input.</returns>
+    public static string ConvertToBase64URLString(string input) {
+        return input.TrimEnd(padding).Replace('+', '-').Replace('/', '_');
+    }
+
+    /// <summary>
+    /// Converts a Base64URL encoded string to a Base64 encoded string.
+    /// </summary>
+    /// <param name="input">The Base64URL encoded string.</param>
+    /// <returns>A string with Base64 encoded for the input.</returns>
+    public static string ConvertToBase64String(string input) {
+        var result = input.Replace('_', '/').Replace('-', '+');
+        switch (input.Length % 4) {
+            case 2:
+                result += "==";
+                break;
+            case 3:
+                result += "=";
+                break;
+        }
+
+        return result;
+    }
+
+    /// <summary>
+    /// Generates a code verifier for PKCE usage.
+    /// </summary>
+    /// <param name="length">The length of the target code verifier. Default is 64.</param>
+    /// <returns>A generated code verifier for PKCE usage.</returns>
+    public static string GenerateCodeVerifier(int length = 64) {
+        var randomNumber = new byte[32];
+        string value;
+
+        using var rng = RandomNumberGenerator.Create();
+        rng.GetBytes(randomNumber);
+        const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~";
+        var random = new Random(System.BitConverter.ToInt32(randomNumber, 0));
+        value = new string(Enumerable.Repeat(chars, length).Select(s => s[random.Next(s.Length)]).ToArray());
+
+        return value;
+    }
+
+    /// <summary>
+    /// Calculates the code challenge for PKCE usage, with a given code verifier and hash method.
+    /// </summary>
+    /// <param name="codeVerifier">The code verifier you generated.</param>
+    /// <param name="method">The hash method you want to use.</param>
+    /// <returns>The result of the code challenge.</returns>
+    public static string CalculateCodeChallenge(string codeVerifier, UniWebViewAuthenticationPKCE method) {
+        switch (method) {
+            case UniWebViewAuthenticationPKCE.None:
+                throw new ArgumentOutOfRangeException(nameof(method), method, null);
+            case UniWebViewAuthenticationPKCE.S256:
+                var sha256 = SHA256.Create();
+                var hash = sha256.ComputeHash(System.Text.Encoding.UTF8.GetBytes(codeVerifier));
+                return ConvertToBase64URLString(System.Convert.ToBase64String(hash));
+            case UniWebViewAuthenticationPKCE.Plain:
+                return codeVerifier;
+            default:
+                throw new ArgumentOutOfRangeException(nameof(method), method, null);
+        }
+    }
+
+    public static string ConvertPKCEToString(UniWebViewAuthenticationPKCE method) {
+        switch (method) {
+            case UniWebViewAuthenticationPKCE.None:
+                return null;
+            case UniWebViewAuthenticationPKCE.S256:
+                return "S256";
+            case UniWebViewAuthenticationPKCE.Plain:
+                return "plain";
+        }
+
+        return null;
+    }
+
+    public static string ConvertIntentUri(string input) {
+        var uri = new Uri(input);
+        if (uri.Scheme != "intent") {
+            return input;
+        }
+
+        var host = uri.Host;
+        string scheme = null;
+        var fragments = uri.Fragment;
+        fragments.Split(';').ToList().ForEach(fragment => {
+            var kv = fragment.Split('=');
+            if (kv.Length == 2 && kv[0] == "scheme") {
+                scheme = kv[1];
+            }
+        });
+        
+        if (!String.IsNullOrEmpty(scheme)) {
+            return scheme + "://" + host;
+        }
+
+        return input;
+    }
+
+    public static string CreateQueryString(Dictionary<string, string> collection) {
+        int count = collection.Count;
+        if (count == 0) {
+            return "";            
+        }
+        StringBuilder sb = new StringBuilder();
+        string [] keys = collection.Keys.ToArray();
+        for (int i = 0; i < count; i++) {
+            sb.AppendFormat ("{0}={1}&", keys[i], UnityWebRequest.EscapeURL(collection[keys[i]]));
+        }
+
+        if (sb.Length > 0) {
+            sb.Length--;            
+        }
+        return sb.ToString();
+    }
+}
+
+public enum UniWebViewAuthenticationPKCE
+{
+    None,
+    S256,
+    Plain
+}

Assets/UniWebView/Script/UniWebViewAuthentication/UniWebViewAuthenticationUtils.cs.meta

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Assets/UniWebView/Script/UniWebViewCacheMode.cs

@@ -0,0 +1,45 @@
+//
+//  UniWebViewCacheMode.cs
+//  Created by Wang Wei(@onevcat) on 2024-01-17.
+//
+//  This file is a part of UniWebView Project (https://uniwebview.com)
+//  By purchasing the asset, you are allowed to use this code in as many as projects 
+//  you want, only if you publish the final products under the name of the same account
+//  used for the purchase. 
+//
+//  This asset and all corresponding files (such as source code) are provided on an 
+//  “as is” basis, without warranty of any kind, express of implied, including but not
+//  limited to the warranties of merchantability, fitness for a particular purpose, and 
+//  noninfringement. In no event shall the authors or copyright holders be liable for any 
+//  claim, damages or other liability, whether in action of contract, tort or otherwise, 
+//  arising from, out of or in connection with the software or the use of other dealing in the software.
+
+/// <summary>
+/// Defines the cache mode for UniWebView.
+/// </summary>
+public enum UniWebViewCacheMode
+{
+    /// <summary>
+    /// Default mode. The web view will check the validity of the cache copy when there is one. If the copy is invalid,
+    /// the web view will load from the network. This is the default setting.
+    /// </summary>
+    Default = 0,
+
+    /// <summary>
+    /// No cache is used. All pages are loaded directly from the network. This is useful for applications that do not
+    /// want to have a cache.
+    /// </summary>
+    NoCache = 1,
+
+    /// <summary>
+    /// Prioritize the cache. If there is a copy of the page in the cache, the web view will use it even if the copy
+    /// has expired. The web view will only load from the network when the page does not exist in the cache.
+    /// </summary>
+    CacheElseLoad = 2,
+
+    /// <summary>
+    /// Only use the cache. In this mode, the web view will not load pages from the network, only use the content in
+    /// the cache. If the requested URL is not in the cache, an error is returned.
+    /// </summary>
+    CacheOnly = 3,
+}

Assets/UniWebView/Script/UniWebViewCacheMode.cs.meta

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