Added ProcessGlobalConfig for Android WebViews, Added disableWebView static method on InAppWebViewController for Android, Added support for Android WebViewFeature.isStartupFeatureSupported, WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS, WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX, WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER, Added WebMessage.type property, WebMessage.data property is of type dynamic, JavaScriptReplyProxy.postMessage is of type WebMessage, changed WebMessageListener.onPostMessage and WebMessagePort.setWebMessageCallback methods signature

CHANGELOG.md

@@ -1,3 +1,16 @@
+## 6.0.0-beta.28
+
+- Added `ProcessGlobalConfig` for Android WebViews
+- Added `disableWebView` static method on `InAppWebViewController` for Android
+- Added support for Android `WebViewFeature.isStartupFeatureSupported`, `WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS`, `WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX`, `WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER`
+- Added `WebMessage.type` property
+
+### BREAKING CHANGES
+
+- `WebMessage.data` property is of type `dynamic`
+- `JavaScriptReplyProxy.postMessage` is of type `WebMessage`
+- `WebMessageListener.onPostMessage` and `WebMessagePort.setWebMessageCallback` methods signature
+
 ## 6.0.0-beta.27
 
 - Added `requestPostMessageChannel`, `postMessage`, `isEngagementSignalsApiAvailable` methods on `ChromeSafariBrowser` for Android

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebViewFlutterPlugin.java

@@ -2,29 +2,28 @@ package com.pichillilorenzo.flutter_inappwebview;
 
 import android.app.Activity;
 import android.content.Context;
-import android.net.Uri;
 import android.os.Build;
-import android.webkit.ValueCallback;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import com.pichillilorenzo.flutter_inappwebview.chrome_custom_tabs.ChromeSafariBrowserManager;
 import com.pichillilorenzo.flutter_inappwebview.credential_database.CredentialDatabaseHandler;
-import com.pichillilorenzo.flutter_inappwebview.in_app_browser.InAppBrowserManager;
 import com.pichillilorenzo.flutter_inappwebview.headless_in_app_webview.HeadlessInAppWebViewManager;
+import com.pichillilorenzo.flutter_inappwebview.in_app_browser.InAppBrowserManager;
 import com.pichillilorenzo.flutter_inappwebview.print_job.PrintJobManager;
+import com.pichillilorenzo.flutter_inappwebview.process_global_config.ProcessGlobalConfigManager;
 import com.pichillilorenzo.flutter_inappwebview.proxy.ProxyManager;
 import com.pichillilorenzo.flutter_inappwebview.service_worker.ServiceWorkerManager;
 import com.pichillilorenzo.flutter_inappwebview.tracing.TracingControllerManager;
 import com.pichillilorenzo.flutter_inappwebview.webview.FlutterWebViewFactory;
 import com.pichillilorenzo.flutter_inappwebview.webview.InAppWebViewManager;
 
+import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.embedding.engine.plugins.activity.ActivityAware;
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.PluginRegistry;
-import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.plugin.platform.PlatformViewRegistry;
 import io.flutter.view.FlutterView;
 
@@ -58,6 +57,8 @@ public class InAppWebViewFlutterPlugin implements FlutterPlugin, ActivityAware {
   public PrintJobManager printJobManager;
   @Nullable
   public TracingControllerManager tracingControllerManager;
+  @Nullable
+  public ProcessGlobalConfigManager processGlobalConfigManager;
   public FlutterWebViewFactory flutterWebViewFactory;
   public Context applicationContext;
   public PluginRegistry.Registrar registrar;
@@ -122,6 +123,7 @@ public class InAppWebViewFlutterPlugin implements FlutterPlugin, ActivityAware {
       printJobManager = new PrintJobManager(this);
     }
     tracingControllerManager = new TracingControllerManager(this);
+    processGlobalConfigManager = new ProcessGlobalConfigManager(this);
   }
 
   @Override
@@ -178,6 +180,10 @@ public class InAppWebViewFlutterPlugin implements FlutterPlugin, ActivityAware {
       tracingControllerManager.dispose();
       tracingControllerManager = null;
     }
+    if (processGlobalConfigManager != null) {
+      processGlobalConfigManager.dispose();
+      processGlobalConfigManager = null;
+    }
   }
 
   @Override

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/WebViewFeatureManager.java

@@ -28,6 +28,12 @@ public class WebViewFeatureManager extends ChannelDelegateImpl {
         String feature = (String) call.argument("feature");
         result.success(WebViewFeature.isFeatureSupported(feature));
         break;
+      case "isStartupFeatureSupported":
+        if (plugin != null && plugin.activity != null) {
+          String startupFeature = (String) call.argument("startupFeature");
+          result.success(WebViewFeature.isStartupFeatureSupported(plugin.activity, startupFeature));
+        }
+        break;
       default:
         result.notImplemented();
     }

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/process_global_config/ProcessGlobalConfigManager.java

@@ -0,0 +1,50 @@
+package com.pichillilorenzo.flutter_inappwebview.process_global_config;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.webkit.ProcessGlobalConfig;
+import androidx.webkit.WebViewFeature;
+
+import com.pichillilorenzo.flutter_inappwebview.InAppWebViewFlutterPlugin;
+import com.pichillilorenzo.flutter_inappwebview.pull_to_refresh.PullToRefreshSettings;
+import com.pichillilorenzo.flutter_inappwebview.types.ChannelDelegateImpl;
+
+import java.util.Map;
+
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+
+public class ProcessGlobalConfigManager extends ChannelDelegateImpl {
+  protected static final String LOG_TAG = "ProcessGlobalConfigManager";
+  public static final String METHOD_CHANNEL_NAME = "com.pichillilorenzo/flutter_inappwebview_processglobalconfig";
+
+  @Nullable
+  public InAppWebViewFlutterPlugin plugin;
+
+  public ProcessGlobalConfigManager(@NonNull final InAppWebViewFlutterPlugin plugin) {
+    super(new MethodChannel(plugin.messenger, METHOD_CHANNEL_NAME));
+    this.plugin = plugin;
+  }
+
+  @Override
+  public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
+    switch (call.method) {
+      case "apply":
+        if (plugin != null && plugin.activity != null) {
+          ProcessGlobalConfigSettings settings = (new ProcessGlobalConfigSettings())
+                  .parse((Map<String, Object>) call.argument("settings"));
+          ProcessGlobalConfig.apply(settings.toProcessGlobalConfig(plugin.activity));
+        }
+        result.success(true);
+        break;
+      default:
+        result.notImplemented();
+    }
+  }
+
+  @Override
+  public void dispose() {
+    super.dispose();
+    plugin = null;
+  }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/process_global_config/ProcessGlobalConfigSettings.java

@@ -0,0 +1,119 @@
+package com.pichillilorenzo.flutter_inappwebview.process_global_config;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.webkit.ProcessGlobalConfig;
+import androidx.webkit.WebViewFeature;
+
+import com.pichillilorenzo.flutter_inappwebview.ISettings;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ProcessGlobalConfigSettings implements ISettings<ProcessGlobalConfig> {
+  public static final String LOG_TAG = "ProcessGlobalConfigSettings";
+
+  @Nullable
+  public String dataDirectorySuffix;
+  @Nullable
+  public DirectoryBasePaths directoryBasePaths;
+
+  @NonNull
+  @Override
+  public ProcessGlobalConfigSettings parse(@NonNull Map<String, Object> settings) {
+    for (Map.Entry<String, Object> pair : settings.entrySet()) {
+      String key = pair.getKey();
+      Object value = pair.getValue();
+      if (value == null) {
+        continue;
+      }
+
+      switch (key) {
+        case "dataDirectorySuffix":
+          dataDirectorySuffix = (String) value;
+          break;
+        case "directoryBasePaths":
+          directoryBasePaths = (new DirectoryBasePaths()).parse((Map<String, Object>) value);
+          break;
+      }
+    }
+
+    return this;
+  }
+
+  public ProcessGlobalConfig toProcessGlobalConfig(@NonNull Context context) {
+    ProcessGlobalConfig config = new ProcessGlobalConfig();
+    if (dataDirectorySuffix != null &&
+            WebViewFeature.isStartupFeatureSupported(context, WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX)) {
+      config.setDataDirectorySuffix(context, dataDirectorySuffix);
+    }
+    if (directoryBasePaths != null &&
+            WebViewFeature.isStartupFeatureSupported(context, WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS)) {
+      config.setDirectoryBasePaths(context,
+              new File(directoryBasePaths.dataDirectoryBasePath),
+              new File(directoryBasePaths.cacheDirectoryBasePath));
+    }
+    return config;
+  }
+  @NonNull
+  public Map<String, Object> toMap() {
+    Map<String, Object> settings = new HashMap<>();
+    settings.put("dataDirectorySuffix", dataDirectorySuffix);
+    return settings;
+  }
+
+  @NonNull
+  @Override
+  public Map<String, Object> getRealSettings(@NonNull ProcessGlobalConfig processGlobalConfig) {
+    Map<String, Object> realSettings = toMap();
+    return realSettings;
+  }
+
+  static class DirectoryBasePaths implements ISettings<Object> {
+    public static final String LOG_TAG = "ProcessGlobalConfigSettings";
+
+    public String cacheDirectoryBasePath;
+    public String dataDirectoryBasePath;
+
+    @NonNull
+    @Override
+    public DirectoryBasePaths parse(@NonNull Map<String, Object> settings) {
+      for (Map.Entry<String, Object> pair : settings.entrySet()) {
+        String key = pair.getKey();
+        Object value = pair.getValue();
+        if (value == null) {
+          continue;
+        }
+
+        switch (key) {
+          case "cacheDirectoryBasePath":
+            cacheDirectoryBasePath = (String) value;
+            break;
+          case "dataDirectoryBasePath":
+            dataDirectoryBasePath = (String) value;
+            break;
+        }
+      }
+
+      return this;
+    }
+
+    @NonNull
+    public Map<String, Object> toMap() {
+      Map<String, Object> settings = new HashMap<>();
+      settings.put("cacheDirectoryBasePath", cacheDirectoryBasePath);
+      settings.put("dataDirectoryBasePath", dataDirectoryBasePath);
+      return settings;
+    }
+
+    @NonNull
+    @Override
+    public Map<String, Object> getRealSettings(@NonNull Object obj) {
+      Map<String, Object> realSettings = toMap();
+      return realSettings;
+    }
+  }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/types/WebMessageCompatExt.java

@@ -0,0 +1,117 @@
+package com.pichillilorenzo.flutter_inappwebview.types;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.webkit.WebMessageCompat;
+import androidx.webkit.WebViewFeature;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+public class WebMessageCompatExt {
+  @Nullable
+  private Object data;
+  private @WebMessageCompat.Type int type;
+
+  @Nullable
+  private List<WebMessagePortCompatExt> ports;
+
+  public WebMessageCompatExt(@Nullable Object data, int type, @Nullable List<WebMessagePortCompatExt> ports) {
+    this.data = data;
+    this.type = type;
+    this.ports = ports;
+  }
+
+  public static WebMessageCompatExt fromMapWebMessageCompat(@NonNull WebMessageCompat message) {
+    Object data;
+    if (WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER) && message.getType() == WebMessageCompat.TYPE_ARRAY_BUFFER) {
+      data = message.getArrayBuffer();
+    } else {
+      data = message.getData();
+    }
+    return new WebMessageCompatExt(data, message.getType(), null);
+  }
+
+  @Nullable
+  public static WebMessageCompatExt fromMap(@Nullable Map<String, Object> map) {
+    if (map == null) {
+      return null;
+    }
+    Object data = map.get("data");
+    Integer type = (Integer) map.get("type");
+    List<Map<String, Object>> portMapList = (List<Map<String, Object>>) map.get("ports");
+    List<WebMessagePortCompatExt> ports = null;
+    if (portMapList != null && !portMapList.isEmpty()) {
+      ports = new ArrayList<>();
+      for (Map<String, Object> portMap : portMapList) {
+        ports.add(WebMessagePortCompatExt.fromMap(portMap));
+      }
+    }
+    return new WebMessageCompatExt(data, type, ports);
+  }
+
+  public Map<String, Object> toMap() {
+    Map<String, Object> proxyRuleMap = new HashMap<>();
+    proxyRuleMap.put("data", data);
+    proxyRuleMap.put("type", type);
+    return proxyRuleMap;
+  }
+
+  @Nullable
+  public Object getData() {
+    return data;
+  }
+
+  public void setData(@Nullable Object data) {
+    this.data = data;
+  }
+
+  public int getType() {
+    return type;
+  }
+
+  public void setType(int type) {
+    this.type = type;
+  }
+
+  @Nullable
+  public List<WebMessagePortCompatExt> getPorts() {
+    return ports;
+  }
+
+  public void setPorts(@Nullable List<WebMessagePortCompatExt> ports) {
+    this.ports = ports;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+
+    WebMessageCompatExt that = (WebMessageCompatExt) o;
+
+    if (type != that.type) return false;
+    if (!Objects.equals(data, that.data)) return false;
+    return Objects.equals(ports, that.ports);
+  }
+
+  @Override
+  public int hashCode() {
+    int result = data != null ? data.hashCode() : 0;
+    result = 31 * result + type;
+    result = 31 * result + (ports != null ? ports.hashCode() : 0);
+    return result;
+  }
+
+  @Override
+  public String toString() {
+    return "WebMessageCompatExt{" +
+            "data=" + data +
+            ", type=" + type +
+            ", ports=" + ports +
+            '}';
+  }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/types/WebMessagePortCompatExt.java

@@ -0,0 +1,78 @@
+package com.pichillilorenzo.flutter_inappwebview.types;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class WebMessagePortCompatExt {
+  private int index;
+  @NonNull
+  private String webMessageChannelId;
+
+  public WebMessagePortCompatExt(int index, @NonNull String webMessageChannelId) {
+    this.index = index;
+    this.webMessageChannelId = webMessageChannelId;
+  }
+
+  @Nullable
+  public static WebMessagePortCompatExt fromMap(@Nullable Map<String, Object> map) {
+    if (map == null) {
+      return null;
+    }
+    Integer index = (Integer) map.get("index");
+    String webMessageChannelId = (String) map.get("webMessageChannelId");
+    return new WebMessagePortCompatExt(index, webMessageChannelId);
+  }
+
+  public Map<String, Object> toMap() {
+    Map<String, Object> proxyRuleMap = new HashMap<>();
+    proxyRuleMap.put("index", index);
+    proxyRuleMap.put("webMessageChannelId", webMessageChannelId);
+    return proxyRuleMap;
+  }
+
+  public int getIndex() {
+    return index;
+  }
+
+  public void setIndex(int index) {
+    this.index = index;
+  }
+
+  @NonNull
+  public String getWebMessageChannelId() {
+    return webMessageChannelId;
+  }
+
+  public void setWebMessageChannelId(@NonNull String webMessageChannelId) {
+    this.webMessageChannelId = webMessageChannelId;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+
+    WebMessagePortCompatExt that = (WebMessagePortCompatExt) o;
+
+    if (index != that.index) return false;
+    return webMessageChannelId.equals(that.webMessageChannelId);
+  }
+
+  @Override
+  public int hashCode() {
+    int result = index;
+    result = 31 * result + webMessageChannelId.hashCode();
+    return result;
+  }
+
+  @Override
+  public String toString() {
+    return "WebMessagePortCompatExt{" +
+            "index=" + index +
+            ", webMessageChannelId='" + webMessageChannelId + '\'' +
+            '}';
+  }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/InAppWebViewManager.java

@@ -133,6 +133,12 @@ public class InAppWebViewManager extends ChannelDelegateImpl {
           result.success(false);
         }
         break;
+      case "disableWebView":
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+          WebView.disableWebView();
+        }
+        result.success(true);
+        break;
       case "disposeKeepAlive":
         final String keepAliveId = (String) call.argument("keepAliveId");
         if (keepAliveId != null) {

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/WebViewChannelDelegate.java

@@ -43,7 +43,9 @@ import com.pichillilorenzo.flutter_inappwebview.types.SslCertificateExt;
 import com.pichillilorenzo.flutter_inappwebview.types.SyncBaseCallbackResultImpl;
 import com.pichillilorenzo.flutter_inappwebview.types.URLRequest;
 import com.pichillilorenzo.flutter_inappwebview.types.UserScript;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessageCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.types.WebMessagePort;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessagePortCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.types.WebResourceErrorExt;
 import com.pichillilorenzo.flutter_inappwebview.types.WebResourceRequestExt;
 import com.pichillilorenzo.flutter_inappwebview.types.WebResourceResponseExt;
@@ -141,8 +143,7 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
               result.success(value);
             }
           });
-        }
+        } else {
-        else {
           result.success(null);
         }
         break;
@@ -210,8 +211,7 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
         if (webView != null) {
           Map<String, Object> screenshotConfiguration = (Map<String, Object>) call.argument("screenshotConfiguration");
           webView.takeScreenshot(screenshotConfiguration, result);
-        }
+        } else
-        else
           result.success(null);
         break;
       case setSettings:
@@ -282,8 +282,7 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
               result.success(success);
             }
           });
-        }
+        } else {
-        else {
           result.success(false);
         }
         break;
@@ -568,8 +567,7 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
               result.success(value);
             }
           });
-        }
+        } else {
-        else {
           result.success(null);
         }
         break;
@@ -598,27 +596,33 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
         break;
       case postWebMessage:
         if (webView != null && WebViewFeature.isFeatureSupported(WebViewFeature.POST_WEB_MESSAGE)) {
-          Map<String, Object> message = (Map<String, Object>) call.argument("message");
+          WebMessageCompatExt message = WebMessageCompatExt.fromMap((Map<String, Object>) call.argument("message"));
           String targetOrigin = (String) call.argument("targetOrigin");
           List<WebMessagePortCompat> compatPorts = new ArrayList<>();
-          List<WebMessagePort> ports = new ArrayList<>();
+          List<WebMessagePortCompatExt> portsExt = message.getPorts();
-          List<Map<String, Object>> portsMap = (List<Map<String, Object>>) message.get("ports");
+          if (portsExt != null) {
-          if (portsMap != null) {
+            for (WebMessagePortCompatExt portExt : portsExt) {
-            for (Map<String, Object> portMap : portsMap) {
+              WebMessageChannel webMessageChannel = webView.getWebMessageChannels().get(portExt.getWebMessageChannelId());
-              String webMessageChannelId = (String) portMap.get("webMessageChannelId");
-              Integer index = (Integer) portMap.get("index");
-              WebMessageChannel webMessageChannel = webView.getWebMessageChannels().get(webMessageChannelId);
               if (webMessageChannel != null) {
                 if (webView instanceof InAppWebView) {
-                  compatPorts.add(webMessageChannel.compatPorts.get(index));
+                  compatPorts.add(webMessageChannel.compatPorts.get(portExt.getIndex()));
                 }
               }
             }
           }
+          Object data = message.getData();
           if (webView instanceof InAppWebView) {
-            WebMessageCompat webMessage = new WebMessageCompat((String) message.get("data"), compatPorts.toArray(new WebMessagePortCompat[0]));
             try {
-              WebViewCompat.postWebMessage((WebView) webView, webMessage, Uri.parse(targetOrigin));
+              if (WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER) && data != null &&
+                      message.getType() == WebMessageCompat.TYPE_ARRAY_BUFFER) {
+                WebViewCompat.postWebMessage((WebView) webView,
+                        new WebMessageCompat((byte[]) data, compatPorts.toArray(new WebMessagePortCompat[0])),
+                        Uri.parse(targetOrigin));
+              } else {
+                WebViewCompat.postWebMessage((WebView) webView,
+                        new WebMessageCompat(data != null ? data.toString() : null, compatPorts.toArray(new WebMessagePortCompat[0])),
+                        Uri.parse(targetOrigin));
+              }
               result.success(true);
             } catch (Exception e) {
               result.error(LOG_TAG, e.getMessage(), null);
@@ -671,8 +675,7 @@ public class WebViewChannelDelegate extends ChannelDelegateImpl {
   }
 
   /**
-   * @deprecated
+   * @deprecated Use {@link FindInteractionChannelDelegate#onFindResultReceived} instead.
-   * Use {@link FindInteractionChannelDelegate#onFindResultReceived} instead.
    */
   @Deprecated
   public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/web_message/WebMessageChannel.java

@@ -11,6 +11,8 @@ import androidx.webkit.WebViewFeature;
 
 import com.pichillilorenzo.flutter_inappwebview.plugin_scripts_js.JavaScriptBridgeJS;
 import com.pichillilorenzo.flutter_inappwebview.types.Disposable;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessageCompatExt;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessagePortCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.webview.InAppWebViewInterface;
 import com.pichillilorenzo.flutter_inappwebview.types.WebMessagePort;
 import com.pichillilorenzo.flutter_inappwebview.webview.in_app_webview.InAppWebView;
@@ -77,7 +79,7 @@ public class WebMessageChannel implements Disposable {
           @Override
           public void onMessage(@NonNull WebMessagePortCompat port, @Nullable WebMessageCompat message) {
             super.onMessage(port, message);
-            webMessageChannel.onMessage(index, message != null ? message.getData() : null);
+            webMessageChannel.onMessage(index, message != null ? WebMessageCompatExt.fromMapWebMessageCompat(message) : null);
           }
         });
         result.success(true);
@@ -89,25 +91,28 @@ public class WebMessageChannel implements Disposable {
     }
   }
 
-  public void postMessageForInAppWebView(final Integer index, Map<String, Object> message, @NonNull MethodChannel.Result result) {
+  public void postMessageForInAppWebView(final Integer index, @NonNull WebMessageCompatExt message, @NonNull MethodChannel.Result result) {
     if (webView != null && compatPorts.size() > 0 &&
             WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_PORT_POST_MESSAGE)) {
       WebMessagePortCompat port = compatPorts.get(index);
       List<WebMessagePortCompat> webMessagePorts = new ArrayList<>();
-      List<Map<String, Object>> portsMap = (List<Map<String, Object>>) message.get("ports");
+      List<WebMessagePortCompatExt> portsExt = message.getPorts();
-      if (portsMap != null) {
+      if (portsExt != null) {
-        for (Map<String, Object> portMap : portsMap) {
+        for (WebMessagePortCompatExt portExt : portsExt) {
-          String webMessageChannelId = (String) portMap.get("webMessageChannelId");
+          WebMessageChannel webMessageChannel = webView.getWebMessageChannels().get(portExt.getWebMessageChannelId());
-          Integer portIndex = (Integer) portMap.get("index");
-          WebMessageChannel webMessageChannel = webView.getWebMessageChannels().get(webMessageChannelId);
           if (webMessageChannel != null) {
-            webMessagePorts.add(webMessageChannel.compatPorts.get(portIndex));
+            webMessagePorts.add(webMessageChannel.compatPorts.get(portExt.getIndex()));
           }
         }
       }
-      WebMessageCompat webMessage = new WebMessageCompat((String) message.get("data"), webMessagePorts.toArray(new WebMessagePortCompat[0]));
+      Object data = message.getData();
       try {
-        port.postMessage(webMessage);
+        if (WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER) && data != null &&
+                message.getType() == WebMessageCompat.TYPE_ARRAY_BUFFER) {
+          port.postMessage(new WebMessageCompat((byte[]) data, webMessagePorts.toArray(new WebMessagePortCompat[0])));
+        } else {
+          port.postMessage(new WebMessageCompat(data != null ? data.toString() : null, webMessagePorts.toArray(new WebMessagePortCompat[0])));
+        }
         result.success(true);
       } catch (Exception e) {
         result.error(LOG_TAG, e.getMessage(), null);
@@ -132,7 +137,7 @@ public class WebMessageChannel implements Disposable {
     }
   }
 
-  public void onMessage(int index, String message) {
+  public void onMessage(int index, @Nullable WebMessageCompatExt message) {
     if (channelDelegate != null) {
       channelDelegate.onMessage(index, message);
     }

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/web_message/WebMessageChannelChannelDelegate.java

@@ -5,6 +5,7 @@ import androidx.annotation.Nullable;
 
 import com.pichillilorenzo.flutter_inappwebview.types.ChannelDelegateImpl;
 import com.pichillilorenzo.flutter_inappwebview.types.Disposable;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessageCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.webview.in_app_webview.InAppWebView;
 
 import java.util.HashMap;
@@ -36,7 +37,7 @@ public class WebMessageChannelChannelDelegate extends ChannelDelegateImpl {
       case "postMessage":
         if (webMessageChannel != null && webMessageChannel.webView instanceof InAppWebView) {
           final Integer index = (Integer) call.argument("index");
-          Map<String, Object> message = (Map<String, Object>) call.argument("message");
+          WebMessageCompatExt message = WebMessageCompatExt.fromMap((Map<String, Object>) call.argument("message"));
           webMessageChannel.postMessageForInAppWebView(index, message, result);
         } else {
           result.success(false);
@@ -55,12 +56,12 @@ public class WebMessageChannelChannelDelegate extends ChannelDelegateImpl {
     }
   }
 
-  public void onMessage(int index, String message) {
+  public void onMessage(int index, @Nullable WebMessageCompatExt message) {
     MethodChannel channel = getChannel();
     if (channel == null) return;
     Map<String, Object> obj = new HashMap<>();
     obj.put("index", index);
-    obj.put("message", message );
+    obj.put("message", message != null ? message.toMap() : null);
     channel.invokeMethod("onMessage", obj);
   }
 

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/web_message/WebMessageListener.java

@@ -14,6 +14,7 @@ import androidx.webkit.WebViewFeature;
 import com.pichillilorenzo.flutter_inappwebview.Util;
 import com.pichillilorenzo.flutter_inappwebview.plugin_scripts_js.JavaScriptBridgeJS;
 import com.pichillilorenzo.flutter_inappwebview.types.Disposable;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessageCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.webview.InAppWebViewInterface;
 import com.pichillilorenzo.flutter_inappwebview.types.PluginScript;
 import com.pichillilorenzo.flutter_inappwebview.types.UserScriptInjectionTime;
@@ -61,7 +62,7 @@ public class WebMessageListener implements Disposable {
                                   boolean isMainFrame, @NonNull JavaScriptReplyProxy javaScriptReplyProxy) {
           replyProxy = javaScriptReplyProxy;
           if (channelDelegate != null) {
-            channelDelegate.onPostMessage(message.getData(),
+            channelDelegate.onPostMessage(WebMessageCompatExt.fromMapWebMessageCompat(message),
                     sourceOrigin.toString().equals("null") ? null : sourceOrigin.toString(),
                     isMainFrame);
           }
@@ -171,9 +172,16 @@ public class WebMessageListener implements Disposable {
     }
   }
 
-  public void postMessageForInAppWebView(String message, @NonNull MethodChannel.Result result) {
+  public void postMessageForInAppWebView(WebMessageCompatExt message, @NonNull MethodChannel.Result result) {
     if (replyProxy != null && WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_LISTENER)) {
-      replyProxy.postMessage(message);
+      Object data = message.getData();
+      if (data != null) {
+        if (WebViewFeature.isFeatureSupported(WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER) && message.getType() == WebMessageCompat.TYPE_ARRAY_BUFFER) {
+          replyProxy.postMessage((byte[]) data);
+        } else {
+          replyProxy.postMessage(data.toString());
+        }
+      }
     }
     result.success(true);
   }
@@ -196,12 +204,14 @@ public class WebMessageListener implements Disposable {
       if (rule.getHost() != null && rule.getHost().startsWith("[")) {
         try {
           IPv6 = Util.normalizeIPv6(rule.getHost().substring(1, rule.getHost().length() - 1));
-        } catch (Exception ignored) {}
+        } catch (Exception ignored) {
+        }
       }
       String hostIPv6 = null;
       try {
         hostIPv6 = Util.normalizeIPv6(host);
-      } catch (Exception ignored) {}
+      } catch (Exception ignored) {
+      }
 
       boolean schemeAllowed = rule.getScheme().equals(scheme);
 

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/web_message/WebMessageListenerChannelDelegate.java

@@ -2,10 +2,12 @@ package com.pichillilorenzo.flutter_inappwebview.webview.web_message;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.webkit.WebMessageCompat;
 
 import com.pichillilorenzo.flutter_inappwebview.headless_in_app_webview.HeadlessInAppWebView;
 import com.pichillilorenzo.flutter_inappwebview.types.ChannelDelegateImpl;
 import com.pichillilorenzo.flutter_inappwebview.types.Disposable;
+import com.pichillilorenzo.flutter_inappwebview.types.WebMessageCompatExt;
 import com.pichillilorenzo.flutter_inappwebview.webview.in_app_webview.InAppWebView;
 
 import java.util.HashMap;
@@ -28,7 +30,7 @@ public class WebMessageListenerChannelDelegate extends ChannelDelegateImpl {
     switch (call.method) {
       case "postMessage":
         if (webMessageListener != null && webMessageListener.webView instanceof InAppWebView) {
-          String message = (String) call.argument("message");
+          WebMessageCompatExt message = WebMessageCompatExt.fromMap((Map<String, Object>) call.argument("message"));
           webMessageListener.postMessageForInAppWebView(message, result);
         } else {
           result.success(false); 
@@ -39,11 +41,11 @@ public class WebMessageListenerChannelDelegate extends ChannelDelegateImpl {
     }
   }
 
-  public void onPostMessage(String message, String sourceOrigin, boolean isMainFrame) {
+  public void onPostMessage(@Nullable WebMessageCompatExt message, String sourceOrigin, boolean isMainFrame) {
     MethodChannel channel = getChannel();
     if (channel == null) return;
     Map<String, Object> obj = new HashMap<>();
-    obj.put("message", message);
+    obj.put("message", message != null ? message.toMap() : null);
     obj.put("sourceOrigin", sourceOrigin);
     obj.put("isMainFrame", isMainFrame);
     channel.invokeMethod("onPostMessage", obj);

dev_packages/flutter_inappwebview_internal_annotations/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.1.1
+
+- Added `ExchangeableObject.fromMapForceAllInline`.
+
 ## 1.1.0
 
 - Added `ExchangeableObject.copyMethod`.

dev_packages/flutter_inappwebview_internal_annotations/lib/src/exchangeable_object.dart

@@ -2,6 +2,7 @@ class ExchangeableObject {
   final bool toMapMethod;
   final bool toJsonMethod;
   final bool fromMapFactory;
+  final bool fromMapForceAllInline;
   final bool nullableFromMapFactory;
   final bool toStringMethod;
   final bool copyMethod;
@@ -10,6 +11,7 @@ class ExchangeableObject {
     this.toMapMethod = true,
     this.toJsonMethod = true,
     this.fromMapFactory = true,
+    this.fromMapForceAllInline = false,
     this.nullableFromMapFactory = true,
     this.toStringMethod = true,
     this.copyMethod = false

dev_packages/flutter_inappwebview_internal_annotations/pubspec.yaml

@@ -1,10 +1,10 @@
 name: flutter_inappwebview_internal_annotations
 description: Internal annotations used by the generator of flutter_inappwebview plugin
-version: 1.1.0
+version: 1.1.1
 homepage: https://github.com/pichillilorenzo/flutter_inappwebview
 
 environment:
-  sdk: ">=2.14.0 <3.0.0"
+  sdk: ">=2.15.0 <4.0.0"
 
 dev_dependencies:
   test: ^1.21.6

dev_packages/generators/lib/src/exchangeable_object_generator.dart

@@ -358,7 +358,7 @@ class ExchangeableObjectGenerator
                   constructorParameter.isFinal || fieldElement.isFinal ||
                   !Util.typeIsNullable(constructorParameter.type)) &&
               !constructorParameter.hasDefaultValue;
-          if (isRequiredParameter || fieldElement.isFinal) {
+          if (isRequiredParameter || fieldElement.isFinal || annotation.read("fromMapForceAllInline").boolValue) {
             requiredFields.add('$fieldName: $value,');
           } else {
             nonRequiredFields.add("instance.$fieldName = $value;");

dev_packages/generators/pubspec.lock

@@ -209,11 +209,10 @@ packages:
   flutter_inappwebview_internal_annotations:
     dependency: "direct main"
     description:
-      name: flutter_inappwebview_internal_annotations
+      path: "../flutter_inappwebview_internal_annotations"
-      sha256: "064a8ccbc76217dcd3b0fd6c6ea6f549e69b2849a0233b5bb46af9632c3ce2ff"
+      relative: true
-      url: "https://pub.dev"
+    source: path
-    source: hosted
+    version: "1.1.1"
-    version: "1.1.0"
   frontend_server_client:
     dependency: transitive
     description:

dev_packages/generators/pubspec.yaml

@@ -12,7 +12,7 @@ dependencies:
     sdk: flutter
   build: ^2.4.0
   source_gen: ^1.3.1
-  flutter_inappwebview_internal_annotations: ^1.1.0
+  flutter_inappwebview_internal_annotations: ^1.1.1
 
 dev_dependencies:
   build_runner: ^2.4.2

example/integration_test/in_app_webview/web_message.dart

@@ -10,7 +10,8 @@ void webMessage() {
         ].contains(defaultTargetPlatform);
 
   skippableGroup('WebMessage', () {
-    skippableTestWidgets('WebMessageChannel', (WidgetTester tester) async {
+    skippableTestWidgets('WebMessageChannel post String',
+        (WidgetTester tester) async {
       final Completer<InAppWebViewController> controllerCompleter =
           Completer<InAppWebViewController>();
       final Completer webMessageCompleter = Completer<String>();
@@ -61,7 +62,7 @@ void webMessage() {
 
               await port1.setWebMessageCallback((message) async {
                 await port1
-                    .postMessage(WebMessage(data: message! + " and back"));
+                    .postMessage(WebMessage(data: message!.data + " and back"));
               });
               await controller.postWebMessage(
                   message: WebMessage(data: "capturePort", ports: [port2]),
@@ -78,7 +79,94 @@ void webMessage() {
       expect(message, 'JavaScript To Native and back');
     });
 
-    skippableTestWidgets('WebMessageListener', (WidgetTester tester) async {
+    skippableTestWidgets('WebMessageChannel post ArrayBuffer',
+        (WidgetTester tester) async {
+      final Completer<InAppWebViewController> controllerCompleter =
+          Completer<InAppWebViewController>();
+      final Completer webMessageCompleter = Completer<String>();
+      await tester.pumpWidget(
+        Directionality(
+          textDirection: TextDirection.ltr,
+          child: InAppWebView(
+            key: GlobalKey(),
+            initialData: InAppWebViewInitialData(data: """
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>WebMessageChannel Test</title>
+</head>
+<body>
+    <button id="button" onclick="port.postMessage(stringToBuffer(input.value));" />Send</button>
+    <br />
+    <input id="input" type="text" value="JavaScript To Native" />
+
+    <script>
+      function bufferToString(buffer) {
+          return String.fromCharCode.apply(null, Array.from(new Uint8Array(buffer)));
+      }
+      
+      function stringToBuffer(value) {
+          var buffer = new ArrayBuffer(value.length);
+          var view = new Uint8Array(buffer);
+          for (var i = 0, length = value.length; i < length; i++) {
+              view[i] = value.charCodeAt(i);
+          }
+          return buffer;
+      }
+      
+      var port;
+      window.addEventListener('message', function(event) {
+          if (bufferToString(event.data) == 'capturePort') {
+              if (event.ports[0] != null) {
+                  port = event.ports[0];
+                  port.onmessage = function (event) {
+                      console.log(event.data);
+                  };
+              }
+          }
+      }, false);
+    </script>
+</body>
+</html>
+                      """),
+            onWebViewCreated: (controller) {
+              controllerCompleter.complete(controller);
+            },
+            onConsoleMessage: (controller, consoleMessage) {
+              webMessageCompleter.complete(consoleMessage.message);
+            },
+            onLoadStop: (controller, url) async {
+              var webMessageChannel =
+                  await controller.createWebMessageChannel();
+              var port1 = webMessageChannel!.port1;
+              var port2 = webMessageChannel.port2;
+
+              await port1.setWebMessageCallback((message) async {
+                await port1.postMessage(WebMessage(
+                    data: utf8.encode(utf8.decode(message!.data) + " and back"),
+                    type: WebMessageType.ARRAY_BUFFER));
+              });
+              await controller.postWebMessage(
+                  message: WebMessage(
+                      data: utf8.encode("capturePort"),
+                      type: WebMessageType.ARRAY_BUFFER,
+                      ports: [port2]),
+                  targetOrigin: WebUri("*"));
+              await controller.evaluateJavascript(
+                  source: "document.getElementById('button').click();");
+            },
+          ),
+        ),
+      );
+      await controllerCompleter.future;
+
+      final String message = await webMessageCompleter.future;
+      expect(message, 'JavaScript To Native and back');
+    });
+
+    skippableTestWidgets('WebMessageListener post String',
+        (WidgetTester tester) async {
       final Completer<InAppWebViewController> controllerCompleter =
           Completer<InAppWebViewController>();
       final Completer<void> pageLoaded = Completer<void>();
@@ -97,9 +185,10 @@ void webMessage() {
                   if (isMainFrame &&
                       (sourceOrigin.toString() + '/') ==
                           TEST_URL_EXAMPLE.toString()) {
-                    replyProxy.postMessage(message! + " and back");
+                    replyProxy.postMessage(
+                        WebMessage(data: message!.data + " and back"));
                   } else {
-                    replyProxy.postMessage("Nope");
+                    replyProxy.postMessage(WebMessage(data: "Nope"));
                   }
                 },
               ));
@@ -130,5 +219,77 @@ void webMessage() {
       final String message = await webMessageCompleter.future;
       expect(message, 'JavaScript To Native and back');
     });
+
+    skippableTestWidgets('WebMessageListener post ArrayBuffer',
+        (WidgetTester tester) async {
+      final Completer<InAppWebViewController> controllerCompleter =
+          Completer<InAppWebViewController>();
+      final Completer<void> pageLoaded = Completer<void>();
+      final Completer webMessageCompleter = Completer<String>();
+      await tester.pumpWidget(
+        Directionality(
+          textDirection: TextDirection.ltr,
+          child: InAppWebView(
+            key: GlobalKey(),
+            onWebViewCreated: (controller) async {
+              await controller.addWebMessageListener(WebMessageListener(
+                jsObjectName: "myTestObj",
+                allowedOriginRules: Set.from(["https://*.example.com"]),
+                onPostMessage:
+                    (message, sourceOrigin, isMainFrame, replyProxy) {
+                  if (isMainFrame &&
+                      (sourceOrigin.toString() + '/') ==
+                          TEST_URL_EXAMPLE.toString()) {
+                    replyProxy.postMessage(WebMessage(
+                        data: utf8
+                            .encode(utf8.decode(message!.data) + " and back"),
+                        type: WebMessageType.ARRAY_BUFFER));
+                  } else {
+                    replyProxy.postMessage(WebMessage(
+                        data: utf8.encode("Nope"),
+                        type: WebMessageType.ARRAY_BUFFER));
+                  }
+                },
+              ));
+              controllerCompleter.complete(controller);
+            },
+            onConsoleMessage: (controller, consoleMessage) {
+              webMessageCompleter.complete(consoleMessage.message);
+            },
+            onLoadStop: (controller, url) async {
+              if (url.toString() == TEST_URL_EXAMPLE.toString()) {
+                pageLoaded.complete();
+              }
+            },
+          ),
+        ),
+      );
+      final controller = await controllerCompleter.future;
+      await controller.loadUrl(urlRequest: URLRequest(url: TEST_URL_EXAMPLE));
+      await pageLoaded.future;
+
+      await controller.evaluateJavascript(source: """
+          function bufferToString(buffer) {
+              return String.fromCharCode.apply(null, Array.from(new Uint8Array(buffer)));
+          }
+          
+          function stringToBuffer(value) {
+              var buffer = new ArrayBuffer(value.length);
+              var view = new Uint8Array(buffer);
+              for (var i = 0, length = value.length; i < length; i++) {
+                  view[i] = value.charCodeAt(i);
+              }
+              return buffer;
+          }
+          
+          myTestObj.addEventListener('message', function(event) {
+            console.log(bufferToString(event.data));
+          });
+          myTestObj.postMessage(stringToBuffer('JavaScript To Native'));
+        """);
+
+      final String message = await webMessageCompleter.future;
+      expect(message, 'JavaScript To Native and back');
+    });
   }, skip: shouldSkip);
 }

example/integration_test/process_global_config/apply.dart

@@ -0,0 +1,38 @@
+part of 'main.dart';
+
+void apply() {
+  final shouldSkip = kIsWeb
+      ? true
+      : ![
+          TargetPlatform.android,
+        ].contains(defaultTargetPlatform);
+
+  skippableTestWidgets('apply', (WidgetTester tester) async {
+    await expectLater(
+        ProcessGlobalConfig.instance().apply(
+            settings: ProcessGlobalConfigSettings(
+                dataDirectorySuffix:
+                    (await WebViewFeature.isStartupFeatureSupported(
+                            WebViewFeature
+                                .STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX))
+                        ? 'suffix_inappwebviewexample'
+                        : null,
+                directoryBasePaths:
+                    (await WebViewFeature.isStartupFeatureSupported(
+                            WebViewFeature
+                                .STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS))
+                        ? ProcessGlobalConfigDirectoryBasePaths(
+                            cacheDirectoryBasePath:
+                                (await getApplicationDocumentsDirectory())
+                                        .absolute
+                                        .path +
+                                    '/inappwebviewexample/cache',
+                            dataDirectoryBasePath:
+                                (await getApplicationDocumentsDirectory())
+                                        .absolute
+                                        .path +
+                                    '/inappwebviewexample/data')
+                        : null)),
+        completes);
+  }, skip: shouldSkip);
+}

example/integration_test/process_global_config/main.dart

@@ -0,0 +1,20 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_inappwebview/flutter_inappwebview.dart';
+import 'package:path_provider/path_provider.dart';
+import '../constants.dart';
+import '../env.dart';
+import '../util.dart';
+
+part 'apply.dart';
+
+void main() {
+  final shouldSkip = kIsWeb;
+
+  skippableGroup('Process Global Config', () {
+    apply();
+  }, skip: shouldSkip);
+}

example/integration_test/webview_flutter_test.dart

@@ -2,6 +2,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter_inappwebview/flutter_inappwebview.dart';
 import 'package:integration_test/integration_test.dart';
 
+import 'process_global_config/main.dart' as process_global_config_tests;
 import 'in_app_webview/main.dart' as in_app_webview_tests;
 import 'find_interaction_controller/main.dart'
     as find_interaction_controller_tests;
@@ -34,6 +35,7 @@ void main() {
   FindInteractionController.debugLoggingSettings.usePrint = true;
   FindInteractionController.debugLoggingSettings.maxLogMessageLength = 7000;
 
+  process_global_config_tests.main();
   in_app_webview_tests.main();
   find_interaction_controller_tests.main();
   service_worker_controller_tests.main();

ios/Classes/InAppWebView/InAppWebView.swift

@@ -2887,14 +2887,22 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
             let body = message.body as! [String: Any?]
             let webMessageChannelId = body["webMessageChannelId"] as! String
             let index = body["index"] as! Int64
-            let webMessage = body["message"] as? String
+            var webMessage: WebMessage? = nil
+            if let webMessageMap = body["message"] as? [String : Any?] {
+                webMessage = WebMessage.fromMap(map: webMessageMap)
+            }
+            
             if let webMessageChannel = webMessageChannels[webMessageChannelId] {
                 webMessageChannel.channelDelegate?.onMessage(index: index, message: webMessage)
             }
         } else if message.name == "onWebMessageListenerPostMessageReceived" {
             let body = message.body as! [String: Any?]
             let jsObjectName = body["jsObjectName"] as! String
-            let messageData = body["message"] as? String
+            var webMessage: WebMessage? = nil
+            if let webMessageMap = body["message"] as? [String : Any?] {
+                webMessage = WebMessage.fromMap(map: webMessageMap)
+            }
+            
             if let webMessageListener = webMessageListeners.first(where: ({($0.jsObjectName == jsObjectName)})) {
                 let isMainFrame = message.frameInfo.isMainFrame
                 
@@ -2920,7 +2928,7 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
                 if let scheme = scheme, !scheme.isEmpty, let host = host, !host.isEmpty {
                     sourceOrigin = URL(string: "\(scheme)://\(host)\(port != nil && port != 0 ? ":" + String(port!) : "")")
                 }
-                webMessageListener.channelDelegate?.onPostMessage(message: messageData, sourceOrigin: sourceOrigin, isMainFrame: isMainFrame)
+                webMessageListener.channelDelegate?.onPostMessage(message: webMessage, sourceOrigin: sourceOrigin, isMainFrame: isMainFrame)
             }
         }
     }
@@ -3190,11 +3198,11 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
             }
             portsString = "[" + portArrayString.joined(separator: ", ") + "]"
         }
-        let data = message.data?.replacingOccurrences(of: "\'", with: "\\'") ?? "null"
+        
         let url = URL(string: targetOrigin)?.absoluteString ?? "*"
         let source = """
         (function() {
-            window.postMessage('\(data)', '\(url)', \(portsString));
+            window.postMessage(\(message.jsData), '\(url)', \(portsString));
         })();
         """
         evaluateJavascript(source: source, completionHandler: completionHandler)

ios/Classes/InAppWebView/WebMessage/WebMessageChannel.swift

@@ -25,8 +25,8 @@ public class WebMessageChannel : FlutterMethodCallDelegate {
             self.channelDelegate = WebMessageChannelChannelDelegate(webMessageChannel: self, channel: channel)
         }
         self.ports = [
-            WebMessagePort(name: "port1", webMessageChannel: self),
+            WebMessagePort(name: "port1", index: 0, webMessageChannelId: self.id, webMessageChannel: self),
-            WebMessagePort(name: "port2", webMessageChannel: self)
+            WebMessagePort(name: "port2", index: 1, webMessageChannelId: self.id, webMessageChannel: self)
         ]
     }
     

ios/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift

@@ -39,22 +39,20 @@ public class WebMessageChannelChannelDelegate : ChannelDelegate {
             if let webView = webMessageChannel?.webView, let ports = webMessageChannel?.ports, ports.count > 0 {
                 let index = arguments!["index"] as! Int
                 let port = ports[index]
-                let message = arguments!["message"] as! [String: Any?]
+                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 
-                var webMessagePorts: [WebMessagePort] = []
+                var ports: [WebMessagePort] = []
-                let portsMap = message["ports"] as? [[String: Any?]]
+                if let notConnectedPorts = message.ports {
-                if let portsMap = portsMap {
+                    for notConnectedPort in notConnectedPorts {
-                    for portMap in portsMap {
+                        if let webMessageChannel = webView.webMessageChannels[notConnectedPort.webMessageChannelId] {
-                        let webMessageChannelId = portMap["webMessageChannelId"] as! String
+                            ports.append(webMessageChannel.ports[Int(notConnectedPort.index)])
-                        let index = portMap["index"] as! Int
-                        if let webMessageChannel = webView.webMessageChannels[webMessageChannelId] {
-                            webMessagePorts.append(webMessageChannel.ports[index])
                         }
                     }
                 }
-                let webMessage = WebMessage(data: message["data"] as? String, ports: webMessagePorts)
+                message.ports = ports
+                
                 do {
-                    try port.postMessage(message: webMessage) { (_) in
+                    try port.postMessage(message: message) { (_) in
                         result(true)
                     }
                 } catch let error as NSError {
@@ -85,10 +83,10 @@ public class WebMessageChannelChannelDelegate : ChannelDelegate {
         }
     }
     
-    public func onMessage(index: Int64, message: String?) {
+    public func onMessage(index: Int64, message: WebMessage?) {
         let arguments: [String:Any?] = [
             "index": index,
-            "message": message
+            "message": message?.toMap()
         ]
         channel?.invokeMethod("onMessage", arguments: arguments)
     }

ios/Classes/InAppWebView/WebMessage/WebMessageListenerChannelDelegate.swift

@@ -22,12 +22,13 @@ public class WebMessageListenerChannelDelegate : ChannelDelegate {
         case "postMessage":
             if let webView = webMessageListener?.webView, let jsObjectName = webMessageListener?.jsObjectName {
                 let jsObjectNameEscaped = jsObjectName.replacingOccurrences(of: "\'", with: "\\'")
-                let messageEscaped = (arguments!["message"] as! String).replacingOccurrences(of: "\'", with: "\\'")
+                let message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
+                
                 let source = """
                 (function() {
                     var webMessageListener = window['\(jsObjectNameEscaped)'];
                     if (webMessageListener != null) {
-                        var event = {data: '\(messageEscaped)'};
+                        var event = {data: \(message.jsData)};
                         if (webMessageListener.onmessage != null) {
                             webMessageListener.onmessage(event);
                         }
@@ -50,9 +51,9 @@ public class WebMessageListenerChannelDelegate : ChannelDelegate {
         }
     }
     
-    public func onPostMessage(message: String?, sourceOrigin: URL?, isMainFrame: Bool) {
+    public func onPostMessage(message: WebMessage?, sourceOrigin: URL?, isMainFrame: Bool) {
         let arguments: [String:Any?] = [
-            "message": message,
+            "message": message?.toMap(),
             "sourceOrigin": sourceOrigin?.absoluteString,
             "isMainFrame": isMainFrame
         ]

ios/Classes/InAppWebView/WebViewChannelDelegate.swift

@@ -509,23 +509,21 @@ public class WebViewChannelDelegate : ChannelDelegate {
             break
         case .postWebMessage:
             if let webView = webView {
-                let message = arguments!["message"] as! [String: Any?]
+                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 let targetOrigin = arguments!["targetOrigin"] as! String
                 
                 var ports: [WebMessagePort] = []
-                let portsMap = message["ports"] as? [[String: Any?]]
+                if let notConnectedPorts = message.ports {
-                if let portsMap = portsMap {
+                    for notConnectedPort in notConnectedPorts {
-                    for portMap in portsMap {
+                        if let webMessageChannel = webView.webMessageChannels[notConnectedPort.webMessageChannelId] {
-                        let webMessageChannelId = portMap["webMessageChannelId"] as! String
+                            ports.append(webMessageChannel.ports[Int(notConnectedPort.index)])
-                        let index = portMap["index"] as! Int
-                        if let webMessageChannel = webView.webMessageChannels[webMessageChannelId] {
-                            ports.append(webMessageChannel.ports[index])
                         }
                     }
                 }
-                let webMessage = WebMessage(data: message["data"] as? String, ports: ports)
+                message.ports = ports
+                
                 do {
-                    try webView.postWebMessage(message: webMessage, targetOrigin: targetOrigin) { (_) in
+                    try webView.postWebMessage(message: message, targetOrigin: targetOrigin) { (_) in
                         result(true)
                     }
                 } catch let error as NSError {

ios/Classes/PluginScriptsJS/WebMessageListenerJS.swift

@@ -13,7 +13,11 @@ function FlutterInAppWebViewWebMessageListener(jsObjectName) {
     this.listeners = [];
     this.onmessage = null;
 }
-FlutterInAppWebViewWebMessageListener.prototype.postMessage = function(message) {
+FlutterInAppWebViewWebMessageListener.prototype.postMessage = function(data) {
+    var message = {
+        "data": window.ArrayBuffer != null && data instanceof ArrayBuffer ? Array.from(new Uint8Array(data)) : (data != null ? data.toString() : null),
+        "type": window.ArrayBuffer != null && data instanceof ArrayBuffer ? 1 : 0
+    };
     window.webkit.messageHandlers['onWebMessageListenerPostMessageReceived'].postMessage({jsObjectName: this.jsObjectName, message: message});
 };
 FlutterInAppWebViewWebMessageListener.prototype.addEventListener = function(type, listener) {

ios/Classes/Types/WebMessage.swift

@@ -7,16 +7,53 @@
 
 import Foundation
 
-public class WebMessage : NSObject {
+public class WebMessage : NSObject, Disposable {
-    var data: String?
+    var data: Any?
+    var type: WebMessageType
     var ports: [WebMessagePort]?
     
-    public init(data: String?, ports: [WebMessagePort]?) {
+    var jsData: String {
+        var jsData: String = "null"
+        if let messageData = data {
+            if type == .arrayBuffer, let messageDataArrayBuffer = messageData as? FlutterStandardTypedData {
+                jsData = "new Uint8Array(\(Array(messageDataArrayBuffer.data))).buffer"
+            } else if let messageDataString = messageData as? String {
+                jsData = "'\(messageDataString.replacingOccurrences(of: "\'", with: "\\'"))'"
+            }
+        }
+        return jsData
+    }
+    
+    public init(data: Any?, type: WebMessageType, ports: [WebMessagePort]?) {
+        self.type = type
         super.init()
         self.data = data
         self.ports = ports
     }
     
+    public static func fromMap(map: [String: Any?]) -> WebMessage {
+        let portMapList = map["ports"] as? [[String: Any?]]
+        var ports: [WebMessagePort]? = nil
+        if let portMapList = portMapList, !portMapList.isEmpty {
+            ports = []
+            portMapList.forEach { (portMap) in
+                ports?.append(WebMessagePort.fromMap(map: portMap))
+            }
+        }
+        
+        return WebMessage(
+            data: map["data"] as? Any,
+            type: WebMessageType.init(rawValue: map["type"] as! Int)!,
+            ports: ports)
+    }
+    
+    public func toMap () -> [String: Any?] {
+        return [
+            "data": type == .arrayBuffer && data is [UInt8] ? Data(data as! [UInt8]) : data,
+            "type": type.rawValue
+        ]
+    }
+    
     public func dispose() {
         ports?.removeAll()
     }
@@ -26,3 +63,8 @@ public class WebMessage : NSObject {
         dispose()
     }
 }
+
+public enum WebMessageType: Int {
+    case string = 0
+    case arrayBuffer = 1
+}

ios/Classes/Types/WebMessagePort.swift

@@ -9,13 +9,17 @@ import Foundation
 
 public class WebMessagePort : NSObject {
     var name: String
+    var index: Int64
+    var webMessageChannelId: String
     var webMessageChannel: WebMessageChannel?
     var isClosed = false
     var isTransferred = false
     var isStarted = false
     
-    public init(name: String, webMessageChannel: WebMessageChannel) {
+    public init(name: String, index: Int64, webMessageChannelId: String, webMessageChannel: WebMessageChannel?) {
         self.name = name
+        self.index = index
+        self.webMessageChannelId = webMessageChannelId
         super.init()
         self.webMessageChannel = webMessageChannel
     }
@@ -35,7 +39,10 @@ public class WebMessagePort : NSObject {
                         window.webkit.messageHandlers["onWebMessagePortMessageReceived"].postMessage({
                             "webMessageChannelId": "\(webMessageChannel.id)",
                             "index": \(String(index)),
-                            "message": event.data
+                            "message": {
+                                "data": window.ArrayBuffer != null && event.data instanceof ArrayBuffer ? Array.from(new Uint8Array(event.data)) : (event.data != null ? event.data.toString() : null),
+                                "type": window.ArrayBuffer != null && event.data instanceof ArrayBuffer ? 1 : 0
+                            }
                         });
                     }
                 }
@@ -71,12 +78,12 @@ public class WebMessagePort : NSObject {
                 }
                 portsString = "[" + portArrayString.joined(separator: ", ") + "]"
             }
-            let data = message.data?.replacingOccurrences(of: "\'", with: "\\'") ?? "null"
+            
             let source = """
             (function() {
                 var webMessageChannel = \(WEB_MESSAGE_CHANNELS_VARIABLE_NAME)["\(webMessageChannel.id)"];
                 if (webMessageChannel != null) {
-                    webMessageChannel.\(self.name).postMessage('\(data)', \(portsString));
+                    webMessageChannel.\(self.name).postMessage(\(message.jsData), \(portsString));
                 }
             })();
             """
@@ -111,6 +118,23 @@ public class WebMessagePort : NSObject {
         }
     }
     
+    public static func fromMap(map: [String: Any?]) -> WebMessagePort {
+        let index = map["index"] as! Int64
+        return WebMessagePort(
+            name: "port\(String(index + 1))",
+            index: index,
+            webMessageChannelId: map["webMessageChannelId"] as! String,
+            webMessageChannel: nil)
+    }
+    
+    public func toMap () -> [String: Any?] {
+        return [
+            "name": name,
+            "index": index,
+            "webMessageChannelId": webMessageChannelId
+        ]
+    }
+    
     public func dispose() {
         isClosed = true
         webMessageChannel = nil

lib/src/android/main.dart

@@ -9,3 +9,8 @@ export 'webview_asset_loader.dart'
         ResourcesPathHandler,
         InternalStoragePathHandler;
 export 'tracing_controller.dart' show TracingController, TracingSettings;
+export 'process_global_config.dart'
+    show
+        ProcessGlobalConfig,
+        ProcessGlobalConfigSettings,
+        ProcessGlobalConfigDirectoryBasePaths;

lib/src/android/process_global_config.dart

@@ -0,0 +1,150 @@
+import 'dart:async';
+import 'package:flutter/services.dart';
+import 'package:flutter_inappwebview_internal_annotations/flutter_inappwebview_internal_annotations.dart';
+import 'webview_feature.dart';
+import '../in_app_webview/webview.dart';
+import '../in_app_webview/in_app_webview_controller.dart';
+import '../cookie_manager.dart';
+
+part 'process_global_config.g.dart';
+
+///Process Global Configuration for [WebView].
+///WebView has some process-global configuration parameters
+///that cannot be changed once WebView has been loaded.
+///This class allows apps to set these parameters.
+///
+///If it is used, the configuration should be set and apply should
+///be called prior to loading WebView into the calling process.
+///Most of the methods in `android.webkit` and `androidx.webkit` packages load WebView,
+///so the configuration should be applied before calling any of these methods.
+///
+///The following code configures the data directory suffix that WebView uses and
+///then applies the configuration. WebView uses this configuration when it is loaded.
+///
+///[apply] can only be called once.
+///
+///Only a single thread should access this class at a given time.
+///
+///The configuration should be set up as early as possible during application startup,
+///to ensure that it happens before any other thread can call a method that loads [WebView].
+///
+///**Supported Platforms/Implementations**:
+///- Android native WebView ([Official API - ProcessGlobalConfig](https://developer.android.com/reference/androidx/webkit/ProcessGlobalConfig))
+class ProcessGlobalConfig {
+  static ProcessGlobalConfig? _instance;
+  static const MethodChannel _channel = const MethodChannel(
+      'com.pichillilorenzo/flutter_inappwebview_processglobalconfig');
+
+  ProcessGlobalConfig._();
+
+  ///Gets the [ProcessGlobalConfig] shared instance.
+  static ProcessGlobalConfig instance() {
+    return (_instance != null) ? _instance! : _init();
+  }
+
+  static ProcessGlobalConfig _init() {
+    _channel.setMethodCallHandler((call) async {
+      try {
+        return await _handleMethod(call);
+      } on Error catch (e) {
+        print(e);
+        print(e.stackTrace);
+      }
+    });
+    _instance = ProcessGlobalConfig._();
+    return _instance!;
+  }
+
+  static Future<dynamic> _handleMethod(MethodCall call) async {
+    // ProcessGlobalConfig controller = ProcessGlobalConfig.instance();
+    switch (call.method) {
+      default:
+        throw UnimplementedError("Unimplemented ${call.method} method");
+    }
+    // return null;
+  }
+
+  ///Applies the configuration to be used by [WebView] on loading.
+  ///This method can only be called once.
+  ///
+  ///Calling this method will not cause [WebView] to be loaded and will not block the calling thread.
+  ///
+  ///**Supported Platforms/Implementations**:
+  ///- Android native WebView ([Official API - ProcessGlobalConfig.apply](https://developer.android.com/reference/androidx/webkit/ProcessGlobalConfig#apply(androidx.webkit.ProcessGlobalConfig)))
+  Future<void> apply({required ProcessGlobalConfigSettings settings}) async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    args.putIfAbsent("settings", () => settings.toMap());
+    return await _channel.invokeMethod('apply', args);
+  }
+}
+
+///Class that represents the settings used to configure the [ProcessGlobalConfig].
+///
+///**Supported Platforms/Implementations**:
+///- Android native WebView
+@ExchangeableObject(copyMethod: true)
+class ProcessGlobalConfigSettings_ {
+  ///The directory name suffix to be used for the current process.
+  ///Must not contain a path separator and should not be empty.
+  ///
+  ///Define the directory used to store WebView data for the current process.
+  ///The provided suffix will be used when constructing data and cache directory paths.
+  ///If this API is not called, no suffix will be used.
+  ///Each directory can be used by only one process in the application.
+  ///If more than one process in an app wishes to use WebView,
+  ///only one process can use the default directory,
+  ///and other processes must call this API to define a unique suffix.
+  ///
+  ///This means that different processes in the same application cannot directly share [WebView]-related data,
+  ///since the data directories must be distinct.
+  ///Applications that use this API may have to explicitly pass data between processes.
+  ///For example, login cookies may have to be copied from one process's cookie jar to the other using [CookieManager] if both processes' WebViews are intended to be logged in.
+  ///
+  ///Most applications should simply ensure that all components of the app that rely
+  ///on WebView are in the same process, to avoid needing multiple data directories.
+  ///The [InAppWebViewController.disableWebView] method can be used to ensure that the other processes do not use WebView by accident in this case.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX] feature is supported.
+  String? dataDirectorySuffix;
+
+  ///Set the base directories that [WebView] will use for the current process.
+  ///If this method is not used, [WebView] uses the default base paths defined by the Android framework.
+  ///
+  ///WebView will create and use a subdirectory under each of the base paths supplied to this method.
+  ///
+  ///This method can be used in conjunction with setDataDirectorySuffix.
+  ///A different subdirectory is created for each suffix.
+  ///
+  ///The base paths must be absolute paths.
+  ///
+  ///The data directory must not be under the Android cache directory,
+  ///as Android may delete cache files when disk space is low and WebView may not function properly if this occurs.
+  ///Refer to [this link](https://developer.android.com/training/data-storage/app-specific#internal-remove-cache).
+  ///
+  ///If the specified directories already exist then they must be readable and writable by the current process.
+  ///If they do not already exist, [WebView] will attempt to create them during initialization, along with any missing parent directories.
+  ///In such a case, the directory in which [WebView] creates missing directories must be readable and writable by the current process.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS] feature is supported.
+  ProcessGlobalConfigDirectoryBasePaths_? directoryBasePaths;
+
+  ProcessGlobalConfigSettings_(
+      {this.dataDirectorySuffix, this.directoryBasePaths});
+}
+
+///Class that represents the settings used to configure the [ProcessGlobalConfigSettings.directoryBasePaths].
+///
+///**Supported Platforms/Implementations**:
+///- Android native WebView ([Official API - ProxyConfig](https://developer.android.com/reference/androidx/webkit/ProxyConfig))
+@ExchangeableObject()
+class ProcessGlobalConfigDirectoryBasePaths_ {
+  ///The absolute base path for the WebView data directory.
+  String dataDirectoryBasePath;
+
+  ///The absolute base path for the WebView cache directory.
+  String cacheDirectoryBasePath;
+
+  ProcessGlobalConfigDirectoryBasePaths_(
+      {required this.dataDirectoryBasePath,
+      required this.cacheDirectoryBasePath});
+}

lib/src/android/process_global_config.g.dart

@@ -0,0 +1,142 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'process_global_config.dart';
+
+// **************************************************************************
+// ExchangeableObjectGenerator
+// **************************************************************************
+
+///Class that represents the settings used to configure the [ProcessGlobalConfig].
+///
+///**Supported Platforms/Implementations**:
+///- Android native WebView
+class ProcessGlobalConfigSettings {
+  ///The directory name suffix to be used for the current process.
+  ///Must not contain a path separator and should not be empty.
+  ///
+  ///Define the directory used to store WebView data for the current process.
+  ///The provided suffix will be used when constructing data and cache directory paths.
+  ///If this API is not called, no suffix will be used.
+  ///Each directory can be used by only one process in the application.
+  ///If more than one process in an app wishes to use WebView,
+  ///only one process can use the default directory,
+  ///and other processes must call this API to define a unique suffix.
+  ///
+  ///This means that different processes in the same application cannot directly share [WebView]-related data,
+  ///since the data directories must be distinct.
+  ///Applications that use this API may have to explicitly pass data between processes.
+  ///For example, login cookies may have to be copied from one process's cookie jar to the other using [CookieManager] if both processes' WebViews are intended to be logged in.
+  ///
+  ///Most applications should simply ensure that all components of the app that rely
+  ///on WebView are in the same process, to avoid needing multiple data directories.
+  ///The [InAppWebViewController.disableWebView] method can be used to ensure that the other processes do not use WebView by accident in this case.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX] feature is supported.
+  String? dataDirectorySuffix;
+
+  ///Set the base directories that [WebView] will use for the current process.
+  ///If this method is not used, [WebView] uses the default base paths defined by the Android framework.
+  ///
+  ///WebView will create and use a subdirectory under each of the base paths supplied to this method.
+  ///
+  ///This method can be used in conjunction with setDataDirectorySuffix.
+  ///A different subdirectory is created for each suffix.
+  ///
+  ///The base paths must be absolute paths.
+  ///
+  ///The data directory must not be under the Android cache directory,
+  ///as Android may delete cache files when disk space is low and WebView may not function properly if this occurs.
+  ///Refer to [this link](https://developer.android.com/training/data-storage/app-specific#internal-remove-cache).
+  ///
+  ///If the specified directories already exist then they must be readable and writable by the current process.
+  ///If they do not already exist, [WebView] will attempt to create them during initialization, along with any missing parent directories.
+  ///In such a case, the directory in which [WebView] creates missing directories must be readable and writable by the current process.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS] feature is supported.
+  ProcessGlobalConfigDirectoryBasePaths? directoryBasePaths;
+  ProcessGlobalConfigSettings(
+      {this.dataDirectorySuffix, this.directoryBasePaths});
+
+  ///Gets a possible [ProcessGlobalConfigSettings] instance from a [Map] value.
+  static ProcessGlobalConfigSettings? fromMap(Map<String, dynamic>? map) {
+    if (map == null) {
+      return null;
+    }
+    final instance = ProcessGlobalConfigSettings(
+      dataDirectorySuffix: map['dataDirectorySuffix'],
+      directoryBasePaths: ProcessGlobalConfigDirectoryBasePaths.fromMap(
+          map['directoryBasePaths']?.cast<String, dynamic>()),
+    );
+    return instance;
+  }
+
+  ///Converts instance to a map.
+  Map<String, dynamic> toMap() {
+    return {
+      "dataDirectorySuffix": dataDirectorySuffix,
+      "directoryBasePaths": directoryBasePaths?.toMap(),
+    };
+  }
+
+  ///Converts instance to a map.
+  Map<String, dynamic> toJson() {
+    return toMap();
+  }
+
+  ///Returns a copy of ProcessGlobalConfigSettings.
+  ProcessGlobalConfigSettings copy() {
+    return ProcessGlobalConfigSettings.fromMap(toMap()) ??
+        ProcessGlobalConfigSettings();
+  }
+
+  @override
+  String toString() {
+    return 'ProcessGlobalConfigSettings{dataDirectorySuffix: $dataDirectorySuffix, directoryBasePaths: $directoryBasePaths}';
+  }
+}
+
+///Class that represents the settings used to configure the [ProcessGlobalConfigSettings.directoryBasePaths].
+///
+///**Supported Platforms/Implementations**:
+///- Android native WebView ([Official API - ProxyConfig](https://developer.android.com/reference/androidx/webkit/ProxyConfig))
+class ProcessGlobalConfigDirectoryBasePaths {
+  ///The absolute base path for the WebView cache directory.
+  String cacheDirectoryBasePath;
+
+  ///The absolute base path for the WebView data directory.
+  String dataDirectoryBasePath;
+  ProcessGlobalConfigDirectoryBasePaths(
+      {required this.cacheDirectoryBasePath,
+      required this.dataDirectoryBasePath});
+
+  ///Gets a possible [ProcessGlobalConfigDirectoryBasePaths] instance from a [Map] value.
+  static ProcessGlobalConfigDirectoryBasePaths? fromMap(
+      Map<String, dynamic>? map) {
+    if (map == null) {
+      return null;
+    }
+    final instance = ProcessGlobalConfigDirectoryBasePaths(
+      cacheDirectoryBasePath: map['cacheDirectoryBasePath'],
+      dataDirectoryBasePath: map['dataDirectoryBasePath'],
+    );
+    return instance;
+  }
+
+  ///Converts instance to a map.
+  Map<String, dynamic> toMap() {
+    return {
+      "cacheDirectoryBasePath": cacheDirectoryBasePath,
+      "dataDirectoryBasePath": dataDirectoryBasePath,
+    };
+  }
+
+  ///Converts instance to a map.
+  Map<String, dynamic> toJson() {
+    return toMap();
+  }
+
+  @override
+  String toString() {
+    return 'ProcessGlobalConfigDirectoryBasePaths{cacheDirectoryBasePath: $cacheDirectoryBasePath, dataDirectoryBasePath: $dataDirectoryBasePath}';
+  }
+}

lib/src/android/proxy_controller.dart

@@ -139,41 +139,4 @@ class ProxySettings_ {
       this.bypassSimpleHostnames,
       this.removeImplicitRules,
       this.reverseBypassEnabled = false});
-
-  // Map<String, dynamic> toMap() {
-  //   return {
-  //     "bypassRules": bypassRules,
-  //     "directs": directs,
-  //     "proxyRules": proxyRules.map((e) => e.toMap()).toList(),
-  //     "bypassSimpleHostnames": bypassSimpleHostnames,
-  //     "removeImplicitRules": removeImplicitRules,
-  //     "reverseBypassEnabled": reverseBypassEnabled
-  //   };
-  // }
-  //
-  // static ProxySettings fromMap(Map<String, dynamic> map) {
-  //   var settings = ProxySettings();
-  //   settings.bypassRules = map["bypassRules"];
-  //   settings.directs = map["directs"];
-  //   settings.proxyRules = (map["proxyRules"].cast<Map<String, dynamic>>()
-  //           as List<Map<String, dynamic>>)
-  //       .map((e) => ProxyRule.fromMap(e)) as List<ProxyRule>;
-  //   settings.bypassSimpleHostnames = map["bypassSimpleHostnames"];
-  //   settings.removeImplicitRules = map["removeImplicitRules"];
-  //   settings.reverseBypassEnabled = map["reverseBypassEnabled"];
-  //   return settings;
-  // }
-  //
-  // Map<String, dynamic> toJson() {
-  //   return this.toMap();
-  // }
-  //
-  // @override
-  // String toString() {
-  //   return 'ProxySettings{bypassRules: $bypassRules, directs: $directs, proxyRules: $proxyRules, bypassSimpleHostnames: $bypassSimpleHostnames, removeImplicitRules: $removeImplicitRules, reverseBypassEnabled: $reverseBypassEnabled}';
-  // }
-  //
-  // ProxySettings copy() {
-  //   return ProxySettings.fromMap(this.toMap());
-  // }
 }

lib/src/android/webview_feature.dart

@@ -1,7 +1,8 @@
 import 'dart:async';
 import 'package:flutter/services.dart';
-import 'package:flutter_inappwebview/src/cookie_manager.dart';
 import 'package:flutter_inappwebview_internal_annotations/flutter_inappwebview_internal_annotations.dart';
+import 'process_global_config.dart';
+import '../cookie_manager.dart';
 import '../in_app_webview/in_app_webview_controller.dart';
 import '../in_app_webview/in_app_webview_settings.dart';
 import 'proxy_controller.dart';
@@ -29,18 +30,18 @@ class WebViewFeature_ {
   @ExchangeableObjectMethod(ignore: true)
   String toNativeValue() => _value;
 
-  ///This feature covers [InAppWebViewController.createWebMessageChannel].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.createWebMessageChannel].
   static const CREATE_WEB_MESSAGE_CHANNEL =
       const WebViewFeature_._internal("CREATE_WEB_MESSAGE_CHANNEL");
 
-  ///This feature covers [InAppWebViewSettings.disabledActionModeMenuItems].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.disabledActionModeMenuItems].
   static const DISABLED_ACTION_MODE_MENU_ITEMS =
       const WebViewFeature_._internal("DISABLED_ACTION_MODE_MENU_ITEMS");
 
-  ///This feature covers [InAppWebViewSettings.forceDark].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.forceDark].
   static const FORCE_DARK = const WebViewFeature_._internal("FORCE_DARK");
 
-  ///This feature covers [InAppWebViewSettings.forceDarkStrategy].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.forceDarkStrategy].
   static const FORCE_DARK_STRATEGY =
       const WebViewFeature_._internal("FORCE_DARK_STRATEGY");
 
@@ -59,19 +60,19 @@ class WebViewFeature_ {
   ///
   static const MULTI_PROCESS = const WebViewFeature_._internal("MULTI_PROCESS");
 
-  ///This feature covers [InAppWebViewSettings.offscreenPreRaster].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.offscreenPreRaster].
   static const OFF_SCREEN_PRERASTER =
       const WebViewFeature_._internal("OFF_SCREEN_PRERASTER");
 
-  ///This feature covers [InAppWebViewController.postWebMessage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.postWebMessage].
   static const POST_WEB_MESSAGE =
       const WebViewFeature_._internal("POST_WEB_MESSAGE");
 
-  ///This feature covers [ProxyController.setProxyOverride] and [ProxyController.clearProxyOverride].
+  ///Feature for [isFeatureSupported]. This feature covers [ProxyController.setProxyOverride] and [ProxyController.clearProxyOverride].
   static const PROXY_OVERRIDE =
       const WebViewFeature_._internal("PROXY_OVERRIDE");
 
-  ///This feature covers [ProxySettings.reverseBypassEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [ProxySettings.reverseBypassEnabled].
   static const PROXY_OVERRIDE_REVERSE_BYPASS =
       const WebViewFeature_._internal("PROXY_OVERRIDE_REVERSE_BYPASS");
 
@@ -83,11 +84,11 @@ class WebViewFeature_ {
   static const RECEIVE_WEB_RESOURCE_ERROR =
       const WebViewFeature_._internal("RECEIVE_WEB_RESOURCE_ERROR");
 
-  ///This feature covers [InAppWebViewController.setSafeBrowsingAllowlist].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.setSafeBrowsingAllowlist].
   static const SAFE_BROWSING_ALLOWLIST =
       const WebViewFeature_._internal("SAFE_BROWSING_ALLOWLIST");
 
-  ///This feature covers [InAppWebViewSettings.safeBrowsingEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.safeBrowsingEnabled].
   static const SAFE_BROWSING_ENABLE =
       const WebViewFeature_._internal("SAFE_BROWSING_ENABLE");
 
@@ -95,7 +96,7 @@ class WebViewFeature_ {
   static const SAFE_BROWSING_HIT =
       const WebViewFeature_._internal("SAFE_BROWSING_HIT");
 
-  ///This feature covers [InAppWebViewController.getSafeBrowsingPrivacyPolicyUrl].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.getSafeBrowsingPrivacyPolicyUrl].
   static const SAFE_BROWSING_PRIVACY_POLICY_URL =
       const WebViewFeature_._internal("SAFE_BROWSING_PRIVACY_POLICY_URL");
 
@@ -117,27 +118,27 @@ class WebViewFeature_ {
   static const SAFE_BROWSING_WHITELIST =
       const WebViewFeature_._internal("SAFE_BROWSING_WHITELIST");
 
-  ///This feature covers [ServiceWorkerController].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController].
   static const SERVICE_WORKER_BASIC_USAGE =
       const WebViewFeature_._internal("SERVICE_WORKER_BASIC_USAGE");
 
-  ///This feature covers [ServiceWorkerController.setBlockNetworkLoads] and [ServiceWorkerController.getBlockNetworkLoads].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setBlockNetworkLoads] and [ServiceWorkerController.getBlockNetworkLoads].
   static const SERVICE_WORKER_BLOCK_NETWORK_LOADS =
       const WebViewFeature_._internal("SERVICE_WORKER_BLOCK_NETWORK_LOADS");
 
-  ///This feature covers [ServiceWorkerController.setCacheMode] and [ServiceWorkerController.getCacheMode].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setCacheMode] and [ServiceWorkerController.getCacheMode].
   static const SERVICE_WORKER_CACHE_MODE =
       const WebViewFeature_._internal("SERVICE_WORKER_CACHE_MODE");
 
-  ///This feature covers [ServiceWorkerController.setAllowContentAccess] and [ServiceWorkerController.getAllowContentAccess].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setAllowContentAccess] and [ServiceWorkerController.getAllowContentAccess].
   static const SERVICE_WORKER_CONTENT_ACCESS =
       const WebViewFeature_._internal("SERVICE_WORKER_CONTENT_ACCESS");
 
-  ///This feature covers [ServiceWorkerController.setAllowFileAccess] and [ServiceWorkerController.getAllowFileAccess].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setAllowFileAccess] and [ServiceWorkerController.getAllowFileAccess].
   static const SERVICE_WORKER_FILE_ACCESS =
       const WebViewFeature_._internal("SERVICE_WORKER_FILE_ACCESS");
 
-  ///This feature covers [ServiceWorkerClient.shouldInterceptRequest].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerClient.shouldInterceptRequest].
   static const SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST =
       const WebViewFeature_._internal(
           "SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST");
@@ -146,7 +147,7 @@ class WebViewFeature_ {
   static const SHOULD_OVERRIDE_WITH_REDIRECTS =
       const WebViewFeature_._internal("SHOULD_OVERRIDE_WITH_REDIRECTS");
 
-  ///This feature covers [InAppWebViewController.startSafeBrowsing].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.startSafeBrowsing].
   static const START_SAFE_BROWSING =
       const WebViewFeature_._internal("START_SAFE_BROWSING");
 
@@ -162,7 +163,7 @@ class WebViewFeature_ {
   static const WEB_MESSAGE_CALLBACK_ON_MESSAGE =
       const WebViewFeature_._internal("WEB_MESSAGE_CALLBACK_ON_MESSAGE");
 
-  ///This feature covers [WebMessageListener].
+  ///Feature for [isFeatureSupported]. This feature covers [WebMessageListener].
   static const WEB_MESSAGE_LISTENER =
       const WebViewFeature_._internal("WEB_MESSAGE_LISTENER");
 
@@ -198,45 +199,90 @@ class WebViewFeature_ {
   static const WEB_VIEW_RENDERER_TERMINATE =
       const WebViewFeature_._internal("WEB_VIEW_RENDERER_TERMINATE");
 
-  ///This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
+  ///Feature for [isFeatureSupported]. This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
   static const DOCUMENT_START_SCRIPT =
       const WebViewFeature_._internal("DOCUMENT_START_SCRIPT");
 
-  ///This feature covers [InAppWebViewSettings.willSuppressErrorPage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.willSuppressErrorPage].
   static const SUPPRESS_ERROR_PAGE =
       const WebViewFeature_._internal("SUPPRESS_ERROR_PAGE");
 
-  ///This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
   static const ALGORITHMIC_DARKENING =
       const WebViewFeature_._internal("ALGORITHMIC_DARKENING");
 
-  ///This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
   static const ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY =
       const WebViewFeature_._internal(
           "ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY");
 
-  ///This feature covers [InAppWebViewController.getVariationsHeader].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.getVariationsHeader].
   static const GET_VARIATIONS_HEADER =
       const WebViewFeature_._internal("GET_VARIATIONS_HEADER");
 
-  ///This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
+  ///Feature for [isFeatureSupported]. This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
   static const GET_COOKIE_INFO =
       const WebViewFeature_._internal("GET_COOKIE_INFO");
 
-  ///This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
+  ///Feature for [isFeatureSupported]. This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
   static const REQUESTED_WITH_HEADER_ALLOW_LIST =
       const WebViewFeature_._internal("REQUESTED_WITH_HEADER_ALLOW_LIST");
 
+  ///Feature for [isFeatureSupported]. This feature covers [WebMessagePort.postMessage] with `ArrayBuffer` type,
+  ///[InAppWebViewController.postWebMessage] with `ArrayBuffer` type, and [JavaScriptReplyProxy.postMessage] with `ArrayBuffer` type.
+  static const WEB_MESSAGE_ARRAY_BUFFER =
+      const WebViewFeature_._internal("WEB_MESSAGE_ARRAY_BUFFER");
+
+  ///Feature for [isStartupFeatureSupported]. This feature covers [ProcessGlobalConfigSettings.dataDirectorySuffix].
+  static const STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX =
+      const WebViewFeature_._internal(
+          "STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX");
+
+  ///Feature for [isStartupFeatureSupported]. This feature covers [ProcessGlobalConfigSettings.directoryBasePaths].
+  static const STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS =
+      const WebViewFeature_._internal(
+          "STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS");
+
   ///Return whether a feature is supported at run-time. On devices running Android version `Build.VERSION_CODES.LOLLIPOP` and higher,
   ///this will check whether a feature is supported, depending on the combination of the desired feature, the Android version of device,
   ///and the WebView APK on the device. If running on a device with a lower API level, this will always return `false`.
   ///
+  ///**Note**: This method is different from [isStartupFeatureSupported] and this
+  ///method only accepts certain features.
+  ///Please verify that the correct feature checking method is used for a particular feature.
+  ///
+  ///**Note**: If this method returns `false`, it is not safe to invoke the methods
+  ///requiring the desired feature.
+  ///Furthermore, if this method returns `false` for a particular feature, any callback guarded by that feature will not be invoked.
+  ///
   ///**Official Android API**: https://developer.android.com/reference/androidx/webkit/WebViewFeature#isFeatureSupported(java.lang.String)
   static Future<bool> isFeatureSupported(WebViewFeature_ feature) async {
     Map<String, dynamic> args = <String, dynamic>{};
     args.putIfAbsent("feature", () => feature.toNativeValue());
     return await _channel.invokeMethod('isFeatureSupported', args);
   }
+
+  ///Return whether a startup feature is supported at run-time.
+  ///On devices running Android version `Build.VERSION_CODES.LOLLIPOP` and higher,
+  ///this will check whether a startup feature is supported,
+  ///depending on the combination of the desired feature,
+  ///the Android version of device, and the WebView APK on the device.
+  ///If running on a device with a lower API level, this will always return `false`.
+  ///
+  ///**Note**: This method is different from [isFeatureSupported] and this method only accepts startup features.
+  ///Please verify that the correct feature checking method is used for a particular feature.
+  ///
+  ///**Note**: If this method returns `false`, it is not safe to invoke the methods requiring the desired feature.
+  ///Furthermore, if this method returns `false` for a particular feature,
+  ///any callback guarded by that feature will not be invoked.
+  ///
+  ///**Official Android API**: https://developer.android.com/reference/androidx/webkit/WebViewFeature#isFeatureSupported(java.lang.String)
+  static Future<bool> isStartupFeatureSupported(
+      WebViewFeature_ startupFeature) async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    args.putIfAbsent("startupFeature", () => startupFeature.toNativeValue());
+    return await _channel.invokeMethod('isStartupFeatureSupported', args);
+  }
 }
 
 ///Class that represents an Android-specific utility class for checking which WebView Support Library features are supported on the device.
@@ -430,23 +476,23 @@ class AndroidWebViewFeature_ {
   static const WEB_VIEW_RENDERER_TERMINATE =
       const AndroidWebViewFeature_._internal("WEB_VIEW_RENDERER_TERMINATE");
 
-  ///This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
+  ///Feature for [isFeatureSupported]. This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
   static const DOCUMENT_START_SCRIPT =
       const AndroidWebViewFeature_._internal("DOCUMENT_START_SCRIPT");
 
-  ///This feature covers [InAppWebViewSettings.willSuppressErrorPage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.willSuppressErrorPage].
   static const SUPPRESS_ERROR_PAGE =
       const AndroidWebViewFeature_._internal("SUPPRESS_ERROR_PAGE");
 
-  ///This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
   static const ALGORITHMIC_DARKENING =
       const AndroidWebViewFeature_._internal("ALGORITHMIC_DARKENING");
 
-  ///This feature covers [InAppWebViewSettings.requestedWithHeaderMode].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.requestedWithHeaderMode].
   static const REQUESTED_WITH_HEADER_CONTROL =
       const AndroidWebViewFeature_._internal("REQUESTED_WITH_HEADER_CONTROL");
 
-  ///This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
   static const ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY =
       const AndroidWebViewFeature_._internal(
           "ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY");

lib/src/android/webview_feature.g.dart

@@ -19,40 +19,40 @@ class WebViewFeature {
           String value, Function nativeValue) =>
       WebViewFeature._internal(value, nativeValue());
 
-  ///This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
   static const ALGORITHMIC_DARKENING = WebViewFeature._internal(
       'ALGORITHMIC_DARKENING', 'ALGORITHMIC_DARKENING');
 
-  ///This feature covers [InAppWebViewController.createWebMessageChannel].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.createWebMessageChannel].
   static const CREATE_WEB_MESSAGE_CHANNEL = WebViewFeature._internal(
       'CREATE_WEB_MESSAGE_CHANNEL', 'CREATE_WEB_MESSAGE_CHANNEL');
 
-  ///This feature covers [InAppWebViewSettings.disabledActionModeMenuItems].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.disabledActionModeMenuItems].
   static const DISABLED_ACTION_MODE_MENU_ITEMS = WebViewFeature._internal(
       'DISABLED_ACTION_MODE_MENU_ITEMS', 'DISABLED_ACTION_MODE_MENU_ITEMS');
 
-  ///This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
+  ///Feature for [isFeatureSupported]. This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
   static const DOCUMENT_START_SCRIPT = WebViewFeature._internal(
       'DOCUMENT_START_SCRIPT', 'DOCUMENT_START_SCRIPT');
 
-  ///This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
   static const ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY =
       WebViewFeature._internal('ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY',
           'ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY');
 
-  ///This feature covers [InAppWebViewSettings.forceDark].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.forceDark].
   static const FORCE_DARK =
       WebViewFeature._internal('FORCE_DARK', 'FORCE_DARK');
 
-  ///This feature covers [InAppWebViewSettings.forceDarkStrategy].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.forceDarkStrategy].
   static const FORCE_DARK_STRATEGY =
       WebViewFeature._internal('FORCE_DARK_STRATEGY', 'FORCE_DARK_STRATEGY');
 
-  ///This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
+  ///Feature for [isFeatureSupported]. This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
   static const GET_COOKIE_INFO =
       WebViewFeature._internal('GET_COOKIE_INFO', 'GET_COOKIE_INFO');
 
-  ///This feature covers [InAppWebViewController.getVariationsHeader].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.getVariationsHeader].
   static const GET_VARIATIONS_HEADER = WebViewFeature._internal(
       'GET_VARIATIONS_HEADER', 'GET_VARIATIONS_HEADER');
 
@@ -72,19 +72,19 @@ class WebViewFeature {
   static const MULTI_PROCESS =
       WebViewFeature._internal('MULTI_PROCESS', 'MULTI_PROCESS');
 
-  ///This feature covers [InAppWebViewSettings.offscreenPreRaster].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.offscreenPreRaster].
   static const OFF_SCREEN_PRERASTER =
       WebViewFeature._internal('OFF_SCREEN_PRERASTER', 'OFF_SCREEN_PRERASTER');
 
-  ///This feature covers [InAppWebViewController.postWebMessage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.postWebMessage].
   static const POST_WEB_MESSAGE =
       WebViewFeature._internal('POST_WEB_MESSAGE', 'POST_WEB_MESSAGE');
 
-  ///This feature covers [ProxyController.setProxyOverride] and [ProxyController.clearProxyOverride].
+  ///Feature for [isFeatureSupported]. This feature covers [ProxyController.setProxyOverride] and [ProxyController.clearProxyOverride].
   static const PROXY_OVERRIDE =
       WebViewFeature._internal('PROXY_OVERRIDE', 'PROXY_OVERRIDE');
 
-  ///This feature covers [ProxySettings.reverseBypassEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [ProxySettings.reverseBypassEnabled].
   static const PROXY_OVERRIDE_REVERSE_BYPASS = WebViewFeature._internal(
       'PROXY_OVERRIDE_REVERSE_BYPASS', 'PROXY_OVERRIDE_REVERSE_BYPASS');
 
@@ -96,15 +96,15 @@ class WebViewFeature {
   static const RECEIVE_WEB_RESOURCE_ERROR = WebViewFeature._internal(
       'RECEIVE_WEB_RESOURCE_ERROR', 'RECEIVE_WEB_RESOURCE_ERROR');
 
-  ///This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
+  ///Feature for [isFeatureSupported]. This feature covers cookie attributes of [CookieManager.getCookie] and [CookieManager.getCookies] methods.
   static const REQUESTED_WITH_HEADER_ALLOW_LIST = WebViewFeature._internal(
       'REQUESTED_WITH_HEADER_ALLOW_LIST', 'REQUESTED_WITH_HEADER_ALLOW_LIST');
 
-  ///This feature covers [InAppWebViewController.setSafeBrowsingAllowlist].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.setSafeBrowsingAllowlist].
   static const SAFE_BROWSING_ALLOWLIST = WebViewFeature._internal(
       'SAFE_BROWSING_ALLOWLIST', 'SAFE_BROWSING_ALLOWLIST');
 
-  ///This feature covers [InAppWebViewSettings.safeBrowsingEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.safeBrowsingEnabled].
   static const SAFE_BROWSING_ENABLE =
       WebViewFeature._internal('SAFE_BROWSING_ENABLE', 'SAFE_BROWSING_ENABLE');
 
@@ -112,7 +112,7 @@ class WebViewFeature {
   static const SAFE_BROWSING_HIT =
       WebViewFeature._internal('SAFE_BROWSING_HIT', 'SAFE_BROWSING_HIT');
 
-  ///This feature covers [InAppWebViewController.getSafeBrowsingPrivacyPolicyUrl].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.getSafeBrowsingPrivacyPolicyUrl].
   static const SAFE_BROWSING_PRIVACY_POLICY_URL = WebViewFeature._internal(
       'SAFE_BROWSING_PRIVACY_POLICY_URL', 'SAFE_BROWSING_PRIVACY_POLICY_URL');
 
@@ -134,28 +134,28 @@ class WebViewFeature {
   static const SAFE_BROWSING_WHITELIST = WebViewFeature._internal(
       'SAFE_BROWSING_WHITELIST', 'SAFE_BROWSING_WHITELIST');
 
-  ///This feature covers [ServiceWorkerController].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController].
   static const SERVICE_WORKER_BASIC_USAGE = WebViewFeature._internal(
       'SERVICE_WORKER_BASIC_USAGE', 'SERVICE_WORKER_BASIC_USAGE');
 
-  ///This feature covers [ServiceWorkerController.setBlockNetworkLoads] and [ServiceWorkerController.getBlockNetworkLoads].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setBlockNetworkLoads] and [ServiceWorkerController.getBlockNetworkLoads].
   static const SERVICE_WORKER_BLOCK_NETWORK_LOADS = WebViewFeature._internal(
       'SERVICE_WORKER_BLOCK_NETWORK_LOADS',
       'SERVICE_WORKER_BLOCK_NETWORK_LOADS');
 
-  ///This feature covers [ServiceWorkerController.setCacheMode] and [ServiceWorkerController.getCacheMode].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setCacheMode] and [ServiceWorkerController.getCacheMode].
   static const SERVICE_WORKER_CACHE_MODE = WebViewFeature._internal(
       'SERVICE_WORKER_CACHE_MODE', 'SERVICE_WORKER_CACHE_MODE');
 
-  ///This feature covers [ServiceWorkerController.setAllowContentAccess] and [ServiceWorkerController.getAllowContentAccess].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setAllowContentAccess] and [ServiceWorkerController.getAllowContentAccess].
   static const SERVICE_WORKER_CONTENT_ACCESS = WebViewFeature._internal(
       'SERVICE_WORKER_CONTENT_ACCESS', 'SERVICE_WORKER_CONTENT_ACCESS');
 
-  ///This feature covers [ServiceWorkerController.setAllowFileAccess] and [ServiceWorkerController.getAllowFileAccess].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerController.setAllowFileAccess] and [ServiceWorkerController.getAllowFileAccess].
   static const SERVICE_WORKER_FILE_ACCESS = WebViewFeature._internal(
       'SERVICE_WORKER_FILE_ACCESS', 'SERVICE_WORKER_FILE_ACCESS');
 
-  ///This feature covers [ServiceWorkerClient.shouldInterceptRequest].
+  ///Feature for [isFeatureSupported]. This feature covers [ServiceWorkerClient.shouldInterceptRequest].
   static const SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST =
       WebViewFeature._internal('SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST',
           'SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST');
@@ -164,11 +164,21 @@ class WebViewFeature {
   static const SHOULD_OVERRIDE_WITH_REDIRECTS = WebViewFeature._internal(
       'SHOULD_OVERRIDE_WITH_REDIRECTS', 'SHOULD_OVERRIDE_WITH_REDIRECTS');
 
-  ///This feature covers [InAppWebViewController.startSafeBrowsing].
+  ///Feature for [isStartupFeatureSupported]. This feature covers [ProcessGlobalConfigSettings.dataDirectorySuffix].
+  static const STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX =
+      WebViewFeature._internal('STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX',
+          'STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX');
+
+  ///Feature for [isStartupFeatureSupported]. This feature covers [ProcessGlobalConfigSettings.directoryBasePaths].
+  static const STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS =
+      WebViewFeature._internal('STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS',
+          'STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS');
+
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewController.startSafeBrowsing].
   static const START_SAFE_BROWSING =
       WebViewFeature._internal('START_SAFE_BROWSING', 'START_SAFE_BROWSING');
 
-  ///This feature covers [InAppWebViewSettings.willSuppressErrorPage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.willSuppressErrorPage].
   static const SUPPRESS_ERROR_PAGE =
       WebViewFeature._internal('SUPPRESS_ERROR_PAGE', 'SUPPRESS_ERROR_PAGE');
 
@@ -180,11 +190,16 @@ class WebViewFeature {
   static const VISUAL_STATE_CALLBACK = WebViewFeature._internal(
       'VISUAL_STATE_CALLBACK', 'VISUAL_STATE_CALLBACK');
 
+  ///Feature for [isFeatureSupported]. This feature covers [WebMessagePort.postMessage] with `ArrayBuffer` type,
+  ///[InAppWebViewController.postWebMessage] with `ArrayBuffer` type, and [JavaScriptReplyProxy.postMessage] with `ArrayBuffer` type.
+  static const WEB_MESSAGE_ARRAY_BUFFER = WebViewFeature._internal(
+      'WEB_MESSAGE_ARRAY_BUFFER', 'WEB_MESSAGE_ARRAY_BUFFER');
+
   ///
   static const WEB_MESSAGE_CALLBACK_ON_MESSAGE = WebViewFeature._internal(
       'WEB_MESSAGE_CALLBACK_ON_MESSAGE', 'WEB_MESSAGE_CALLBACK_ON_MESSAGE');
 
-  ///This feature covers [WebMessageListener].
+  ///Feature for [isFeatureSupported]. This feature covers [WebMessageListener].
   static const WEB_MESSAGE_LISTENER =
       WebViewFeature._internal('WEB_MESSAGE_LISTENER', 'WEB_MESSAGE_LISTENER');
 
@@ -262,10 +277,13 @@ class WebViewFeature {
     WebViewFeature.SERVICE_WORKER_FILE_ACCESS,
     WebViewFeature.SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST,
     WebViewFeature.SHOULD_OVERRIDE_WITH_REDIRECTS,
+    WebViewFeature.STARTUP_FEATURE_SET_DATA_DIRECTORY_SUFFIX,
+    WebViewFeature.STARTUP_FEATURE_SET_DIRECTORY_BASE_PATHS,
     WebViewFeature.START_SAFE_BROWSING,
     WebViewFeature.SUPPRESS_ERROR_PAGE,
     WebViewFeature.TRACING_CONTROLLER_BASIC_USAGE,
     WebViewFeature.VISUAL_STATE_CALLBACK,
+    WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER,
     WebViewFeature.WEB_MESSAGE_CALLBACK_ON_MESSAGE,
     WebViewFeature.WEB_MESSAGE_LISTENER,
     WebViewFeature.WEB_MESSAGE_PORT_CLOSE,
@@ -308,6 +326,14 @@ class WebViewFeature {
   ///this will check whether a feature is supported, depending on the combination of the desired feature, the Android version of device,
   ///and the WebView APK on the device. If running on a device with a lower API level, this will always return `false`.
   ///
+  ///**Note**: This method is different from [isStartupFeatureSupported] and this
+  ///method only accepts certain features.
+  ///Please verify that the correct feature checking method is used for a particular feature.
+  ///
+  ///**Note**: If this method returns `false`, it is not safe to invoke the methods
+  ///requiring the desired feature.
+  ///Furthermore, if this method returns `false` for a particular feature, any callback guarded by that feature will not be invoked.
+  ///
   ///**Official Android API**: https://developer.android.com/reference/androidx/webkit/WebViewFeature#isFeatureSupported(java.lang.String)
   static Future<bool> isFeatureSupported(WebViewFeature feature) async {
     Map<String, dynamic> args = <String, dynamic>{};
@@ -315,6 +341,28 @@ class WebViewFeature {
     return await _channel.invokeMethod('isFeatureSupported', args);
   }
 
+  ///Return whether a startup feature is supported at run-time.
+  ///On devices running Android version `Build.VERSION_CODES.LOLLIPOP` and higher,
+  ///this will check whether a startup feature is supported,
+  ///depending on the combination of the desired feature,
+  ///the Android version of device, and the WebView APK on the device.
+  ///If running on a device with a lower API level, this will always return `false`.
+  ///
+  ///**Note**: This method is different from [isFeatureSupported] and this method only accepts startup features.
+  ///Please verify that the correct feature checking method is used for a particular feature.
+  ///
+  ///**Note**: If this method returns `false`, it is not safe to invoke the methods requiring the desired feature.
+  ///Furthermore, if this method returns `false` for a particular feature,
+  ///any callback guarded by that feature will not be invoked.
+  ///
+  ///**Official Android API**: https://developer.android.com/reference/androidx/webkit/WebViewFeature#isFeatureSupported(java.lang.String)
+  static Future<bool> isStartupFeatureSupported(
+      WebViewFeature startupFeature) async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    args.putIfAbsent("startupFeature", () => startupFeature.toNativeValue());
+    return await _channel.invokeMethod('isStartupFeatureSupported', args);
+  }
+
   ///Gets [String] value.
   String toValue() => _value;
 
@@ -345,7 +393,7 @@ class AndroidWebViewFeature {
           String value, Function nativeValue) =>
       AndroidWebViewFeature._internal(value, nativeValue());
 
-  ///This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.algorithmicDarkeningAllowed].
   static const ALGORITHMIC_DARKENING = AndroidWebViewFeature._internal(
       'ALGORITHMIC_DARKENING', 'ALGORITHMIC_DARKENING');
 
@@ -358,11 +406,11 @@ class AndroidWebViewFeature {
       AndroidWebViewFeature._internal(
           'DISABLED_ACTION_MODE_MENU_ITEMS', 'DISABLED_ACTION_MODE_MENU_ITEMS');
 
-  ///This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
+  ///Feature for [isFeatureSupported]. This feature covers [UserScriptInjectionTime.AT_DOCUMENT_START].
   static const DOCUMENT_START_SCRIPT = AndroidWebViewFeature._internal(
       'DOCUMENT_START_SCRIPT', 'DOCUMENT_START_SCRIPT');
 
-  ///This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.enterpriseAuthenticationAppLinkPolicyEnabled].
   static const ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY =
       AndroidWebViewFeature._internal(
           'ENTERPRISE_AUTHENTICATION_APP_LINK_POLICY',
@@ -412,7 +460,7 @@ class AndroidWebViewFeature {
   static const RECEIVE_WEB_RESOURCE_ERROR = AndroidWebViewFeature._internal(
       'RECEIVE_WEB_RESOURCE_ERROR', 'RECEIVE_WEB_RESOURCE_ERROR');
 
-  ///This feature covers [InAppWebViewSettings.requestedWithHeaderMode].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.requestedWithHeaderMode].
   static const REQUESTED_WITH_HEADER_CONTROL = AndroidWebViewFeature._internal(
       'REQUESTED_WITH_HEADER_CONTROL', 'REQUESTED_WITH_HEADER_CONTROL');
 
@@ -486,7 +534,7 @@ class AndroidWebViewFeature {
   static const START_SAFE_BROWSING = AndroidWebViewFeature._internal(
       'START_SAFE_BROWSING', 'START_SAFE_BROWSING');
 
-  ///This feature covers [InAppWebViewSettings.willSuppressErrorPage].
+  ///Feature for [isFeatureSupported]. This feature covers [InAppWebViewSettings.willSuppressErrorPage].
   static const SUPPRESS_ERROR_PAGE = AndroidWebViewFeature._internal(
       'SUPPRESS_ERROR_PAGE', 'SUPPRESS_ERROR_PAGE');
 

lib/src/in_app_webview/in_app_webview_controller.dart

@@ -30,6 +30,7 @@ import 'in_app_webview_keep_alive.dart';
 
 import '../print_job/main.dart';
 import '../find_interaction/main.dart';
+import '../android/process_global_config.dart';
 
 ///List of forbidden names for JavaScript handlers.
 // ignore: non_constant_identifier_names
@@ -3870,6 +3871,24 @@ class InAppWebViewController extends ChannelController {
         false;
   }
 
+  ///Indicate that the current process does not intend to use WebView,
+  ///and that an exception should be thrown if a WebView is created or any other
+  ///methods in the `android.webkit` package are used.
+  ///
+  ///Applications with multiple processes may wish to call this in processes that
+  ///are not intended to use WebView to avoid accidentally incurring the memory usage
+  ///of initializing WebView in long-lived processes that have no need for it,
+  ///and to prevent potential data directory conflicts (see [ProcessGlobalConfigSettings.dataDirectorySuffix]).
+  ///
+  ///**NOTE for Android**: available only on Android 28+.
+  ///
+  ///**Supported Platforms/Implementations**:
+  ///- Android native WebView ([Official API - WebView.disableWebView](https://developer.android.com/reference/android/webkit/WebView.html#disableWebView()))
+  static Future<void> disableWebView() async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    await _staticChannel.invokeMethod('disableWebView', args);
+  }
+
   ///Returns a Boolean value that indicates whether WebKit natively supports resources with the specified URL scheme.
   ///
   ///[urlScheme] represents the URL scheme associated with the resource.

lib/src/types/on_post_message_callback.dart

@@ -2,5 +2,5 @@ import '../web_message/main.dart';
 import '../web_uri.dart';
 
 ///The listener for handling [WebMessageListener] events sent by a `postMessage()` on the injected JavaScript object.
-typedef void OnPostMessageCallback(String? message, WebUri? sourceOrigin,
+typedef void OnPostMessageCallback(WebMessage? message, WebUri? sourceOrigin,
     bool isMainFrame, JavaScriptReplyProxy replyProxy);

lib/src/types/web_message_callback.dart

@@ -2,4 +2,4 @@ import '../web_message/main.dart';
 
 ///The listener for handling [WebMessagePort] events.
 ///The message callback methods are called on the main thread.
-typedef void WebMessageCallback(String? message);
+typedef void WebMessageCallback(WebMessage? message);

lib/src/web_message/main.dart

@@ -1,4 +1,4 @@
-export 'web_message.dart' show WebMessage;
+export 'web_message.dart' show WebMessage, WebMessageType;
 export 'web_message_port.dart' show WebMessagePort;
 export 'web_message_channel.dart' show WebMessageChannel;
 export 'web_message_listener.dart';

lib/src/web_message/web_message.dart

@@ -1,18 +1,47 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter_inappwebview_internal_annotations/flutter_inappwebview_internal_annotations.dart';
 
+import '../android/webview_feature.dart';
 import 'web_message_port.dart';
 
 part 'web_message.g.dart';
 
 ///The Dart representation of the HTML5 PostMessage event.
 ///See https://html.spec.whatwg.org/multipage/comms.html#the-messageevent-interfaces for definition of a MessageEvent in HTML5.
-@ExchangeableObject()
+@ExchangeableObject(fromMapForceAllInline: true)
 class WebMessage_ {
   ///The data of the message.
-  String? data;
+  dynamic data;
+
+  ///The payload type of the message.
+  WebMessageType_ type;
 
   ///The ports that are sent with the message.
   List<WebMessagePort>? ports;
 
-  WebMessage_({this.data, this.ports});
+  @ExchangeableObjectConstructor()
+  WebMessage_({this.data, this.type = WebMessageType_.STRING, this.ports}) {
+    assert(((this.data == null || this.data is String) &&
+            this.type == WebMessageType_.STRING) ||
+        (this.data != null &&
+            this.data is Uint8List &&
+            this.type == WebMessageType_.ARRAY_BUFFER));
+  }
+}
+
+///The type corresponding to the [WebMessage].
+@ExchangeableEnum()
+class WebMessageType_ {
+  // ignore: unused_field
+  final int _value;
+
+  const WebMessageType_._internal(this._value);
+
+  ///Indicates the payload of WebMessageCompat is String.
+  static const STRING = const WebMessageType_._internal(0);
+
+  ///Indicates the payload of WebMessageCompat is JavaScript ArrayBuffer.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER] feature is supported.
+  static const ARRAY_BUFFER = const WebMessageType_._internal(1);
 }

lib/src/web_message/web_message.g.dart

@@ -2,6 +2,84 @@
 
 part of 'web_message.dart';
 
+// **************************************************************************
+// ExchangeableEnumGenerator
+// **************************************************************************
+
+///The type corresponding to the [WebMessage].
+class WebMessageType {
+  final int _value;
+  final int _nativeValue;
+  const WebMessageType._internal(this._value, this._nativeValue);
+// ignore: unused_element
+  factory WebMessageType._internalMultiPlatform(
+          int value, Function nativeValue) =>
+      WebMessageType._internal(value, nativeValue());
+
+  ///Indicates the payload of WebMessageCompat is JavaScript ArrayBuffer.
+  ///
+  ///**NOTE**: available only if [WebViewFeature.WEB_MESSAGE_ARRAY_BUFFER] feature is supported.
+  static const ARRAY_BUFFER = WebMessageType._internal(1, 1);
+
+  ///Indicates the payload of WebMessageCompat is String.
+  static const STRING = WebMessageType._internal(0, 0);
+
+  ///Set of all values of [WebMessageType].
+  static final Set<WebMessageType> values = [
+    WebMessageType.ARRAY_BUFFER,
+    WebMessageType.STRING,
+  ].toSet();
+
+  ///Gets a possible [WebMessageType] instance from [int] value.
+  static WebMessageType? fromValue(int? value) {
+    if (value != null) {
+      try {
+        return WebMessageType.values
+            .firstWhere((element) => element.toValue() == value);
+      } catch (e) {
+        return null;
+      }
+    }
+    return null;
+  }
+
+  ///Gets a possible [WebMessageType] instance from a native value.
+  static WebMessageType? fromNativeValue(int? value) {
+    if (value != null) {
+      try {
+        return WebMessageType.values
+            .firstWhere((element) => element.toNativeValue() == value);
+      } catch (e) {
+        return null;
+      }
+    }
+    return null;
+  }
+
+  ///Gets [int] value.
+  int toValue() => _value;
+
+  ///Gets [int] native value.
+  int toNativeValue() => _nativeValue;
+
+  @override
+  int get hashCode => _value.hashCode;
+
+  @override
+  bool operator ==(value) => value == _value;
+
+  @override
+  String toString() {
+    switch (_value) {
+      case 1:
+        return 'ARRAY_BUFFER';
+      case 0:
+        return 'STRING';
+    }
+    return _value.toString();
+  }
+}
+
 // **************************************************************************
 // ExchangeableObjectGenerator
 // **************************************************************************
@@ -10,11 +88,20 @@ part of 'web_message.dart';
 ///See https://html.spec.whatwg.org/multipage/comms.html#the-messageevent-interfaces for definition of a MessageEvent in HTML5.
 class WebMessage {
   ///The data of the message.
-  String? data;
+  dynamic data;
 
   ///The ports that are sent with the message.
   List<WebMessagePort>? ports;
-  WebMessage({this.data, this.ports});
+
+  ///The payload type of the message.
+  WebMessageType type;
+  WebMessage({this.data, this.type = WebMessageType.STRING, this.ports}) {
+    assert(((this.data == null || this.data is String) &&
+            this.type == WebMessageType.STRING) ||
+        (this.data != null &&
+            this.data is Uint8List &&
+            this.type == WebMessageType.ARRAY_BUFFER));
+  }
 
   ///Gets a possible [WebMessage] instance from a [Map] value.
   static WebMessage? fromMap(Map<String, dynamic>? map) {
@@ -26,6 +113,7 @@ class WebMessage {
       ports: map['ports'] != null
           ? List<WebMessagePort>.from(map['ports'].map((e) => e))
           : null,
+      type: WebMessageType.fromNativeValue(map['type'])!,
     );
     return instance;
   }
@@ -35,6 +123,7 @@ class WebMessage {
     return {
       "data": data,
       "ports": ports?.map((e) => e.toMap()).toList(),
+      "type": type.toNativeValue(),
     };
   }
 
@@ -45,6 +134,6 @@ class WebMessage {
 
   @override
   String toString() {
-    return 'WebMessage{data: $data, ports: $ports}';
+    return 'WebMessage{data: $data, ports: $ports, type: $type}';
   }
 }

lib/src/web_message/web_message_channel.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/services.dart';
 import 'package:flutter_inappwebview/src/util.dart';
 import 'web_message_port.dart';
+import 'web_message.dart';
 
 ///The representation of the [HTML5 message channels](https://html.spec.whatwg.org/multipage/web-messaging.html#message-channels).
 ///
@@ -45,7 +46,10 @@ class WebMessageChannel extends ChannelController {
         int index = call.arguments["index"];
         var port = index == 0 ? this.port1 : this.port2;
         if (port.onMessage != null) {
-          String? message = call.arguments["message"];
+          WebMessage? message = call.arguments["message"] != null
+              ? WebMessage.fromMap(
+                  call.arguments["message"].cast<String, dynamic>())
+              : null;
           port.onMessage!(message);
         }
         break;

lib/src/web_message/web_message_listener.dart

@@ -3,6 +3,7 @@ import '../in_app_webview/in_app_webview_controller.dart';
 import '../types/main.dart';
 import '../util.dart';
 import '../web_uri.dart';
+import 'web_message.dart';
 
 ///This listener receives messages sent on the JavaScript object which was injected by [InAppWebViewController.addWebMessageListener].
 ///
@@ -56,7 +57,10 @@ class WebMessageListener extends ChannelController {
           _replyProxy = new JavaScriptReplyProxy(this);
         }
         if (onPostMessage != null) {
-          String? message = call.arguments["message"];
+          WebMessage? message = call.arguments["message"] != null
+              ? WebMessage.fromMap(
+                  call.arguments["message"].cast<String, dynamic>())
+              : null;
           WebUri? sourceOrigin = call.arguments["sourceOrigin"] != null
               ? WebUri(call.arguments["sourceOrigin"])
               : null;
@@ -107,10 +111,12 @@ class JavaScriptReplyProxy {
 
   ///Post a [message] to the injected JavaScript object which sent this [JavaScriptReplyProxy].
   ///
+  ///If [message] is of type [WebMessageType.ARRAY_BUFFER], be aware that large byte buffers can lead to out-of-memory crashes on low-end devices.
+  ///
   ///**Official Android API**: https://developer.android.com/reference/androidx/webkit/JavaScriptReplyProxy#postMessage(java.lang.String)
-  Future<void> postMessage(String message) async {
+  Future<void> postMessage(WebMessage message) async {
     Map<String, dynamic> args = <String, dynamic>{};
-    args.putIfAbsent('message', () => message);
+    args.putIfAbsent('message', () => message.toMap());
     await _webMessageListener.channel?.invokeMethod('postMessage', args);
   }
 

macos/Classes/InAppWebView/InAppWebView.swift

@@ -2201,14 +2201,22 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
             let body = message.body as! [String: Any?]
             let webMessageChannelId = body["webMessageChannelId"] as! String
             let index = body["index"] as! Int64
-            let webMessage = body["message"] as? String
+            var webMessage: WebMessage? = nil
+            if let webMessageMap = body["message"] as? [String : Any?] {
+                webMessage = WebMessage.fromMap(map: webMessageMap)
+            }
+            
             if let webMessageChannel = webMessageChannels[webMessageChannelId] {
                 webMessageChannel.channelDelegate?.onMessage(index: index, message: webMessage)
             }
         } else if message.name == "onWebMessageListenerPostMessageReceived" {
             let body = message.body as! [String: Any?]
             let jsObjectName = body["jsObjectName"] as! String
-            let messageData = body["message"] as? String
+            var webMessage: WebMessage? = nil
+            if let webMessageMap = body["message"] as? [String : Any?] {
+                webMessage = WebMessage.fromMap(map: webMessageMap)
+            }
+            
             if let webMessageListener = webMessageListeners.first(where: ({($0.jsObjectName == jsObjectName)})) {
                 let isMainFrame = message.frameInfo.isMainFrame
                 
@@ -2225,7 +2233,7 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
                 if !scheme.isEmpty, !host.isEmpty {
                     sourceOrigin = URL(string: "\(scheme)://\(host)\(port != 0 ? ":" + String(port) : "")")
                 }
-                webMessageListener.channelDelegate?.onPostMessage(message: messageData, sourceOrigin: sourceOrigin, isMainFrame: isMainFrame)
+                webMessageListener.channelDelegate?.onPostMessage(message: webMessage, sourceOrigin: sourceOrigin, isMainFrame: isMainFrame)
             }
         }
     }
@@ -2514,11 +2522,11 @@ if(window.\(JAVASCRIPT_BRIDGE_NAME)[\(_callHandlerID)] != null) {
             }
             portsString = "[" + portArrayString.joined(separator: ", ") + "]"
         }
-        let data = message.data?.replacingOccurrences(of: "\'", with: "\\'") ?? "null"
+        
         let url = URL(string: targetOrigin)?.absoluteString ?? "*"
         let source = """
         (function() {
-            window.postMessage('\(data)', '\(url)', \(portsString));
+            window.postMessage(\(message.jsData), '\(url)', \(portsString));
         })();
         """
         evaluateJavascript(source: source, completionHandler: completionHandler)

macos/Classes/InAppWebView/WebMessage/WebMessageChannel.swift

@@ -26,8 +26,8 @@ public class WebMessageChannel : FlutterMethodCallDelegate {
             self.channelDelegate = WebMessageChannelChannelDelegate(webMessageChannel: self, channel: channel)
         }
         self.ports = [
-            WebMessagePort(name: "port1", webMessageChannel: self),
+            WebMessagePort(name: "port1", index: 0, webMessageChannelId: self.id, webMessageChannel: self),
-            WebMessagePort(name: "port2", webMessageChannel: self)
+            WebMessagePort(name: "port2", index: 1, webMessageChannelId: self.id, webMessageChannel: self)
         ]
     }
     

macos/Classes/InAppWebView/WebMessage/WebMessageChannelChannelDelegate.swift

@@ -40,22 +40,20 @@ public class WebMessageChannelChannelDelegate : ChannelDelegate {
             if let webView = webMessageChannel?.webView, let ports = webMessageChannel?.ports, ports.count > 0 {
                 let index = arguments!["index"] as! Int
                 let port = ports[index]
-                let message = arguments!["message"] as! [String: Any?]
+                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 
-                var webMessagePorts: [WebMessagePort] = []
+                var ports: [WebMessagePort] = []
-                let portsMap = message["ports"] as? [[String: Any?]]
+                if let notConnectedPorts = message.ports {
-                if let portsMap = portsMap {
+                    for notConnectedPort in notConnectedPorts {
-                    for portMap in portsMap {
+                        if let webMessageChannel = webView.webMessageChannels[notConnectedPort.webMessageChannelId] {
-                        let webMessageChannelId = portMap["webMessageChannelId"] as! String
+                            ports.append(webMessageChannel.ports[Int(notConnectedPort.index)])
-                        let index = portMap["index"] as! Int
-                        if let webMessageChannel = webView.webMessageChannels[webMessageChannelId] {
-                            webMessagePorts.append(webMessageChannel.ports[index])
                         }
                     }
                 }
-                let webMessage = WebMessage(data: message["data"] as? String, ports: webMessagePorts)
+                message.ports = ports
+                
                 do {
-                    try port.postMessage(message: webMessage) { (_) in
+                    try port.postMessage(message: message) { (_) in
                         result(true)
                     }
                 } catch let error as NSError {
@@ -86,10 +84,10 @@ public class WebMessageChannelChannelDelegate : ChannelDelegate {
         }
     }
     
-    public func onMessage(index: Int64, message: String?) {
+    public func onMessage(index: Int64, message: WebMessage?) {
         let arguments: [String:Any?] = [
             "index": index,
-            "message": message
+            "message": message?.toMap()
         ]
         channel?.invokeMethod("onMessage", arguments: arguments)
     }

macos/Classes/InAppWebView/WebMessage/WebMessageListenerChannelDelegate.swift

@@ -23,12 +23,13 @@ public class WebMessageListenerChannelDelegate : ChannelDelegate {
         case "postMessage":
             if let webView = webMessageListener?.webView, let jsObjectName = webMessageListener?.jsObjectName {
                 let jsObjectNameEscaped = jsObjectName.replacingOccurrences(of: "\'", with: "\\'")
-                let messageEscaped = (arguments!["message"] as! String).replacingOccurrences(of: "\'", with: "\\'")
+                let message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
+                
                 let source = """
                 (function() {
                     var webMessageListener = window['\(jsObjectNameEscaped)'];
                     if (webMessageListener != null) {
-                        var event = {data: '\(messageEscaped)'};
+                        var event = {data: \(message.jsData)};
                         if (webMessageListener.onmessage != null) {
                             webMessageListener.onmessage(event);
                         }
@@ -51,9 +52,9 @@ public class WebMessageListenerChannelDelegate : ChannelDelegate {
         }
     }
     
-    public func onPostMessage(message: String?, sourceOrigin: URL?, isMainFrame: Bool) {
+    public func onPostMessage(message: WebMessage?, sourceOrigin: URL?, isMainFrame: Bool) {
         let arguments: [String:Any?] = [
-            "message": message,
+            "message": message?.toMap(),
             "sourceOrigin": sourceOrigin?.absoluteString,
             "isMainFrame": isMainFrame
         ]

macos/Classes/InAppWebView/WebViewChannelDelegate.swift

@@ -480,23 +480,21 @@ public class WebViewChannelDelegate : ChannelDelegate {
             break
         case .postWebMessage:
             if let webView = webView {
-                let message = arguments!["message"] as! [String: Any?]
+                var message = WebMessage.fromMap(map: arguments!["message"] as! [String: Any?])
                 let targetOrigin = arguments!["targetOrigin"] as! String
                 
                 var ports: [WebMessagePort] = []
-                let portsMap = message["ports"] as? [[String: Any?]]
+                if let notConnectedPorts = message.ports {
-                if let portsMap = portsMap {
+                    for notConnectedPort in notConnectedPorts {
-                    for portMap in portsMap {
+                        if let webMessageChannel = webView.webMessageChannels[notConnectedPort.webMessageChannelId] {
-                        let webMessageChannelId = portMap["webMessageChannelId"] as! String
+                            ports.append(webMessageChannel.ports[Int(notConnectedPort.index)])
-                        let index = portMap["index"] as! Int
-                        if let webMessageChannel = webView.webMessageChannels[webMessageChannelId] {
-                            ports.append(webMessageChannel.ports[index])
                         }
                     }
                 }
-                let webMessage = WebMessage(data: message["data"] as? String, ports: ports)
+                message.ports = ports
+                
                 do {
-                    try webView.postWebMessage(message: webMessage, targetOrigin: targetOrigin) { (_) in
+                    try webView.postWebMessage(message: message, targetOrigin: targetOrigin) { (_) in
                         result(true)
                     }
                 } catch let error as NSError {

macos/Classes/PluginScriptsJS/WebMessageListenerJS.swift

@@ -13,7 +13,11 @@ function FlutterInAppWebViewWebMessageListener(jsObjectName) {
     this.listeners = [];
     this.onmessage = null;
 }
-FlutterInAppWebViewWebMessageListener.prototype.postMessage = function(message) {
+FlutterInAppWebViewWebMessageListener.prototype.postMessage = function(data) {
+    var message = {
+        "data": window.ArrayBuffer != null && data instanceof ArrayBuffer ? Array.from(new Uint8Array(data)) : (data != null ? data.toString() : null),
+        "type": window.ArrayBuffer != null && data instanceof ArrayBuffer ? 1 : 0
+    };
     window.webkit.messageHandlers['onWebMessageListenerPostMessageReceived'].postMessage({jsObjectName: this.jsObjectName, message: message});
 };
 FlutterInAppWebViewWebMessageListener.prototype.addEventListener = function(type, listener) {

macos/Classes/Types/WebMessage.swift

@@ -6,17 +6,55 @@
 //
 
 import Foundation
+import FlutterMacOS
 
-public class WebMessage : NSObject {
+public class WebMessage : NSObject, Disposable {
-    var data: String?
+    var data: Any?
+    var type: WebMessageType
     var ports: [WebMessagePort]?
     
-    public init(data: String?, ports: [WebMessagePort]?) {
+    var jsData: String {
+        var jsData: String = "null"
+        if let messageData = data {
+            if type == .arrayBuffer, let messageDataArrayBuffer = messageData as? FlutterStandardTypedData {
+                jsData = "new Uint8Array(\(Array(messageDataArrayBuffer.data))).buffer"
+            } else if let messageDataString = messageData as? String {
+                jsData = "'\(messageDataString.replacingOccurrences(of: "\'", with: "\\'"))'"
+            }
+        }
+        return jsData
+    }
+    
+    public init(data: Any?, type: WebMessageType, ports: [WebMessagePort]?) {
+        self.type = type
         super.init()
         self.data = data
         self.ports = ports
     }
     
+    public static func fromMap(map: [String: Any?]) -> WebMessage {
+        let portMapList = map["ports"] as? [[String: Any?]]
+        var ports: [WebMessagePort]? = nil
+        if let portMapList = portMapList, !portMapList.isEmpty {
+            ports = []
+            portMapList.forEach { (portMap) in
+                ports?.append(WebMessagePort.fromMap(map: portMap))
+            }
+        }
+        
+        return WebMessage(
+            data: map["data"] as? Any,
+            type: WebMessageType.init(rawValue: map["type"] as! Int)!,
+            ports: ports)
+    }
+    
+    public func toMap () -> [String: Any?] {
+        return [
+            "data": type == .arrayBuffer && data is [UInt8] ? Data(data as! [UInt8]) : data,
+            "type": type.rawValue
+        ]
+    }
+    
     public func dispose() {
         ports?.removeAll()
     }
@@ -26,3 +64,8 @@ public class WebMessage : NSObject {
         dispose()
     }
 }
+
+public enum WebMessageType: Int {
+    case string = 0
+    case arrayBuffer = 1
+}

macos/Classes/Types/WebMessagePort.swift

@@ -9,13 +9,17 @@ import Foundation
 
 public class WebMessagePort : NSObject {
     var name: String
+    var index: Int64
+    var webMessageChannelId: String
     var webMessageChannel: WebMessageChannel?
     var isClosed = false
     var isTransferred = false
     var isStarted = false
     
-    public init(name: String, webMessageChannel: WebMessageChannel) {
+    public init(name: String, index: Int64, webMessageChannelId: String, webMessageChannel: WebMessageChannel?) {
         self.name = name
+        self.index = index
+        self.webMessageChannelId = webMessageChannelId
         super.init()
         self.webMessageChannel = webMessageChannel
     }
@@ -35,7 +39,10 @@ public class WebMessagePort : NSObject {
                         window.webkit.messageHandlers["onWebMessagePortMessageReceived"].postMessage({
                             "webMessageChannelId": "\(webMessageChannel.id)",
                             "index": \(String(index)),
-                            "message": event.data
+                            "message": {
+                                "data": window.ArrayBuffer != null && event.data instanceof ArrayBuffer ? Array.from(new Uint8Array(event.data)) : (event.data != null ? event.data.toString() : null),
+                                "type": window.ArrayBuffer != null && event.data instanceof ArrayBuffer ? 1 : 0
+                            }
                         });
                     }
                 }
@@ -71,12 +78,12 @@ public class WebMessagePort : NSObject {
                 }
                 portsString = "[" + portArrayString.joined(separator: ", ") + "]"
             }
-            let data = message.data?.replacingOccurrences(of: "\'", with: "\\'") ?? "null"
+            
             let source = """
             (function() {
                 var webMessageChannel = \(WEB_MESSAGE_CHANNELS_VARIABLE_NAME)["\(webMessageChannel.id)"];
                 if (webMessageChannel != null) {
-                    webMessageChannel.\(self.name).postMessage('\(data)', \(portsString));
+                    webMessageChannel.\(self.name).postMessage(\(message.jsData), \(portsString));
                 }
             })();
             """
@@ -111,6 +118,23 @@ public class WebMessagePort : NSObject {
         }
     }
     
+    public static func fromMap(map: [String: Any?]) -> WebMessagePort {
+        let index = map["index"] as! Int64
+        return WebMessagePort(
+            name: "port\(String(index + 1))",
+            index: index,
+            webMessageChannelId: map["webMessageChannelId"] as! String,
+            webMessageChannel: nil)
+    }
+    
+    public func toMap () -> [String: Any?] {
+        return [
+            "name": name,
+            "index": index,
+            "webMessageChannelId": webMessageChannelId
+        ]
+    }
+    
     public func dispose() {
         isClosed = true
         webMessageChannel = nil

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_inappwebview
 description: A Flutter plugin that allows you to add an inline webview, to use an headless webview, and to open an in-app browser window.
-version: 6.0.0-beta.27
+version: 6.0.0-beta.28
 homepage: https://inappwebview.dev/
 repository: https://github.com/pichillilorenzo/flutter_inappwebview
 issue_tracker: https://github.com/pichillilorenzo/flutter_inappwebview/issues
@@ -21,7 +21,7 @@ dependencies:
   flutter_web_plugins:
     sdk: flutter
   js: ^0.6.4
-  flutter_inappwebview_internal_annotations: ^1.1.0
+  flutter_inappwebview_internal_annotations: ^1.1.1
 
 dev_dependencies:
   flutter_test: