Updated onLoadResource event, Updated WebResourceResponse class, Deleted...

Updated onLoadResource event, Updated WebResourceResponse class, Deleted WebResourceRequest class, added useOnDownloadStart option, created webview options classes, added initial content blocking support

CHANGELOG.md

@@ -9,9 +9,17 @@
 - Merge "migrating to swift 5.0" [#162](https://github.com/pichillilorenzo/flutter_inappbrowser/pull/162) (thanks to [fattiger00](https://github.com/fattiger00))
 - Merge "Update readme example" [#178](https://github.com/pichillilorenzo/flutter_inappbrowser/pull/178) (thanks to [SebastienBtr](https://github.com/SebastienBtr))
 - Added `horizontalScrollBarEnabled` and `verticalScrollBarEnabled` options to enable/disable the corresponding scrollbar of the WebView [#165](https://github.com/pichillilorenzo/flutter_inappbrowser/issues/165)
-- Added `onDownloadStart` event: event fires when the WebView recognizes and starts a downloadable file.
+- Added `onDownloadStart` event and `useOnDownloadStart` option: event fires when the WebView recognizes and starts a downloadable file.
 - Added `onLoadResourceCustomScheme` event and `resourceCustomSchemes` option to set custom schemes that WebView must handle to load resources
 - Added `onTargetBlank` event and `useOnTargetBlank` option to manage links with `target="_blank"`
+- Added `ContentBlocker`, `ContentBlockerTrigger` and `ContentBlockerAction` classes and the `contentBlockers` option that allows to define a set of rules to use to block content in the WebView
+
+### BREAKING CHANGES
+- Deleted `WebResourceRequest` class
+- Updated `WebResourceResponse` class
+- Updated `onLoadResource` event
+- WebView options are now available with the new corresponding classes: `InAppWebViewOptions`, `AndroidInAppWebViewOptions`, `iOSInAppWebViewOptions`, `InAppBrowserOptions`, `AndroidInAppBrowserOptions`, `iOSInAppBrowserOptions`, `AndroidChromeCustomTabsOptions` and `iOSChromeCustomTabsOptions`
+
 
 ## 1.2.1
 

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlocker.java

+package com.pichillilorenzo.flutter_inappbrowser.ContentBlocker;
+
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+import android.webkit.WebResourceResponse;
+
+import com.pichillilorenzo.flutter_inappbrowser.InAppWebView.InAppWebView;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class ContentBlocker {
+    protected static final String LOG_TAG = "ContentBlocker";
+
+    public static WebResourceResponse checkUrl(final InAppWebView webView, String url, ContentBlockerTriggerResourceType responseResourceType) {
+        if (webView.options.contentBlockers == null)
+            return null;
+
+        for (Map<String, Map<String, Object>> contentBlocker : webView.options.contentBlockers) {
+            ContentBlockerTrigger trigger =  ContentBlockerTrigger.fromMap(contentBlocker.get("trigger"));
+            List<ContentBlockerTriggerResourceType> resourceTypes = trigger.resourceType;
+
+            ContentBlockerAction action = ContentBlockerAction.fromMap(contentBlocker.get("action"));
+
+            Pattern mPattern = Pattern.compile(trigger.urlFilter);
+            Matcher m = mPattern.matcher(url);
+
+            if (m.matches()) {
+                Log.d(LOG_TAG, url);
+                Log.d(LOG_TAG, responseResourceType.toString());
+                Log.d(LOG_TAG, resourceTypes.toString());
+
+                if (resourceTypes != null && resourceTypes.size() > 0 && !resourceTypes.contains(responseResourceType)) {
+                    return null;
+                }
+                switch (action.type) {
+
+                    case BLOCK:
+                        return new WebResourceResponse("", "", null);
+
+                    case CSS_DISPLAY_NONE:
+                        final String jsScript = "function hide () { document.querySelectorAll('" + action.selector + "').forEach(function (item, index) { item.style.display = \"none\"; }); }; hide(); document.addEventListener(\"DOMContentLoaded\", function(event) { hide(); });";
+                        final Handler handler = new Handler(Looper.getMainLooper());
+                        Log.d(LOG_TAG, jsScript);
+                        handler.post(new Runnable() {
+                            @Override
+                            public void run() {
+                                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+                                    webView.evaluateJavascript(jsScript, null);
+                                } else {
+                                    webView.loadUrl("javascript:" + jsScript);
+                                }
+                            }
+                        });
+                        break;
+
+                    case MAKE_HTTPS:
+                        if (url.startsWith("http://")) {
+                            String urlHttps = url.replace("http://", "https://");
+
+                            Request mRequest = new Request.Builder().url(urlHttps).build();
+                            Response response = null;
+
+                            try {
+
+                                response = webView.httpClient.newCall(mRequest).execute();
+                                byte[] dataBytes = response.body().bytes();
+                                InputStream dataStream = new ByteArrayInputStream(dataBytes);
+
+                                String[] contentTypeSplitted = response.header("content-type", "text/plain").split(";");
+
+                                String contentType = contentTypeSplitted[0].trim();
+                                String encoding = (contentTypeSplitted.length > 1 && contentTypeSplitted[1].contains("charset="))
+                                        ? contentTypeSplitted[1].replace("charset=", "").trim()
+                                        : "utf-8";
+
+                                response.close();
+
+                                return new WebResourceResponse(contentType, encoding, dataStream);
+
+                            } catch (IOException e) {
+                                e.printStackTrace();
+                                if (response != null) {
+                                    response.close();
+                                }
+                                Log.e(LOG_TAG, e.getMessage());
+                            }
+                        }
+                        break;
+                }
+            }
+        }
+        return null;
+    }
+
+    public static WebResourceResponse checkUrl(final InAppWebView webView, String url) {
+        ContentBlockerTriggerResourceType responseResourceType = getResourceTypeFromUrl(webView, url);
+        return checkUrl(webView, url, responseResourceType);
+    }
+
+    public static WebResourceResponse checkUrl(final InAppWebView webView, String url, String contentType) {
+        ContentBlockerTriggerResourceType responseResourceType = getResourceTypeFromContentType(contentType);
+        return checkUrl(webView, url, responseResourceType);
+    }
+
+
+    public static ContentBlockerTriggerResourceType getResourceTypeFromUrl(InAppWebView webView, String url) {
+        ContentBlockerTriggerResourceType responseResourceType = ContentBlockerTriggerResourceType.RAW;
+
+        // make an HTTP "HEAD" request to the server for that URL. This will not return the full content of the URL.
+        if (url.startsWith("http://") || url.startsWith("https://")) {
+            Request mRequest = new Request.Builder().url(url).head().build();
+            Response response = null;
+            try {
+                response = webView.httpClient.newCall(mRequest).execute();
+
+                if (response.header("content-type") != null) {
+                    String[] contentTypeSplitted = response.header("content-type").split(";");
+
+                    String contentType = contentTypeSplitted[0].trim();
+                    String encoding = (contentTypeSplitted.length > 1 && contentTypeSplitted[1].contains("charset="))
+                            ? contentTypeSplitted[1].replace("charset=", "").trim()
+                            : "utf-8";
+
+                    response.close();
+                    responseResourceType = getResourceTypeFromContentType(contentType);
+                }
+
+            } catch (IOException e) {
+                if (response != null) {
+                    response.close();
+                }
+                e.printStackTrace();
+            }
+        }
+        return responseResourceType;
+    }
+
+    public static ContentBlockerTriggerResourceType getResourceTypeFromContentType(String contentType) {
+        ContentBlockerTriggerResourceType responseResourceType = ContentBlockerTriggerResourceType.RAW;
+
+        // https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
+        if (contentType.equals("text/css")) {
+            responseResourceType = ContentBlockerTriggerResourceType.STYLE_SHEET;
+        } else if (contentType.equals("image/svg+xml")) {
+            responseResourceType = ContentBlockerTriggerResourceType.SVG_DOCUMENT;
+        } else if (contentType.startsWith("image/")) {
+            responseResourceType = ContentBlockerTriggerResourceType.IMAGE;
+        } else if (contentType.startsWith("font/")) {
+            responseResourceType = ContentBlockerTriggerResourceType.FONT;
+        } else if (contentType.startsWith("audio/") || contentType.startsWith("video/") || contentType.equals("application/ogg")) {
+            responseResourceType = ContentBlockerTriggerResourceType.MEDIA;
+        } else if (contentType.endsWith("javascript")) {
+            responseResourceType = ContentBlockerTriggerResourceType.SCRIPT;
+        } else if (contentType.startsWith("text/")) {
+            responseResourceType = ContentBlockerTriggerResourceType.DOCUMENT;
+        }
+
+        return responseResourceType;
+    }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerAction.java

+package com.pichillilorenzo.flutter_inappbrowser.ContentBlocker;
+
+import java.util.Map;
+
+public class ContentBlockerAction {
+    ContentBlockerActionType type;
+    String selector;
+
+    ContentBlockerAction(ContentBlockerActionType type, String selector) {
+        this.type = type;
+        if (this.type.equals(ContentBlockerActionType.CSS_DISPLAY_NONE)) {
+            assert(selector != null);
+        }
+        this.selector = selector;
+    }
+
+    public static ContentBlockerAction fromMap(Map<String, Object> map) {
+        ContentBlockerActionType type = ContentBlockerActionType.fromValue((String) map.get("type"));
+        String selector = (String) map.get("selector");
+        return new ContentBlockerAction(type, selector);
+    }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerActionType.java

+package com.pichillilorenzo.flutter_inappbrowser.ContentBlocker;
+
+public enum ContentBlockerActionType {
+    BLOCK ("block"),
+    CSS_DISPLAY_NONE ("css-display-none"),
+    MAKE_HTTPS ("make-https");
+
+    private final String value;
+
+    private ContentBlockerActionType(String value) {
+        this.value = value;
+    }
+
+    public boolean equalsValue(String otherValue) {
+        return value.equals(otherValue);
+    }
+
+    public static ContentBlockerActionType fromValue(String value) {
+        for( ContentBlockerActionType type : ContentBlockerActionType.values()) {
+            if(value.equals(type.value))
+                return type;
+        }
+        throw new IllegalArgumentException("No enum constant: " + value);
+    }
+
+    public String toString() {
+        return this.value;
+    }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerTrigger.java

+package com.pichillilorenzo.flutter_inappbrowser.ContentBlocker;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class ContentBlockerTrigger {
+
+    public String urlFilter;
+    List<ContentBlockerTriggerResourceType> resourceType = new ArrayList<>();
+
+    public ContentBlockerTrigger(String urlFilter, List<ContentBlockerTriggerResourceType> resourceType) {
+        this.urlFilter = urlFilter;
+        this.resourceType = resourceType != null ? resourceType : this.resourceType;
+    }
+
+    public static ContentBlockerTrigger fromMap(Map<String, Object> map) {
+        String urlFilter = (String) map.get("url-filter");
+        List<String> resourceTypeStringList = (List<String>) map.get("resource-type");
+        List<ContentBlockerTriggerResourceType> resourceType = new ArrayList<>();
+        for (String type : resourceTypeStringList) {
+            resourceType.add(ContentBlockerTriggerResourceType.fromValue(type));
+        }
+        return new ContentBlockerTrigger(urlFilter, resourceType);
+    }
+
+}

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerTriggerResourceType.java

+package com.pichillilorenzo.flutter_inappbrowser.ContentBlocker;
+
+public enum ContentBlockerTriggerResourceType {
+    DOCUMENT ("document"),
+    IMAGE ("image"),
+    STYLE_SHEET ("style-sheet"),
+    SCRIPT ("script"),
+    FONT ("font"),
+    SVG_DOCUMENT ("svg-document"),
+    MEDIA ("media"),
+    RAW ("raw");
+
+    private final String value;
+
+    private ContentBlockerTriggerResourceType(String value) {
+        this.value = value;
+    }
+
+    public boolean equalsValue(String otherValue) {
+        return value.equals(otherValue);
+    }
+
+    public static ContentBlockerTriggerResourceType fromValue(String value) {
+        for( ContentBlockerTriggerResourceType type : ContentBlockerTriggerResourceType.values()) {
+            if(value.equals(type.value))
+                return type;
+        }
+        throw new IllegalArgumentException("No enum constant: " + value);
+    }
+
+    public String toString() {
+        return this.value;
+    }
+}

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebView.java

 package com.pichillilorenzo.flutter_inappbrowser.InAppWebView;
 
-import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Bitmap;
@@ -23,7 +22,6 @@ import com.pichillilorenzo.flutter_inappbrowser.FlutterWebView;
 import com.pichillilorenzo.flutter_inappbrowser.InAppBrowserActivity;
 import com.pichillilorenzo.flutter_inappbrowser.InAppBrowserFlutterPlugin;
 import com.pichillilorenzo.flutter_inappbrowser.JavaScriptBridgeInterface;
-import com.pichillilorenzo.flutter_inappbrowser.RequestPermissionHandler;
 import com.pichillilorenzo.flutter_inappbrowser.Util;
 
 import java.io.ByteArrayOutputStream;
@@ -47,11 +45,11 @@ public class InAppWebView extends WebView {
   public InAppBrowserActivity inAppBrowserActivity;
   public FlutterWebView flutterWebView;
   public int id;
-  InAppWebViewClient inAppWebViewClient;
-  InAppWebChromeClient inAppWebChromeClient;
+  public InAppWebViewClient inAppWebViewClient;
+  public InAppWebChromeClient inAppWebChromeClient;
   public InAppWebViewOptions options;
   public boolean isLoading = false;
-  OkHttpClient httpClient;
+  public OkHttpClient httpClient;
   int okHttpClientCacheSize = 10 * 1024 * 1024; // 10MB
 
   static final String consoleLogJS = "(function() {" +
@@ -80,6 +78,15 @@ public class InAppWebView extends WebView {
           "   }" +
           "})();";
 
+  static final String resourceObserverJS = "(function() {" +
+          "   var observer = new PerformanceObserver(function(list) {" +
+          "       list.getEntries().forEach(function(entry) {" +
+          "         window." + JavaScriptBridgeInterface.name + "._resourceLoaded(JSON.stringify(entry));" +
+          "       });" +
+          "   });" +
+          "   observer.observe({entryTypes: ['resource']});" +
+          "})();";
+
   static final String platformReadyJS = "window.dispatchEvent(new Event('flutterInAppBrowserPlatformReady'));";
 
   public InAppWebView(Context context) {
@@ -117,7 +124,8 @@ public class InAppWebView extends WebView {
 
     boolean isFromInAppBrowserActivity = inAppBrowserActivity != null;
 
-    httpClient = new OkHttpClient().newBuilder().cache(new Cache(getContext().getCacheDir(), okHttpClientCacheSize)).build();
+    //httpClient = new OkHttpClient().newBuilder().cache(new Cache(getContext().getCacheDir(), okHttpClientCacheSize)).build();
+    httpClient = new OkHttpClient().newBuilder().build();
 
     addJavascriptInterface(new JavaScriptBridgeInterface((isFromInAppBrowserActivity) ? inAppBrowserActivity : flutterWebView), JavaScriptBridgeInterface.name);
 
@@ -127,23 +135,8 @@ public class InAppWebView extends WebView {
     inAppWebViewClient = new InAppWebViewClient((isFromInAppBrowserActivity) ? inAppBrowserActivity : flutterWebView);
     setWebViewClient(inAppWebViewClient);
 
-    setDownloadListener(new DownloadListener() {
-        @Override
-        public void onDownloadStart(final String url, final String userAgent,
-                                    final String contentDisposition, final String mimetype,
-                                    final long contentLength) {
-            RequestPermissionHandler.checkAndRun(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE, RequestPermissionHandler.REQUEST_CODE_WRITE_EXTERNAL_STORAGE, new Runnable(){
-                @Override
-                public void run(){
-                    Map<String, Object> obj = new HashMap<>();
-                    if (inAppBrowserActivity != null)
-                      obj.put("uuid", inAppBrowserActivity.uuid);
-                    obj.put("url", url);
-                    getChannel().invokeMethod("onDownloadStart", obj);
-                }
-            });
-        }
-    });
+    if (options.useOnDownloadStart)
+      setDownloadListener(new DownloadStartListener());
 
     WebSettings settings = getSettings();
 
@@ -396,6 +389,14 @@ public class InAppWebView extends WebView {
     if (newOptionsMap.get("useOnTargetBlank") != null && options.useOnTargetBlank != newOptions.useOnTargetBlank)
       settings.setSupportMultipleWindows(newOptions.useOnTargetBlank);
 
+    if (newOptionsMap.get("useOnDownloadStart") != null && options.useOnDownloadStart != newOptions.useOnDownloadStart) {
+      if (newOptions.useOnDownloadStart) {
+        setDownloadListener(new DownloadStartListener());
+      } else {
+        setDownloadListener(null);
+      }
+    }
+
     options = newOptions;
   }
 
@@ -534,6 +535,17 @@ public class InAppWebView extends WebView {
     return (inAppBrowserActivity != null) ? InAppBrowserFlutterPlugin.instance.channel : flutterWebView.channel;
   }
 
+  class DownloadStartListener implements DownloadListener {
+    @Override
+    public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
+      Map<String, Object> obj = new HashMap<>();
+      if (inAppBrowserActivity != null)
+        obj.put("uuid", inAppBrowserActivity.uuid);
+      obj.put("url", url);
+      getChannel().invokeMethod("onDownloadStart", obj);
+    }
+  }
+
   @Override
   public void destroy() {
     super.destroy();

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebViewClient.java

@@ -5,10 +5,6 @@ import android.graphics.Bitmap;
 import android.net.Uri;
 import android.net.http.SslError;
 import android.os.Build;
-import androidx.annotation.RequiresApi;
-
-import android.os.Handler;
-import android.os.Looper;
 import android.util.Base64;
 import android.util.Log;
 import android.webkit.CookieManager;
@@ -21,6 +17,9 @@ import android.webkit.WebResourceResponse;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 
+import androidx.annotation.RequiresApi;
+
+import com.pichillilorenzo.flutter_inappbrowser.ContentBlocker.ContentBlocker;
 import com.pichillilorenzo.flutter_inappbrowser.FlutterWebView;
 import com.pichillilorenzo.flutter_inappbrowser.InAppBrowserActivity;
 import com.pichillilorenzo.flutter_inappbrowser.InAppBrowserFlutterPlugin;
@@ -28,15 +27,10 @@ import com.pichillilorenzo.flutter_inappbrowser.JavaScriptBridgeInterface;
 import com.pichillilorenzo.flutter_inappbrowser.Util;
 
 import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.io.InputStream;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 
 import io.flutter.plugin.common.MethodChannel;
-import okhttp3.Request;
-import okhttp3.Response;
 
 public class InAppWebViewClient extends WebViewClient {
 
@@ -185,12 +179,16 @@ public class InAppWebViewClient extends WebViewClient {
    */
   @Override
   public void onPageStarted(WebView view, String url, Bitmap favicon) {
-    super.onPageStarted(view, url, favicon);
 
-    startPageTime = System.currentTimeMillis();
+    InAppWebView webView = (InAppWebView) view;
 
-    ((inAppBrowserActivity != null) ? inAppBrowserActivity.webView : flutterWebView.webView).isLoading = true;
+    if (webView.options.useOnLoadResource)
+      webView.loadUrl("javascript:" + webView.resourceObserverJS.replaceAll("[\r\n]+", ""));
+
+    super.onPageStarted(view, url, favicon);
 
+    startPageTime = System.currentTimeMillis();
+    webView.isLoading = true;
     if (inAppBrowserActivity != null && inAppBrowserActivity.searchView != null && !url.equals(inAppBrowserActivity.searchView.getQuery().toString())) {
       inAppBrowserActivity.searchView.setQuery(url, false);
     }
@@ -204,9 +202,11 @@ public class InAppWebViewClient extends WebViewClient {
 
 
   public void onPageFinished(final WebView view, String url) {
+    InAppWebView webView = (InAppWebView) view;
+
     super.onPageFinished(view, url);
 
-    ((inAppBrowserActivity != null) ? inAppBrowserActivity.webView : flutterWebView.webView).isLoading = false;
+    webView.isLoading = false;
 
     // CB-10395 InAppBrowserFlutterPlugin's WebView not storing cookies reliable to local device storage
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
@@ -305,7 +305,7 @@ public class InAppWebViewClient extends WebViewClient {
   @Override
   public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
 
-    InAppWebView webView = (InAppWebView) view;
+    final InAppWebView webView = (InAppWebView) view;
 
     final String url = request.getUrl().toString();
     String scheme = request.getUrl().getScheme();
@@ -324,105 +324,16 @@ public class InAppWebViewClient extends WebViewClient {
       }
       else if (flutterResult.result != null) {
         Map<String, String> res = (Map<String, String>) flutterResult.result;
+        WebResourceResponse response = ContentBlocker.checkUrl(webView, url, res.get("content-type"));
+        if (response != null)
+          return response;
         byte[] data = Base64.decode(res.get("base64data"), Base64.DEFAULT);
         return new WebResourceResponse(res.get("content-type"), res.get("content-encoding"), new ByteArrayInputStream(data));
       }
     }
 
-    if (!request.getMethod().toLowerCase().equals("get") ||
-            !(((inAppBrowserActivity != null) ? inAppBrowserActivity.webView : flutterWebView.webView).options.useOnLoadResource)) {
-      return null;
-    }
-
-    try {
-      Request mRequest = new Request.Builder().url(url).build();
-
-      long startResourceTime = System.currentTimeMillis();
-      Response response = ((inAppBrowserActivity != null) ? inAppBrowserActivity.webView : flutterWebView.webView).httpClient.newCall(mRequest).execute();
-      long startTime = startResourceTime - startPageTime;
-      startTime = (startTime < 0) ? 0 : startTime;
-      long duration = System.currentTimeMillis() - startResourceTime;
-
-      if (response.cacheResponse() != null) {
-        duration = 0;
-      }
-
-      String reasonPhrase = response.message();
-      if (reasonPhrase.equals("")) {
-        reasonPhrase = statusCodeMapping.get(response.code());
-      }
-      reasonPhrase = (reasonPhrase.equals("") || reasonPhrase == null) ? "OK" : reasonPhrase;
-
-      Map<String, String> headersResponse = new HashMap<String, String>();
-      for (Map.Entry<String, List<String>> entry : response.headers().toMultimap().entrySet()) {
-        StringBuilder value = new StringBuilder();
-        for (String val : entry.getValue()) {
-          value.append((value.toString().isEmpty()) ? val : "; " + val);
-        }
-        headersResponse.put(entry.getKey().toLowerCase(), value.toString());
-      }
-
-      Map<String, String> headersRequest = new HashMap<String, String>();
-      for (Map.Entry<String, List<String>> entry : mRequest.headers().toMultimap().entrySet()) {
-        StringBuilder value = new StringBuilder();
-        for (String val : entry.getValue()) {
-          value.append((value.toString().isEmpty()) ? val : "; " + val);
-        }
-        headersRequest.put(entry.getKey().toLowerCase(), value.toString());
-      }
-
-      final Map<String, Object> obj = new HashMap<>();
-      Map<String, Object> res = new HashMap<>();
-      Map<String, Object> req = new HashMap<>();
-
-      if (inAppBrowserActivity != null)
-        obj.put("uuid", inAppBrowserActivity.uuid);
-
-      byte[] dataBytes = response.body().bytes();
-      InputStream dataStream = new ByteArrayInputStream(dataBytes);
-
-      res.put("url", url);
-      res.put("statusCode", response.code());
-      res.put("headers", headersResponse);
-      res.put("startTime", startTime);
-      res.put("duration", duration);
-      res.put("data", dataBytes);
-
-      req.put("url", url);
-      req.put("headers", headersRequest);
-      req.put("method", mRequest.method());
-
-      obj.put("response", res);
-      obj.put("request", req);
-
-      // java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread.
-      // https://github.com/pichillilorenzo/flutter_inappbrowser/issues/98
-      final Handler handler = new Handler(Looper.getMainLooper());
-      handler.post(new Runnable() {
-         @Override
-         public void run() {
-           getChannel().invokeMethod("onLoadResource", obj);
-         }
-       });
-
-      // this return is not working (it blocks some resources), so return null
-//      return new WebResourceResponse(
-//              response.header("content-type", "text/plain").split(";")[0].trim(),
-//              response.header("content-encoding", "utf-8"),
-//              response.code(),
-//              reasonPhrase,
-//              headersResponse,
-//              dataStream
-//      );
-    } catch (IOException e) {
-      e.printStackTrace();
-      Log.d(LOG_TAG, e.getMessage());
-    } catch (Exception e) {
-      e.printStackTrace();
-      Log.d(LOG_TAG, e.getMessage());
-    }
-
-    return null;
+    WebResourceResponse response = ContentBlocker.checkUrl(webView, url);
+    return response;
   }
 
   private MethodChannel getChannel() {

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebViewOptions.java

@@ -4,6 +4,7 @@ import com.pichillilorenzo.flutter_inappbrowser.Options;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 public class InAppWebViewOptions extends Options {
 
@@ -11,6 +12,7 @@ public class InAppWebViewOptions extends Options {
 
   public boolean useShouldOverrideUrlLoading = false;
   public boolean useOnLoadResource = false;
+  public boolean useOnDownloadStart = false;
   public boolean useOnTargetBlank = false;
   public boolean clearCache = false;
   public String userAgent = "";
@@ -21,6 +23,7 @@ public class InAppWebViewOptions extends Options {
   public boolean verticalScrollBarEnabled = true;
   public boolean horizontalScrollBarEnabled = true;
   public List<String> resourceCustomSchemes = new ArrayList<>();
+  public List<Map<String, Map<String, Object>>> contentBlockers = new ArrayList<>();
 
   public boolean clearSessionCache = false;
   public boolean builtInZoomControls = false;

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/JavaScriptBridgeInterface.java

@@ -8,6 +8,11 @@ import android.webkit.JavascriptInterface;
 
 import com.pichillilorenzo.flutter_inappbrowser.InAppWebView.InAppWebView;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -77,7 +82,42 @@ public class JavaScriptBridgeInterface {
         });
       }
     });
+  }
+
+  @JavascriptInterface
+  public void _resourceLoaded(String json) {
+    try {
+
+      JSONObject jsonObject = new JSONObject(json);
+
+      final Map<String, Object> obj = new HashMap<>();
+
+      if (inAppBrowserActivity != null)
+        obj.put("uuid", inAppBrowserActivity.uuid);
+
+      String initiatorType = jsonObject.getString("initiatorType");
+      String url = jsonObject.getString("name");
+      Double startTime = jsonObject.getDouble("startTime");
+      Double duration = jsonObject.getDouble("duration");
+
+      obj.put("initiatorType", initiatorType);
+      obj.put("url", url);
+      obj.put("startTime", startTime);
+      obj.put("duration", duration);
+
+      // java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread.
+      // https://github.com/pichillilorenzo/flutter_inappbrowser/issues/98
+      final Handler handler = new Handler(Looper.getMainLooper());
+      handler.post(new Runnable() {
+        @Override
+        public void run() {
+          getChannel().invokeMethod("onLoadResource", obj);
+        }
+      });
 
+    } catch (final JSONException e) {
+      Log.e(LOG_TAG, "Json parsing error: " + e.getMessage());
+    }
   }
 
   private MethodChannel getChannel() {

example/android/app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
     <application
         android:name="com.pichillilorenzo.flutterwebviewexample.MyApplication"
         android:label="flutter_inappbrowser_example"
+        android:usesCleartextTraffic="true"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"

example/assets/index.html

@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>Flutter InAppBrowser</title>
-    <link rel="stylesheet" href="https://getbootstrap.com/docs/4.3/dist/css/bootstrap.min.css">
+    <link rel="stylesheet" href="http://getbootstrap.com/docs/4.3/dist/css/bootstrap.min.css">
     <link rel="stylesheet" href="css/style.css">
     <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
 </head>

example/lib/inline_example.screen.dart

@@ -65,14 +65,21 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
             //initialUrl: "https://flutter.dev/",
             initialFile: "assets/index.html",
             initialHeaders: {},
-            initialOptions: {
-              //"mediaPlaybackRequiresUserGesture": false,
-              //"allowsInlineMediaPlayback": true,
-              "useShouldOverrideUrlLoading": true,
-              "useOnTargetBlank": true,
-              "resourceCustomSchemes": ["my-special-custom-scheme"],
-              //"useOnLoadResource": true
-            },
+            initialOptions: [
+              InAppWebViewOptions(
+                useShouldOverrideUrlLoading: true,
+                useOnTargetBlank: true,
+                //useOnLoadResource: true,
+                useOnDownloadStart: true,
+                resourceCustomSchemes: ["my-special-custom-scheme"],
+                contentBlockers: [
+                  ContentBlocker(
+                      ContentBlockerTrigger(".*", resourceType: [ContentBlockerTriggerResourceType.IMAGE]),
+                      ContentBlockerAction(ContentBlockerActionType.BLOCK)
+                  )
+                ]
+              )
+            ],
             onWebViewCreated: (InAppWebViewController controller) {
               webView = controller;
 
@@ -104,8 +111,8 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
               print("override $url");
               controller.loadUrl(url);
             },
-            onLoadResource: (InAppWebViewController controller, WebResourceResponse response, WebResourceRequest request) {
-              print("Started at: " +
+            onLoadResource: (InAppWebViewController controller, WebResourceResponse response) {
+              print("Resource type: '"+response.initiatorType + "' started at: " +
                   response.startTime.toString() +
                   "ms ---> duration: " +
                   response.duration.toString() +
@@ -113,13 +120,13 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
                   response.url);
             },
             onConsoleMessage: (InAppWebViewController controller, ConsoleMessage consoleMessage) {
-//              print("""
-//              console output:
-//                sourceURL: ${consoleMessage.sourceURL}
-//                lineNumber: ${consoleMessage.lineNumber}
-//                message: ${consoleMessage.message}
-//                messageLevel: ${consoleMessage.messageLevel}
-//              """);
+              print("""
+              console output:
+                sourceURL: ${consoleMessage.sourceURL}
+                lineNumber: ${consoleMessage.lineNumber}
+                message: ${consoleMessage.message}
+                messageLevel: ${consoleMessage.messageLevel}
+              """);
             },
             onDownloadStart: (InAppWebViewController controller, String url) async {
               final taskId = await FlutterDownloader.enqueue(
@@ -133,7 +140,7 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
               if (scheme == "my-special-custom-scheme") {
                 var bytes = await rootBundle.load("assets/" + url.replaceFirst("my-special-custom-scheme://", "", 0));
                 var asBase64 = base64.encode(bytes.buffer.asUint8List());
-                var response = new CustomSchemeResponse(asBase64, "image/svg+xml", "utf-8");
+                var response = new CustomSchemeResponse(asBase64, "image/svg+xml", contentEnconding: "utf-8");
                 return response;
               }
               return null;

example/lib/test.dart

@@ -400,9 +400,7 @@ class _MyAppState extends State<MyApp> {
                     initialHeaders: {
 
                     },
-                    initialOptions: {
-
-                    },
+                    initialOptions: [],
                     onWebViewCreated: (InAppWebViewController controller) {
                       webView = controller;
                     },

example/lib/webview_example.screen.dart

@@ -47,7 +47,7 @@ class MyInappBrowser extends InAppBrowser {
  }
 
  @override
- void onLoadResource(WebResourceResponse response, WebResourceRequest request) {
+ void onLoadResource(WebResourceResponse response) {
    print("Started at: " +
        response.startTime.toString() +
        "ms ---> duration: " +

ios/Classes/InAppWebView.swift

@@ -63,7 +63,7 @@ let resourceObserverJS = """
             window.webkit.messageHandlers['resourceLoaded'].postMessage(JSON.stringify(entry));
         });
     });
-    observer.observe({entryTypes: ['resource', 'mark', 'measure']});
+    observer.observe({entryTypes: ['resource']});
 })();
 """
 
@@ -586,26 +586,28 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
                  decidePolicyFor navigationResponse: WKNavigationResponse,
                  decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {
         
-        if (options?.useOnLoadResource)! {
+//        if (options?.useOnLoadResource)! {
+//            if let url = navigationResponse.response.url {
+//                if WKNavigationMap[url.absoluteString] != nil {
+//                    let startResourceTime: Int64 = (WKNavigationMap[url.absoluteString]!["startTime"] as! Int64)
+//                    let startTime: Int64 = startResourceTime - startPageTime;
+//                    let duration: Int64 = currentTimeInMilliSeconds() - startResourceTime;
+//                    onLoadResource(response: navigationResponse.response, fromRequest: WKNavigationMap[url.absoluteString]!["request"] as? URLRequest, withData: Data(), startTime: startTime, duration: duration)
+//                }
+//            }
+//        }
+        
+        if (options?.useOnDownloadStart)! {
+            let mimeType = navigationResponse.response.mimeType
             if let url = navigationResponse.response.url {
-                if WKNavigationMap[url.absoluteString] != nil {
-                    let startResourceTime: Int64 = (WKNavigationMap[url.absoluteString]!["startTime"] as! Int64)
-                    let startTime: Int64 = startResourceTime - startPageTime;
-                    let duration: Int64 = currentTimeInMilliSeconds() - startResourceTime;
-                    onLoadResource(response: navigationResponse.response, fromRequest: WKNavigationMap[url.absoluteString]!["request"] as? URLRequest, withData: Data(), startTime: startTime, duration: duration)
+                if mimeType != nil && !mimeType!.starts(with: "text/") {
+                    onDownloadStart(url: url.absoluteString)
+                    decisionHandler(.cancel)
+                    return
                 }
             }
         }
         
-        let mimeType = navigationResponse.response.mimeType
-        if let url = navigationResponse.response.url {
-            if mimeType != nil && !mimeType!.starts(with: "text/") {
-                onDownloadStart(url: url.absoluteString)
-                decisionHandler(.cancel)
-                return
-            }
-        }
-        
         decisionHandler(.allow)
     }
     
@@ -703,27 +705,12 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         }
     }
     
-    public func onLoadResource(response: URLResponse, fromRequest request: URLRequest?, withData data: Data, startTime: Int64, duration: Int64) {
-        var headersResponse = (response as! HTTPURLResponse).allHeaderFields as! [String: String]
-        headersResponse.lowercaseKeys()
-        
-        var headersRequest = request!.allHTTPHeaderFields! as [String: String]
-        headersRequest.lowercaseKeys()
-        
+    public func onLoadResource(initiatorType: String, url: String, startTime: Double, duration: Double) {
         var arguments: [String : Any] = [
-            "response": [
-                "url": response.url!.absoluteString,
-                "statusCode": (response as! HTTPURLResponse).statusCode,
-                "headers": headersResponse,
-                "startTime": startTime,
-                "duration": duration,
-                "data": data
-            ],
-            "request": [
-                "url": request!.url!.absoluteString,
-                "headers": headersRequest,
-                "method": request!.httpMethod!
-            ]
+            "initiatorType": initiatorType,
+            "url": url,
+            "startTime": startTime,
+            "duration": duration
         ]
         if IABController != nil {
             arguments["uuid"] = IABController!.uuid
@@ -852,24 +839,11 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
                 if !UIApplication.shared.canOpenURL(url) {
                     return
                 }
-                let startTime: Int64 = Int64(resource["startTime"] as! Double)
-                let duration: Int64 = Int64(resource["duration"] as! Double)
-                var urlRequest = URLRequest(url: url)
-                urlRequest.allHTTPHeaderFields = [:]
-                let config = URLSessionConfiguration.default
-                let session = URLSession(configuration: config)
-                let task = session.dataTask(with: urlRequest) { (data, response, error) in
-                    if error != nil {
-                        print(error)
-                        return
-                    }
-                    var withData = data
-                    if withData == nil {
-                        withData = Data()
-                    }
-                    self.onLoadResource(response: response!, fromRequest: urlRequest, withData: withData!, startTime: startTime, duration: duration)
-                }
-                task.resume()
+                let initiatorType = resource["initiatorType"] as! String
+                let startTime = resource["startTime"] as! Double
+                let duration = resource["duration"] as! Double
+                
+                self.onLoadResource(initiatorType: initiatorType, url: url.absoluteString, startTime: startTime, duration: duration)
             }
         }
         else if message.name == "callHandler" {

ios/Classes/InAppWebViewOptions.swift

@@ -12,6 +12,7 @@ public class InAppWebViewOptions: Options {
     
     var useShouldOverrideUrlLoading = false
     var useOnLoadResource = false
+    var useOnDownloadStart = false
     var useOnTargetBlank = false
     var clearCache = false
     var userAgent = ""
@@ -21,6 +22,7 @@ public class InAppWebViewOptions: Options {
     var verticalScrollBarEnabled = true
     var horizontalScrollBarEnabled = true
     var resourceCustomSchemes: [String] = []
+    var contentBlockers: [[String: [String : Any]]] = []
     
     var disallowOverScroll = false
     var enableViewportScale = false

lib/flutter_inappbrowser.dart

@@ -28,4 +28,5 @@ export 'src/channel_manager.dart';
 export 'src/chrome_safari_browser.dart';
 export 'src/chrome_safari_browser.dart';
 export 'src/in_app_localhost_server.dart';
-export 'src/web_history.dart';
+export 'src/webview_options.dart';
+export 'src/content_blocker.dart';

lib/src/content_blocker.dart

+class ContentBlocker {
+  ContentBlockerTrigger trigger;
+  ContentBlockerAction action;
+
+  ContentBlocker(this.trigger, this.action);
+
+  Map<String, Map<String, dynamic>> toMap() {
+    return {
+      "trigger": trigger.toMap(),
+      "action": action.toMap()
+    };
+  }
+}
+
+class ContentBlockerTriggerResourceType {
+  final String _value;
+  const ContentBlockerTriggerResourceType._internal(this._value);
+  toString() => _value;
+
+  static const DOCUMENT = const ContentBlockerTriggerResourceType._internal('document');
+  static const IMAGE = const ContentBlockerTriggerResourceType._internal('image');
+  static const STYLE_SHEET = const ContentBlockerTriggerResourceType._internal('style-sheet');
+  static const SCRIPT = const ContentBlockerTriggerResourceType._internal('script');
+  static const FONT = const ContentBlockerTriggerResourceType._internal('font');
+  static const MEDIA = const ContentBlockerTriggerResourceType._internal('media');
+  static const SVG_DOCUMENT = const ContentBlockerTriggerResourceType._internal('svg-document');
+  static const RAW = const ContentBlockerTriggerResourceType._internal('raw');
+}
+
+class ContentBlockerTrigger {
+  String urlFilter;
+  List<ContentBlockerTriggerResourceType> resourceType;
+
+  ContentBlockerTrigger(this.urlFilter, {this.resourceType = const []});
+
+  Map<String, dynamic> toMap() {
+    List<String> resourceTypeStringList = [];
+    resourceType.forEach((type) {
+      resourceTypeStringList.add(type.toString());
+    });
+
+    return {
+      "url-filter": urlFilter,
+      "resource-type": resourceTypeStringList
+    };
+  }
+}
+
+class ContentBlockerActionType {
+  final String _value;
+  const ContentBlockerActionType._internal(this._value);
+  toString() => _value;
+
+  static const BLOCK = const ContentBlockerActionType._internal('block');
+  static const CSS_DISPLAY_NONE = const ContentBlockerActionType._internal('css-display-none');
+  static const MAKE_HTTPS = const ContentBlockerActionType._internal('make-https');
+}
+
+class ContentBlockerAction {
+  ContentBlockerActionType type;
+  String selector;
+
+  ContentBlockerAction(ContentBlockerActionType type, {String selector}) {
+    this.type = type;
+    if (this.type == ContentBlockerActionType.CSS_DISPLAY_NONE) {
+      assert(selector != null);
+    }
+    this.selector = selector;
+  }
+
+  Map<String, dynamic> toMap() {
+    return {
+      "type": type.toString(),
+      "selector": selector
+    };
+  }
+}
\ No newline at end of file

lib/src/in_app_browser.dart

@@ -52,6 +52,7 @@ class InAppBrowser {
   ///  - All platforms support:
   ///    - __useShouldOverrideUrlLoading__: Set to `true` to be able to listen at the [shouldOverrideUrlLoading()] event. The default value is `false`.
   ///    - __useOnLoadResource__: Set to `true` to be able to listen at the [onLoadResource()] event. The default value is `false`.
+  ///    - __useOnDownloadStart__: Set to `true` to be able to listen at the [onDownloadStart()] event. The default value is `false`.
   ///    - __useOnTargetBlank__: Set to `true` to be able to listen at the [onTargetBlank()] event. The default value is `false`.
   ///    - __clearCache__: Set to `true` to have all the browser's cache cleared before the new window is opened. The default value is `false`.
   ///    - __userAgent__: Set the custom WebView's user-agent.
@@ -296,9 +297,7 @@ class InAppBrowser {
   ///Event fires when the [InAppBrowser] webview loads a resource.
   ///
   ///**NOTE**: In order to be able to listen this event, you need to set `useOnLoadResource` option to `true`.
-  ///
-  ///**NOTE only for iOS**: In some cases, the [response.data] of a [response] with `text/assets` encoding could be empty.
-  void onLoadResource(WebResourceResponse response, WebResourceRequest request) {
+  void onLoadResource(WebResourceResponse response) {
 
   }
 

lib/src/in_app_webview.dart

@@ -12,8 +12,8 @@ import 'package:flutter/gestures.dart';
 
 import 'types.dart';
 import 'in_app_browser.dart';
-import 'web_history.dart';
 import 'channel_manager.dart';
+import 'webview_options.dart';
 
 
 ///Initial [data] as a content for an [InAppWebView] instance, using [baseUrl] as the base URL for it.
@@ -44,6 +44,7 @@ class InAppWebViewInitialData {
 ///All platforms support these options:
 ///  - __useShouldOverrideUrlLoading__: Set to `true` to be able to listen at the [InAppWebView.shouldOverrideUrlLoading()] event. The default value is `false`.
 ///  - __useOnLoadResource__: Set to `true` to be able to listen at the [InAppWebView.onLoadResource()] event. The default value is `false`.
+///  - __useOnDownloadStart__: Set to `true` to be able to listen at the [InAppWebView.onDownloadStart()] event. The default value is `false`.
 ///  - __useOnTargetBlank__: Set to `true` to be able to listen at the [InAppWebView.onTargetBlank()] event. The default value is `false`.
 ///  - __clearCache__: Set to `true` to have all the browser's cache cleared before the new window is opened. The default value is `false`.
 ///  - __userAgent___: Set the custom WebView's user-agent.
@@ -136,7 +137,7 @@ class InAppWebView extends StatefulWidget {
   ///Initial headers that will be used.
   final Map<String, String> initialHeaders;
   ///Initial options that will be used.
-  final Map<String, dynamic> initialOptions;
+  final List<WebViewOptions> initialOptions;
   /// `gestureRecognizers` specifies which gestures should be consumed by the web view.
   /// It is possible for other gesture recognizers to be competing with the web view on pointer
   /// events, e.g if the web view is inside a [ListView] the [ListView] will want to handle
@@ -152,7 +153,7 @@ class InAppWebView extends StatefulWidget {
     this.initialFile,
     this.initialData,
     this.initialHeaders = const {},
-    this.initialOptions = const {},
+    this.initialOptions = const [],
     this.onWebViewCreated,
     this.onLoadStart,
     this.onLoadStop,
@@ -187,6 +188,11 @@ class _InAppWebViewState extends State<InAppWebView> {
 
   @override
   Widget build(BuildContext context) {
+    Map<String, dynamic> initialOptions = {};
+    widget.initialOptions.forEach((webViewOption) {
+      initialOptions.addAll(webViewOption.toMap());
+    });
+
     if (defaultTargetPlatform == TargetPlatform.android) {
       return GestureDetector(
         onLongPress: () {},
@@ -201,7 +207,7 @@ class _InAppWebViewState extends State<InAppWebView> {
             'initialFile': widget.initialFile,
             'initialData': widget.initialData?.toMap(),
             'initialHeaders': widget.initialHeaders,
-            'initialOptions': widget.initialOptions
+            'initialOptions': initialOptions
           },
           creationParamsCodec: const StandardMessageCodec(),
         ),
@@ -216,7 +222,7 @@ class _InAppWebViewState extends State<InAppWebView> {
           'initialFile': widget.initialFile,
           'initialData': widget.initialData?.toMap(),
           'initialHeaders': widget.initialHeaders,
-          'initialOptions': widget.initialOptions
+          'initialOptions': initialOptions
         },
         creationParamsCodec: const StandardMessageCodec(),
       );
@@ -307,31 +313,17 @@ class InAppWebViewController {
           _inAppBrowser.shouldOverrideUrlLoading(url);
         break;
       case "onLoadResource":
-        Map<dynamic, dynamic> rawResponse = call.arguments["response"];
-        rawResponse = rawResponse.cast<String, dynamic>();
-        Map<dynamic, dynamic> rawRequest = call.arguments["request"];
-        rawRequest = rawRequest.cast<String, dynamic>();
-
-        String urlResponse = rawResponse["url"];
-        Map<dynamic, dynamic> headersResponse = rawResponse["headers"];
-        headersResponse = headersResponse.cast<String, String>();
-        int statusCode = rawResponse["statusCode"];
-        int startTime = rawResponse["startTime"];
-        int duration = rawResponse["duration"];
-        Uint8List data = rawResponse["data"];
-
-        String urlRequest = rawRequest["url"];
-        Map<dynamic, dynamic> headersRequest = rawRequest["headers"];
-        headersRequest = headersResponse.cast<String, String>();
-        String method = rawRequest["method"];
-
-        var response = new WebResourceResponse(urlResponse, headersResponse, statusCode, startTime, duration, data);
-        var request = new WebResourceRequest(urlRequest, headersRequest, method);
+        String initiatorType = call.arguments["initiatorType"];
+        String url = call.arguments["url"];
+        double startTime = call.arguments["startTime"];
+        double duration = call.arguments["duration"];
+
+        var response = new WebResourceResponse(initiatorType, url, startTime, duration);
 
         if (_widget != null && _widget.onLoadResource != null)
-          _widget.onLoadResource(this, response, request);
+          _widget.onLoadResource(this, response);
         else if (_inAppBrowser != null)
-          _inAppBrowser.onLoadResource(response, request);
+          _inAppBrowser.onLoadResource(response);
         break;
       case "onConsoleMessage":
         String sourceURL = call.arguments["sourceURL"];

lib/src/types.dart

@@ -25,41 +25,34 @@ enum ConsoleMessageLevel {
   DEBUG, ERROR, LOG, TIP, WARNING
 }
 
-///Public class representing a resource request of the [InAppBrowser] WebView.
-///It is used by the method [InAppBrowser.onLoadResource()].
-class WebResourceRequest {
-
-  String url;
-  Map<String, String> headers;
-  String method;
-
-  WebResourceRequest(this.url, this.headers, this.method);
-
-}
-
 ///Public class representing a resource response of the [InAppBrowser] WebView.
 ///It is used by the method [InAppBrowser.onLoadResource()].
 class WebResourceResponse {
 
+  ///A string representing the type of resource.
+  String initiatorType;
+  ///Resource URL.
   String url;
-  Map<String, String> headers;
-  int statusCode;
-  int startTime;
-  int duration;
-  Uint8List data;
+  ///Returns the [DOMHighResTimeStamp](https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp) for the time a resource fetch started.
+  double startTime;
+  ///Returns the [DOMHighResTimeStamp](https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp) duration to fetch a resource.
+  double duration;
 
-  WebResourceResponse(this.url, this.headers, this.statusCode, this.startTime, this.duration, this.data);
+  WebResourceResponse(this.initiatorType, this.url, this.startTime, this.duration);
 
 }
 
 ///Public class representing the response returned by the [onLoadResourceCustomScheme()] event of [InAppWebView].
 ///It allows to load a specific resource. The resource data must be encoded to `base64`.
 class CustomSchemeResponse {
+  ///Data enconded to 'base64'.
   String base64data;
+  ///Content-Type of the data, such as `image/png`.
   String contentType;
+  ///Content-Enconding of the data, such as `utf-8`.
   String contentEnconding;
 
-  CustomSchemeResponse(this.base64data, this.contentType, this.contentEnconding);
+  CustomSchemeResponse(this.base64data, this.contentType, {this.contentEnconding = 'utf-8'});
 
   Map<String, dynamic> toJson() {
     return {
@@ -84,6 +77,37 @@ class ConsoleMessage {
   ConsoleMessage(this.sourceURL, this.lineNumber, this.message, this.messageLevel);
 }
 
+///WebHistory class.
+///
+///This class contains a snapshot of the current back/forward list for a WebView.
+class WebHistory {
+  List<WebHistoryItem> _list;
+  ///List of all [WebHistoryItem]s.
+  List<WebHistoryItem> get list => _list;
+  ///Index of the current [WebHistoryItem].
+  int currentIndex;
+
+  WebHistory(this._list, this.currentIndex);
+}
+
+///WebHistoryItem class.
+///
+///A convenience class for accessing fields in an entry in the back/forward list of a WebView. Each WebHistoryItem is a snapshot of the requested history item.
+class WebHistoryItem {
+  ///Original url of this history item.
+  String originalUrl;
+  ///Document title of this history item.
+  String title;
+  ///Url of this history item.
+  String url;
+  ///0-based position index in the back-forward [WebHistory.list].
+  int index;
+  ///Position offset respect to the currentIndex of the back-forward [WebHistory.list].
+  int offset;
+
+  WebHistoryItem(this.originalUrl, this.title, this.url, this.index, this.offset);
+}
+
 typedef onWebViewCreatedCallback = void Function(InAppWebViewController controller);
 typedef onWebViewLoadStartCallback = void Function(InAppWebViewController controller, String url);
 typedef onWebViewLoadStopCallback = void Function(InAppWebViewController controller, String url);
@@ -91,7 +115,7 @@ typedef onWebViewLoadErrorCallback = void Function(InAppWebViewController contro
 typedef onWebViewProgressChangedCallback = void Function(InAppWebViewController controller, int progress);
 typedef onWebViewConsoleMessageCallback = void Function(InAppWebViewController controller, ConsoleMessage consoleMessage);
 typedef shouldOverrideUrlLoadingCallback = void Function(InAppWebViewController controller, String url);
-typedef onWebViewLoadResourceCallback = void Function(InAppWebViewController controller, WebResourceResponse response, WebResourceRequest request);
+typedef onWebViewLoadResourceCallback = void Function(InAppWebViewController controller, WebResourceResponse response);
 typedef onWebViewScrollChangedCallback = void Function(InAppWebViewController controller, int x, int y);
 typedef onDownloadStartCallback = void Function(InAppWebViewController controller, String url);
 typedef onLoadResourceCustomSchemeCallback = Future<CustomSchemeResponse> Function(InAppWebViewController controller, String scheme, String url);

lib/src/web_history.dart

-///WebHistory class.
-///
-///This class contains a snapshot of the current back/forward list for a WebView.
-class WebHistory {
-  List<WebHistoryItem> _list;
-  ///List of all [WebHistoryItem]s.
-  List<WebHistoryItem> get list => _list;
-  ///Index of the current [WebHistoryItem].
-  int currentIndex;
-
-  WebHistory(this._list, this.currentIndex);
-}
-
-///WebHistoryItem class.
-///
-///A convenience class for accessing fields in an entry in the back/forward list of a WebView. Each WebHistoryItem is a snapshot of the requested history item.
-class WebHistoryItem {
-  ///Original url of this history item.
-  String originalUrl;
-  ///Document title of this history item.
-  String title;
-  ///Url of this history item.
-  String url;
-  ///0-based position index in the back-forward [WebHistory.list].
-  int index;
-  ///Position offset respect to the currentIndex of the back-forward [WebHistory.list].
-  int offset;
-
-  WebHistoryItem(this.originalUrl, this.title, this.url, this.index, this.offset);
-}
\ No newline at end of file

lib/src/webview_options.dart

+import 'package:flutter_inappbrowser/src/content_blocker.dart';
+
+class WebViewOptions {
+  Map<String, dynamic> toMap() {
+    return {};
+  }
+}
+
+class InAppWebViewOptions implements WebViewOptions {
+  bool useShouldOverrideUrlLoading;
+  bool useOnLoadResource;
+  bool useOnDownloadStart;
+  bool useOnTargetBlank;
+  bool clearCache;
+  String userAgent;
+  bool javaScriptEnabled;
+  bool javaScriptCanOpenWindowsAutomatically;
+  bool mediaPlaybackRequiresUserGesture;
+  int textZoom;
+  bool verticalScrollBarEnabled;
+  bool horizontalScrollBarEnabled;
+  List<String> resourceCustomSchemes;
+  List<ContentBlocker> contentBlockers;
+
+  InAppWebViewOptions({this.useShouldOverrideUrlLoading = false, this.useOnLoadResource = false, this.useOnDownloadStart = false, this.useOnTargetBlank = false,
+    this.clearCache = false, this.userAgent = "", this.javaScriptEnabled = true, this.javaScriptCanOpenWindowsAutomatically = false,
+    this.mediaPlaybackRequiresUserGesture = true, this.textZoom = 100, this.verticalScrollBarEnabled = true, this.horizontalScrollBarEnabled = true, this.resourceCustomSchemes = const [],
+    this.contentBlockers = const []});
+
+  @override
+  Map<String, dynamic> toMap() {
+    List<Map<String, Map<String, dynamic>>> contentBlockersMapList = [];
+    contentBlockers.forEach((contentBlocker) {
+      contentBlockersMapList.add(contentBlocker.toMap());
+    });
+
+    return {
+      "useShouldOverrideUrlLoading": useShouldOverrideUrlLoading,
+      "useOnLoadResource": useOnLoadResource,
+      "useOnDownloadStart": useOnDownloadStart,
+      "useOnTargetBlank": useOnTargetBlank,
+      "clearCache": clearCache,
+      "userAgent": userAgent,
+      "javaScriptEnabled": javaScriptEnabled,
+      "javaScriptCanOpenWindowsAutomatically": javaScriptCanOpenWindowsAutomatically,
+      "mediaPlaybackRequiresUserGesture": mediaPlaybackRequiresUserGesture,
+      "textZoom": textZoom,
+      "verticalScrollBarEnabled": verticalScrollBarEnabled,
+      "horizontalScrollBarEnabled": horizontalScrollBarEnabled,
+      "resourceCustomSchemes": resourceCustomSchemes,
+      "contentBlockers": contentBlockersMapList,
+    };
+  }
+}
+
+class AndroidInAppWebViewOptions implements WebViewOptions {
+  bool clearSessionCache;
+  bool builtInZoomControls;
+  bool displayZoomControls;
+  bool supportZoom;
+  bool databaseEnabled;
+  bool domStorageEnabled;
+  bool useWideViewPort;
+  bool safeBrowsingEnabled;
+  bool transparentBackground;
+  String mixedContentMode;
+
+  AndroidInAppWebViewOptions({this.clearSessionCache = false, this.builtInZoomControls = false, this.displayZoomControls = false, this.supportZoom = true, this.databaseEnabled = false,
+    this.domStorageEnabled = false, this.useWideViewPort = true, this.safeBrowsingEnabled = true, this.transparentBackground = false, this.mixedContentMode = ""});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "clearSessionCache": clearSessionCache,
+      "builtInZoomControls": builtInZoomControls,
+      "displayZoomControls": displayZoomControls,
+      "supportZoom": supportZoom,
+      "databaseEnabled": databaseEnabled,
+      "domStorageEnabled": domStorageEnabled,
+      "useWideViewPort": useWideViewPort,
+      "safeBrowsingEnabled": safeBrowsingEnabled,
+      "transparentBackground": transparentBackground,
+      "mixedContentMode": mixedContentMode,
+    };
+  }
+}
+
+class iOSInAppWebViewOptions implements WebViewOptions {
+  bool disallowOverScroll;
+  bool enableViewportScale;
+  bool suppressesIncrementalRendering;
+  bool allowsAirPlayForMediaPlayback;
+  bool allowsBackForwardNavigationGestures;
+  bool allowsLinkPreview;
+  bool ignoresViewportScaleLimits;
+  bool allowsInlineMediaPlayback;
+  bool allowsPictureInPictureMediaPlayback;
+  bool transparentBackground;
+
+  iOSInAppWebViewOptions({this.disallowOverScroll = false, this.enableViewportScale = false, this.suppressesIncrementalRendering = false, this.allowsAirPlayForMediaPlayback = true,
+    this.allowsBackForwardNavigationGestures = true, this.allowsLinkPreview = true, this.ignoresViewportScaleLimits = false, this.allowsInlineMediaPlayback = false,
+    this.allowsPictureInPictureMediaPlayback = true, this.transparentBackground = false});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "disallowOverScroll": disallowOverScroll,
+      "enableViewportScale": enableViewportScale,
+      "suppressesIncrementalRendering": suppressesIncrementalRendering,
+      "allowsAirPlayForMediaPlayback": allowsAirPlayForMediaPlayback,
+      "allowsBackForwardNavigationGestures": allowsBackForwardNavigationGestures,
+      "allowsLinkPreview": allowsLinkPreview,
+      "ignoresViewportScaleLimits": ignoresViewportScaleLimits,
+      "allowsInlineMediaPlayback": allowsInlineMediaPlayback,
+      "allowsPictureInPictureMediaPlayback": allowsPictureInPictureMediaPlayback,
+      "transparentBackground": transparentBackground,
+    };
+  }
+}
+
+class InAppBrowserOptions implements WebViewOptions {
+  bool hidden;
+  bool toolbarTop;
+  String toolbarTopBackgroundColor;
+  String toolbarTopFixedTitle;
+  bool hideUrlBar;
+
+  InAppBrowserOptions({this.hidden = false, this.toolbarTop = true, this.toolbarTopBackgroundColor = "", this.toolbarTopFixedTitle = "", this.hideUrlBar = false});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "hidden": hidden,
+      "toolbarTop": toolbarTop,
+      "toolbarTopBackgroundColor": toolbarTopBackgroundColor,
+      "toolbarTopFixedTitle": toolbarTopFixedTitle,
+      "hideUrlBar": hideUrlBar,
+    };
+  }
+}
+
+class AndroidInAppBrowserOptions implements WebViewOptions {
+  bool hideTitleBar;
+  bool closeOnCannotGoBack;
+  bool progressBar;
+
+  AndroidInAppBrowserOptions({this.hideTitleBar = true, this.closeOnCannotGoBack = true, this.progressBar = true});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "hideTitleBar": hideTitleBar,
+      "closeOnCannotGoBack": closeOnCannotGoBack,
+      "progressBar": progressBar,
+    };
+  }
+}
+
+class iOSInAppBrowserOptions implements WebViewOptions {
+  bool toolbarBottom;
+  String toolbarBottomBackgroundColor;
+  bool toolbarBottomTranslucent;
+  String closeButtonCaption;
+  String closeButtonColor;
+  int presentationStyle; //default fullscreen
+  int transitionStyle; //default crossDissolve
+  bool spinner;
+
+  iOSInAppBrowserOptions({this.toolbarBottom = true, this.toolbarBottomBackgroundColor = "", this.toolbarBottomTranslucent = true, this.closeButtonCaption = "",
+    this.closeButtonColor = "", this.presentationStyle = 0, this.transitionStyle = 0, this.spinner = true});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "toolbarBottom": toolbarBottom,
+      "toolbarBottomBackgroundColor": toolbarBottomBackgroundColor,
+      "toolbarBottomTranslucent": toolbarBottomTranslucent,
+      "closeButtonCaption": closeButtonCaption,
+      "closeButtonColor": closeButtonColor,
+      "presentationStyle": presentationStyle,
+      "transitionStyle": transitionStyle,
+      "spinner": spinner,
+    };
+  }
+}
+
+class AndroidChromeCustomTabsOptions implements WebViewOptions {
+  bool addShareButton;
+  bool showTitle;
+  String toolbarBackgroundColor;
+  bool enableUrlBarHiding;
+  bool instantAppsEnabled;
+
+  AndroidChromeCustomTabsOptions({this.addShareButton = true, this.showTitle = true, this.toolbarBackgroundColor = "", this.enableUrlBarHiding = false, this.instantAppsEnabled = false});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "addShareButton": addShareButton,
+      "showTitle": showTitle,
+      "toolbarBackgroundColor": toolbarBackgroundColor,
+      "enableUrlBarHiding": enableUrlBarHiding,
+      "instantAppsEnabled": instantAppsEnabled,
+    };
+  }
+}
+
+class iOSChromeCustomTabsOptions implements WebViewOptions {
+  bool entersReaderIfAvailable;
+  bool barCollapsingEnabled;
+  int dismissButtonStyle; //default done
+  String preferredBarTintColor;
+  String preferredControlTintColor;
+  int presentationStyle; //default fullscreen
+  int transitionStyle; //default crossDissolve
+
+  iOSChromeCustomTabsOptions({this.entersReaderIfAvailable = false, this.barCollapsingEnabled = false, this.dismissButtonStyle = 0, this.preferredBarTintColor = "",
+    this.preferredControlTintColor = "", this.presentationStyle = 0, this.transitionStyle = 0});
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      "entersReaderIfAvailable": entersReaderIfAvailable,
+      "barCollapsingEnabled": barCollapsingEnabled,
+      "dismissButtonStyle": dismissButtonStyle,
+      "preferredBarTintColor": preferredBarTintColor,
+      "preferredControlTintColor": preferredControlTintColor,
+      "presentationStyle": presentationStyle,
+      "transitionStyle": transitionStyle,
+    };
+  }
+}
\ No newline at end of file