Android proxy implementation

package.json

@@ -5,7 +5,8 @@
   "cordova": {
     "id": "cordova-plugin-webview-proxy",
     "platforms": [
-      "ios"
+      "ios",
+      "android"
     ]
   },
   "repository": {
@@ -18,7 +19,8 @@
     "cordova",
     "webview",
     "wkwebview",
-    "ios"
+    "ios",
+    "android"
   ],
   "scripts": {
     "test": "paramedic.."

plugin.xml

@@ -9,11 +9,12 @@
 	<description>Proxy HTTP(S) requests through native code to make CORS and Cookies work in cordova-ios</description>
     <license>MIT</license>
     <engines>
+        <engine name="cordova-android" version=">=10.0.0" />
         <engine name="cordova-ios" version=">=6.2.0" />
     </engines>
     <repo>https://github.com/GEDYSIntraWare/cordova-plugin-webview-proxy.git</repo>
     <issue>https://github.com/GEDYSIntraWare/cordova-plugin-webview-proxy/issues</issue>
-    <keywords>cordova,webview,wkwebview,ios</keywords>
+    <keywords>cordova,webview,wkwebview,ios,android</keywords>
 
     <js-module src="www/WebviewProxy.js" name="WebviewProxy">
         <clobbers target="WebviewProxy"/>
@@ -29,4 +30,15 @@
         </config-file>
         <source-file src="src/ios/WebviewProxy.m" />
     </platform>
+
+    <platform name="android">
+        <config-file target="config.xml" parent="/*">
+            <feature name="WebviewProxy">
+                <param name="android-package" value="com.gi.cordova.plugin.webviewproxy.WebviewProxy"/>
+                <param name="onload" value="true" />
+            </feature>
+        </config-file>
+        <source-file src="src/android/WebviewProxy.java" target-dir="src/com/gi/cordova/plugin/webviewproxy"/>
+        <framework src="androidx.webkit:webkit:1.3.0" type="gradleReference" />
+  </platform>
 </plugin>

src/android/WebviewProxy.java

@@ -0,0 +1,61 @@
+package com.gi.cordova.plugin.webviewproxy;
+
+import android.util.Log;
+import android.webkit.WebResourceResponse;
+
+import org.apache.cordova.CallbackContext;
+import org.apache.cordova.CordovaInterface;
+import org.apache.cordova.CordovaPlugin;
+import org.apache.cordova.CordovaPluginPathHandler;
+import org.apache.cordova.CordovaWebView;
+import org.json.JSONArray;
+
+import java.io.BufferedInputStream;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.HashMap;
+
+import androidx.webkit.WebViewAssetLoader;
+
+public class WebviewProxy extends CordovaPlugin  {
+
+  public void initialize(CordovaInterface cordova, CordovaWebView webView) {
+    super.initialize(cordova, webView);
+
+    Log.d("WebviewProxy", "Proxy init");
+  }
+
+  public boolean execute(String action, JSONArray args, CallbackContext callbackContext) {
+    return false;
+  }
+
+  public CordovaPluginPathHandler getPathHandler() {
+    WebViewAssetLoader.PathHandler pathHandler = new WebViewAssetLoader.PathHandler() {
+      @Override
+      public WebResourceResponse handle(String path) {
+        if (path.startsWith("_https_proxy_") || path.startsWith("_http_proxy_")) {
+          try {
+            URL url = new URL(path.replace("_https_proxy_", "https://").replace("_http_proxy_", "http://"));
+            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
+            try {
+              InputStream in = new BufferedInputStream(urlConnection.getInputStream());
+              String mimeType = urlConnection.getContentType();
+              return new WebResourceResponse(mimeType, null, in);
+            } finally {
+              //urlConnection.disconnect();
+            }
+          } catch(Exception e) {
+            Log.e("WebviewProxy", e.getMessage());
+          }
+        }
+        return null;
+      }
+    };
+
+    Log.d("WebviewProxy", "Add proxy");
+    return new CordovaPluginPathHandler(pathHandler);
+  }
+
+}
+

www/WebviewProxy.js

@@ -4,16 +4,20 @@ function WebviewProxy() {
 }
 
 WebviewProxy.prototype.convertProxyUrl = function (path) {
-  if (!path || !window.CDV_ASSETS_URL) {
-      return path;
-  }
-  if (path.startsWith('http://')) {
-      return window.CDV_ASSETS_URL + '/_http_proxy_' + encodeURIComponent(path.replace('http://', ''));
-  }
-  if (path.startsWith('https://')) {
-      return window.CDV_ASSETS_URL + '/_https_proxy_' + encodeURIComponent(path.replace('https://', ''));
-  }
-  return path;
+    if (!path) {
+        return path;
+    }
+    if (!window.CDV_ASSETS_URL) {
+        //Android 10.x origin
+        window.CDV_ASSETS_URL = location.origin
+    }
+    if (path.startsWith('http://')) {
+        return window.CDV_ASSETS_URL + '/_http_proxy_' + encodeURIComponent(path.replace('http://', ''));
+    }
+    if (path.startsWith('https://')) {
+        return window.CDV_ASSETS_URL + '/_https_proxy_' + encodeURIComponent(path.replace('https://', ''));
+    }
+    return path;
 }
 
 module.exports = new WebviewProxy();