Cordova 10 compatibility for Cordova Http Resource Access - Fixes #97

src/android/com/tkyaji/cordova/DecryptCordovaPathHandler.java

@@ -0,0 +1,126 @@
+package com.tkyaji.cordova;
+
+import android.content.res.AssetFileDescriptor;
+import android.content.res.AssetManager;
+import android.net.Uri;
+import android.util.Base64;
+import android.util.Log;
+import android.webkit.MimeTypeMap;
+import android.webkit.WebResourceResponse;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.webkit.WebViewAssetLoader;
+
+import org.apache.cordova.CordovaInterface;
+import org.apache.cordova.CordovaResourceApi;
+import org.apache.cordova.CordovaWebView;
+import org.apache.cordova.LOG;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.regex.Pattern;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+public class DecryptCordovaPathHandler implements WebViewAssetLoader.PathHandler {
+    private static final String TAG = "DecryptResource";
+
+    public CordovaWebView webView;
+    public CordovaInterface cordova;
+
+    private final String[] INCLUDE_FILES;
+    private final String[] EXCLUDE_FILES;
+    private final String CRYPT_KEY;
+    private final String CRYPT_IV;
+
+    public DecryptCordovaPathHandler(CordovaWebView webView,
+                                     CordovaInterface cordova,
+                                     String[] INCLUDE_FILES, String[] EXCLUDE_FILES,
+                                     String CRYPT_KEY, String CRYPT_IV) {
+        this.webView = webView;
+        this.cordova = cordova;
+        this.INCLUDE_FILES = INCLUDE_FILES;
+        this.EXCLUDE_FILES = EXCLUDE_FILES;
+        this.CRYPT_KEY = CRYPT_KEY;
+        this.CRYPT_IV = CRYPT_IV;
+    }
+
+    private boolean isCryptFiles(String uri) {
+        String checkPath = uri.replace("file:///android_asset/www/", "");
+        if (!this.hasMatch(checkPath, INCLUDE_FILES)) {
+            return false;
+        }
+        if (this.hasMatch(checkPath, EXCLUDE_FILES)) {
+            return false;
+        }
+        return true;
+    }
+
+    private boolean hasMatch(String text, String[] regexArr) {
+        for (String regex : regexArr) {
+            if (Pattern.compile(regex).matcher(text).find()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public WebResourceResponse handle(@NonNull String path) {
+        if (path.startsWith("+++/")) {
+            String newPath = "www/" + path.replace("+++/", "").split("\\?")[0];
+
+            try {
+                CordovaResourceApi resourceApi = this.webView.getResourceApi();
+                String mimeType = resourceApi.getMimeType(Uri.parse("file://" + newPath));
+                InputStream is = webView.getContext().getAssets().open(newPath, AssetManager.ACCESS_STREAMING);
+
+                if (!isCryptFiles(path)) {
+                    return new WebResourceResponse(mimeType, null, is);
+                }
+
+                BufferedReader br = new BufferedReader(new InputStreamReader(is));
+                StringBuilder strb = new StringBuilder();
+                String line = null;
+                while ((line = br.readLine()) != null) {
+                    strb.append(line);
+                }
+                br.close();
+
+                byte[] bytes = Base64.decode(strb.toString(), Base64.DEFAULT);
+
+                LOG.d(TAG, "decrypt: " + newPath);
+                ByteArrayInputStream byteInputStream = null;
+                try {
+                    SecretKey skey = new SecretKeySpec(CRYPT_KEY.getBytes("UTF-8"), "AES");
+                    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+                    cipher.init(Cipher.DECRYPT_MODE, skey, new IvParameterSpec(CRYPT_IV.getBytes("UTF-8")));
+
+                    ByteArrayOutputStream bos = new ByteArrayOutputStream();
+                    bos.write(cipher.doFinal(bytes));
+                    byteInputStream = new ByteArrayInputStream(bos.toByteArray());
+                } catch (Exception ex) {
+                    LOG.e(TAG, ex.getMessage());
+                }
+
+                return new WebResourceResponse(mimeType, null, byteInputStream);
+            }
+            catch (IOException e) {
+                Log.e(TAG, e.getLocalizedMessage());
+            }
+        } else {
+            return null;
+        }
+
+        return null;
+    }
+}

src/android/com/tkyaji/cordova/DecryptResource.java

@@ -29,6 +29,14 @@ public class DecryptResource extends CordovaPlugin {
     private static final String[] INCLUDE_FILES = new String[] { };
     private static final String[] EXCLUDE_FILES = new String[] { };
 
+    @Override
+    public CordovaPluginPathHandler getPathHandler() {
+        return new CordovaPluginPathHandler(
+                new DecryptCordovaPathHandler(this.webView, this.cordova,
+                DecryptResource.INCLUDE_FILES, DecryptResource.EXCLUDE_FILES, 
+                    DecryptResource.CRYPT_KEY, DecryptResource.CRYPT_IV));
+    }
+
     @Override
     public Uri remapUri(Uri uri) {
         if (uri.toString().indexOf("/+++/") > -1) {
@@ -79,7 +87,7 @@ public CordovaResourceApi.OpenForReadResult handleOpenForRead(Uri uri) throws IO
     }
 
     private boolean isCryptFiles(String uri) {
-        String checkPath = uri.replace("file:///android_asset/www/", "");
+        String checkPath = uri.replace("file:///android_asset/www/", "").replace("www/", "");
         if (!this.hasMatch(checkPath, INCLUDE_FILES)) {
             return false;
         }