Issue 4399 - Add WebView inheritor with ad blocking

libadblockplus-android/src/org/adblockplus/android/Utils.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.adblockplus.android;
 
 import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.List;
 
 import org.adblockplus.libadblockplus.JsValue;
 import org.adblockplus.libadblockplus.Subscription;
 import org.apache.commons.lang.StringUtils;
+import org.json.JSONArray;
 
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 
 public final class Utils
 {
   private Utils()
@@ skipping 37 matching lines @@
       {
         buf.close();
       }
 
     }
     catch (final Exception e)
     {
       // Ignored for now
     }
   }
+
+  public static String stringListToJsonArray(List<String> list)
+  {
+    JSONArray array = new JSONArray();
+
+    if (list != null)
+    {
+      for (String eachString : list)
+      {
+        if (eachString != null)
+        {
+          array.put(eachString);
+        }
+      }
+    }
+
+    return array.toString();
+  }
+
+  /**
+   * Extract domain from URL
+   * @param url valid URL (with scheme)
+   * @return domain
+   * @throws URISyntaxException
+   */
+  public static String getDomain(String url) throws URISyntaxException
+  {
+    URI uri = new URI(url);
+    String domain = uri.getHost();
+    if (domain == null)
+      throw new URISyntaxException(url, "Invalid url");
+    return domain.startsWith("www.") ? domain.substring(4) : domain;
+  }
+
+  public static String readAssetAsString(Context context, String filename) throws IOException
+  {
+    BufferedReader in = null;
+    try {
+      StringBuilder buf = new StringBuilder();
+      InputStream is = context.getAssets().open(filename);
+      in = new BufferedReader(new InputStreamReader(is));
+
+      String str;
+      boolean isFirst = true;
+      while ( (str = in.readLine()) != null ) {
+        if (isFirst)
+          isFirst = false;
+        else
+          buf.append('\n');
+        buf.append(str);
+      }
+      return buf.toString();
+    } finally {
+      if (in != null) {
+        try {
+          in.close();
+        } catch (IOException e) {
+          // ignored
+        }
+      }
+    }
+  }
 }