Issue 4399 - Add WebView inheritor with ad blocking

libadblockplus-android/src/org/adblockplus/android/AndroidWebRequest.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.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.util.HashSet;
-import java.util.List;
-
-import org.adblockplus.libadblockplus.AdblockPlusException;
-import org.adblockplus.libadblockplus.FilterEngine;
-import org.adblockplus.libadblockplus.HeaderEntry;
-import org.adblockplus.libadblockplus.ServerResponse;
-import org.adblockplus.libadblockplus.ServerResponse.NsStatus;
-import org.adblockplus.libadblockplus.WebRequest;
-
-import android.util.Log;
-
-public class AndroidWebRequest extends WebRequest
-{
-  public final static String TAG = Utils.getTag(WebRequest.class);
-
-  private final HashSet<String> subscriptionURLs = new HashSet<String>();
-  private final boolean elemhideEnabled;
-
-  public AndroidWebRequest(boolean enableElemhide)
-  {
-    this.elemhideEnabled = enableElemhide;
-  }
-
-  public AndroidWebRequest()
-  {
-    this(false);
-  }
-
-  private boolean isListedSubscriptionUrl(final URL url)
-  {
-    String toCheck = url.toString();
-
-    final int idx = toCheck.indexOf('?');
-    if (idx != -1)
-    {
-      toCheck = toCheck.substring(0, idx);
-    }
-
-    return this.subscriptionURLs.contains(toCheck);
-  }
-
-  protected void updateSubscriptionURLs(final FilterEngine engine)
-  {
-    for (final org.adblockplus.libadblockplus.Subscription s : engine.fetchAvailableSubscriptions())
-    {
-      this.subscriptionURLs.add(s.getProperty("url").toString());
-    }
-    this.subscriptionURLs.add(engine.getPref("subscriptions_exceptionsurl").toString());
-  }
-
-  @Override
-  public ServerResponse httpGET(final String urlStr, final List<HeaderEntry> headers)
-  {
-    try
-    {
-      final URL url = new URL(urlStr);
-      Log.d(TAG, "Downloading from: " + url);
-
-      final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
-      connection.setRequestMethod("GET");
-      connection.connect();
-
-      final ServerResponse response = new ServerResponse();
-      response.setResponseStatus(connection.getResponseCode());
-
-      if (response.getResponseStatus() == 200)
-      {
-        final BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
-        final StringBuilder sb = new StringBuilder();
-
-        if (!this.elemhideEnabled && isListedSubscriptionUrl(url))
-        {
-          Log.d(TAG, "Removing element hiding rules from: '" + url + "'");
-
-          String line;
-          while ((line = reader.readLine()) != null)
-          {
-            // We're only appending non-element-hiding filters here.
-            //
-            // See:
-            //      https://issues.adblockplus.org/ticket/303
-            //
-            // Follow-up issue for removing this hack:
-            //      https://issues.adblockplus.org/ticket/1541
-            //
-            if (line.indexOf('#') == -1)
-            {
-              sb.append(line);
-              sb.append('\n');
-            }
-          }
-        }
-        else
-        {
-          int character;
-
-          while ((character = reader.read()) != -1)
-          {
-            sb.append((char) character);
-          }
-        }
-
-        connection.disconnect();
-
-        response.setStatus(NsStatus.OK);
-        response.setResponse(sb.toString());
-      }
-      else
-      {
-        response.setStatus(NsStatus.ERROR_FAILURE);
-      }
-      return response;
-    }
-    catch (final Throwable t)
-    {
-      throw new AdblockPlusException("WebRequest failed", t);
-    }
-  }
-}