BB 28125: Prevent non-Necko network connections

    @Override

    protected Void doInBackground(final Void... params) {

      HttpURLConnection urlConnection = null;

      BufferedReader in = null;

      try {

        final URI finalURI =

            new URI(mURL + "&signedRequest=" + URLEncoder.encode(new String(mDrmRequest), "UTF-8"));

        urlConnection = (HttpURLConnection) ProxySelector.openConnectionWithProxy(finalURI);

        urlConnection.setRequestMethod("POST");

        if (DEBUG) Log.d(LOGTAG, "Provisioning, posting url =" + finalURI.toString());

        // Add data

        urlConnection.setRequestProperty("Accept", "*/*");

        urlConnection.setRequestProperty("User-Agent", getCDMUserAgent());

        urlConnection.setRequestProperty("Content-Type", "application/json");

        // Execute HTTP Post Request

        urlConnection.connect();

        final int responseCode = urlConnection.getResponseCode();

        if (responseCode == HttpURLConnection.HTTP_OK) {

          in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), UTF_8));

          String inputLine;

          final StringBuffer response = new StringBuffer();

          while ((inputLine = in.readLine()) != null) {

            response.append(inputLine);

          }

          in.close();

          mResponseBody = String.valueOf(response).getBytes(UTF_8);

          if (DEBUG) Log.d(LOGTAG, "Provisioning, response received.");

          if (mResponseBody != null) Log.d(LOGTAG, "response length=" + mResponseBody.length);

        } else {

          Log.d(LOGTAG, "Provisioning, server returned HTTP error code :" + responseCode);

        }

      } catch (final IOException e) {

        Log.e(LOGTAG, "Got exception during posting provisioning request ...", e);

      } catch (final URISyntaxException e) {

        Log.e(LOGTAG, "Got exception during creating uri ...", e);

      } finally {

        if (urlConnection != null) {

          urlConnection.disconnect();

        }

        try {

          if (in != null) {

            in.close();

          }

        } catch (final IOException e) {

          Log.e(LOGTAG, "Exception during closing in ...", e);

        }

      }

      Log.i(LOGTAG, "This is Tor Browser. Skipping.");

      return null;

    }