The Tor Browser / file revision

 /*

  * ====================================================================

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  * ====================================================================

  *

  * This software consists of voluntary contributions made by many

  * individuals on behalf of the Apache Software Foundation.  For more

  * information on the Apache Software Foundation, please see

  * <http://www.apache.org/>.

  *

  */

 package ch.boye.httpclientandroidlib.conn;

 import java.io.IOException;

 import java.net.InetAddress;

 import java.net.InetSocketAddress;

 import java.net.Socket;

 import java.net.SocketTimeoutException;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 import java.util.Arrays;

 import ch.boye.httpclientandroidlib.annotation.Immutable;

 import ch.boye.httpclientandroidlib.conn.scheme.SchemeSocketFactory;

 import ch.boye.httpclientandroidlib.conn.scheme.SocketFactory;

 import ch.boye.httpclientandroidlib.params.HttpConnectionParams;

 import ch.boye.httpclientandroidlib.params.HttpParams;

 /**

  * Socket factory that implements a simple multi-home fail-over on connect failure,

  * provided the same hostname resolves to multiple {@link InetAddress}es. Please note

  * the {@link #connectSocket(Socket, String, int, InetAddress, int, HttpParams)}

  * method cannot be reliably interrupted by closing the socket returned by the

  * {@link #createSocket()} method.

  *

  * @since 4.0

  *

  * @deprecated Do not use. For multihome support socket factories must implement

  * {@link SchemeSocketFactory} interface.

  */

 @Deprecated

 @Immutable

 public final class MultihomePlainSocketFactory implements SocketFactory {

     /**

      * The factory singleton.

      */

     private static final

     MultihomePlainSocketFactory DEFAULT_FACTORY = new MultihomePlainSocketFactory();

     /**

      * Gets the singleton instance of this class.

      * @return the one and only plain socket factory

      */

     public static MultihomePlainSocketFactory getSocketFactory() {

         return DEFAULT_FACTORY;

     }

     /**

      * Restricted default constructor.

      */

     private MultihomePlainSocketFactory() {

         super();

     }

     // non-javadoc, see interface ch.boye.httpclientandroidlib.conn.SocketFactory

     public Socket createSocket() {

         return new Socket();

     }

     /**

      * Attempts to connects the socket to any of the {@link InetAddress}es the

      * given host name resolves to. If connection to all addresses fail, the

      * last I/O exception is propagated to the caller.

      *

      * @param sock socket to connect to any of the given addresses

      * @param host Host name to connect to

      * @param port the port to connect to

      * @param localAddress local address

      * @param localPort local port

      * @param params HTTP parameters

      *

      * @throws  IOException if an error occurs during the connection

      * @throws  SocketTimeoutException if timeout expires before connecting

      */

     public Socket connectSocket(Socket sock, String host, int port,

                                 InetAddress localAddress, int localPort,

                                 HttpParams params)

         throws IOException {

         if (host == null) {

             throw new IllegalArgumentException("Target host may not be null.");

         }

         if (params == null) {

             throw new IllegalArgumentException("Parameters may not be null.");

         }

         if (sock == null)

             sock = createSocket();

         if ((localAddress != null) || (localPort > 0)) {

             // we need to bind explicitly

             if (localPort < 0)

                 localPort = 0; // indicates "any"

             InetSocketAddress isa =

                 new InetSocketAddress(localAddress, localPort);

             sock.bind(isa);

         }

         int timeout = HttpConnectionParams.getConnectionTimeout(params);

         InetAddress[] inetadrs = InetAddress.getAllByName(host);

         List<InetAddress> addresses = new ArrayList<InetAddress>(inetadrs.length);

         addresses.addAll(Arrays.asList(inetadrs));

         Collections.shuffle(addresses);

         IOException lastEx = null;

         for (InetAddress remoteAddress: addresses) {

             try {

                 sock.connect(new InetSocketAddress(remoteAddress, port), timeout);

                 break;

             } catch (SocketTimeoutException ex) {

                 throw new ConnectTimeoutException("Connect to " + remoteAddress + " timed out");

             } catch (IOException ex) {

                 // create new socket

                 sock = new Socket();

                 // keep the last exception and retry

                 lastEx = ex;

             }

         }

         if (lastEx != null) {

             throw lastEx;

         }

         return sock;

     } // connectSocket

     /**

      * Checks whether a socket connection is secure.

      * This factory creates plain socket connections

      * which are not considered secure.

      *

      * @param sock      the connected socket

      *

      * @return  <code>false</code>

      *

      * @throws IllegalArgumentException if the argument is invalid

      */

     public final boolean isSecure(Socket sock)

         throws IllegalArgumentException {

         if (sock == null) {

             throw new IllegalArgumentException("Socket may not be null.");

         }

         // This class check assumes that createSocket() calls the constructor

         // directly. If it was using javax.net.SocketFactory, we couldn't make

         // an assumption about the socket class here.

         if (sock.getClass() != Socket.class) {

             throw new IllegalArgumentException

                 ("Socket not created by this factory.");

         }

         // This check is performed last since it calls a method implemented

         // by the argument object. getClass() is final in java.lang.Object.

         if (sock.isClosed()) {

             throw new IllegalArgumentException("Socket is closed.");

         }

         return false;

     } // isSecure

 }