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1   //========================================================================
2   //Copyright 2006-2007 Mort Bay Consulting Pty. Ltd.
3   //------------------------------------------------------------------------
4   //Licensed under the Apache License, Version 2.0 (the "License");
5   //you may not use this file except in compliance with the License.
6   //You may obtain a copy of the License at
7   //http://www.apache.org/licenses/LICENSE-2.0
8   //Unless required by applicable law or agreed to in writing, software
9   //distributed under the License is distributed on an "AS IS" BASIS,
10  //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11  //See the License for the specific language governing permissions and
12  //limitations under the License.
13  //========================================================================
14  
15  package org.mortbay.jetty.client;
16  
17  import java.io.IOException;
18  import java.nio.channels.SelectionKey;
19  import java.nio.channels.SocketChannel;
20  
21  import javax.net.ssl.SSLContext;
22  import javax.net.ssl.SSLEngine;
23  
24  import org.mortbay.component.AbstractLifeCycle;
25  import org.mortbay.io.Buffer;
26  import org.mortbay.io.Buffers;
27  import org.mortbay.io.Connection;
28  import org.mortbay.io.nio.IndirectNIOBuffer;
29  import org.mortbay.io.nio.SelectChannelEndPoint;
30  import org.mortbay.io.nio.SelectorManager;
31  import org.mortbay.jetty.AbstractBuffers;
32  import org.mortbay.jetty.HttpMethods;
33  import org.mortbay.jetty.HttpVersions;
34  import org.mortbay.jetty.security.SslHttpChannelEndPoint;
35  import org.mortbay.log.Log;
36  
37  class SelectConnector extends AbstractLifeCycle implements HttpClient.Connector, Runnable
38  {
39      private final HttpClient _httpClient;
40      private SSLContext _sslContext;
41      private Buffers _sslBuffers;
42  
43      SelectorManager _selectorManager=new Manager();
44  
45      /**
46       * @param httpClient
47       */
48      SelectConnector(HttpClient httpClient)
49      {
50          _httpClient = httpClient;
51      }
52  
53      protected void doStart() throws Exception
54      {
55          _selectorManager.start();
56          _httpClient._threadPool.dispatch(this);
57      }
58  
59      protected void doStop() throws Exception
60      {
61          _selectorManager.stop();
62      }
63  
64      public void startConnection( HttpDestination destination )
65          throws IOException
66      {
67          SocketChannel channel = SocketChannel.open();
68          Address address = destination.isProxied() ? destination.getProxy() : destination.getAddress();
69          channel.configureBlocking( false );
70          channel.connect(address.toSocketAddress());
71          channel.socket().setSoTimeout( _httpClient.getSoTimeout());
72          _selectorManager.register( channel, destination );
73      }
74  
75      public void run()
76      {
77          while (_httpClient.isRunning())
78          {
79              try
80              {
81                  _selectorManager.doSelect(0);
82              }
83              catch (Exception e)
84              {
85                  e.printStackTrace();
86              }
87          }
88      }
89  
90      class Manager extends SelectorManager
91      {
92          protected SocketChannel acceptChannel(SelectionKey key) throws IOException
93          {
94              throw new IllegalStateException();
95          }
96  
97          public boolean dispatch(Runnable task)
98          {
99              return SelectConnector.this._httpClient._threadPool.dispatch(task);
100         }
101 
102         protected void endPointOpened(SelectChannelEndPoint endpoint)
103         {
104         }
105 
106         protected void endPointClosed(SelectChannelEndPoint endpoint)
107         {
108         }
109 
110         protected Connection newConnection(SocketChannel channel, SelectChannelEndPoint endpoint)
111         {
112             return new HttpConnection(_httpClient,endpoint,SelectConnector.this._httpClient.getHeaderBufferSize(),SelectConnector.this._httpClient.getRequestBufferSize());
113         }
114 
115         protected SelectChannelEndPoint newEndPoint(SocketChannel channel, SelectSet selectSet, SelectionKey key) throws IOException
116         {
117             // key should have destination at this point (will be replaced by endpoint after this call)
118             HttpDestination dest=(HttpDestination)key.attachment();
119 
120 
121             SelectChannelEndPoint ep=null;
122 
123             if (dest.isSecure())
124             {
125                 if (dest.isProxied())
126                 {
127                     String connect = HttpMethods.CONNECT+" "+dest.getAddress()+HttpVersions.HTTP_1_0+"\r\n\r\n";
128                     // TODO need to send this over channel unencrypted and setup endpoint to ignore the 200 OK response.
129 
130                     throw new IllegalStateException("Not Implemented");
131                 }
132 
133                 SSLEngine engine=newSslEngine();
134                 ep = new SslHttpChannelEndPoint(_sslBuffers,channel,selectSet,key,engine);
135             }
136             else
137             {
138                 ep=new SelectChannelEndPoint(channel,selectSet,key);
139             }
140 
141             HttpConnection connection=(HttpConnection)ep.getConnection();
142             connection.setDestination(dest);
143             dest.onNewConnection(connection);
144             return ep;
145         }
146 
147         private synchronized SSLEngine newSslEngine() throws IOException
148         {
149             if (_sslContext==null)
150             {
151                 _sslContext = SelectConnector.this._httpClient.getSSLContext();
152             }
153 
154             SSLEngine sslEngine = _sslContext.createSSLEngine();
155             sslEngine.setUseClientMode(true);
156             sslEngine.beginHandshake();
157 
158             if (_sslBuffers==null)
159             {
160                 AbstractBuffers buffers = new AbstractBuffers()
161                 {
162                     protected Buffer newBuffer( int size )
163                     {
164                         return new IndirectNIOBuffer( size);
165                     }
166                 };
167 
168                 buffers.setRequestBufferSize( sslEngine.getSession().getPacketBufferSize());
169                 buffers.setResponseBufferSize(sslEngine.getSession().getApplicationBufferSize());
170 
171                 try
172                 {
173                     buffers.start();
174                 }
175                 catch(Exception e)
176                 {
177                     throw new IllegalStateException(e);
178                 }
179                 _sslBuffers=buffers;
180             }
181 
182             return sslEngine;
183         }
184 
185         /* ------------------------------------------------------------ */
186         /* (non-Javadoc)
187          * @see org.mortbay.io.nio.SelectorManager#connectionFailed(java.nio.channels.SocketChannel, java.lang.Throwable, java.lang.Object)
188          */
189         protected void connectionFailed(SocketChannel channel, Throwable ex, Object attachment)
190         {
191             if (attachment instanceof HttpDestination)
192                 ((HttpDestination)attachment).onConnectionFailed(ex);
193             else
194                 Log.warn(ex);
195         }
196 
197     }
198 
199 }