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1   /*
2    * Copyright 2013 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.handler.codec.http.websocketx;
17  
18  import io.netty.channel.ChannelFuture;
19  import io.netty.channel.ChannelFutureListener;
20  import io.netty.channel.ChannelHandlerContext;
21  import io.netty.channel.ChannelInboundHandlerAdapter;
22  import io.netty.handler.codec.http.FullHttpResponse;
23  
24  class WebSocketClientProtocolHandshakeHandler extends ChannelInboundHandlerAdapter {
25      private final WebSocketClientHandshaker handshaker;
26  
27      WebSocketClientProtocolHandshakeHandler(WebSocketClientHandshaker handshaker) {
28          this.handshaker = handshaker;
29      }
30  
31      @Override
32      public void channelActive(final ChannelHandlerContext ctx) throws Exception {
33          super.channelActive(ctx);
34          handshaker.handshake(ctx.channel()).addListener(new ChannelFutureListener() {
35              @Override
36              public void operationComplete(ChannelFuture future) throws Exception {
37                  if (!future.isSuccess()) {
38                      ctx.fireExceptionCaught(future.cause());
39                  } else {
40                      ctx.fireUserEventTriggered(
41                              WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_ISSUED);
42                  }
43              }
44          });
45      }
46  
47      @Override
48      public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
49          if (!(msg instanceof FullHttpResponse)) {
50              ctx.fireChannelRead(msg);
51              return;
52          }
53  
54          FullHttpResponse response = (FullHttpResponse) msg;
55          try {
56              if (!handshaker.isHandshakeComplete()) {
57                  handshaker.finishHandshake(ctx.channel(), response);
58                  ctx.fireUserEventTriggered(
59                          WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_COMPLETE);
60                  ctx.pipeline().remove(this);
61                  return;
62              }
63              throw new IllegalStateException("WebSocketClientHandshaker should have been non finished yet");
64          } finally {
65              response.release();
66          }
67      }
68  }