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1   /*
2    * Copyright 2012 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 org.jboss.netty.handler.codec.http;
17  
18  import org.jboss.netty.channel.ChannelDownstreamHandler;
19  import org.jboss.netty.channel.ChannelEvent;
20  import org.jboss.netty.channel.ChannelHandlerContext;
21  import org.jboss.netty.channel.ChannelUpstreamHandler;
22  
23  /**
24   * A combination of {@link HttpRequestDecoder} and {@link HttpResponseEncoder}
25   * which enables easier server side HTTP implementation.
26   * @see HttpClientCodec
27   *
28   * @apiviz.has org.jboss.netty.handler.codec.http.HttpRequestDecoder
29   * @apiviz.has org.jboss.netty.handler.codec.http.HttpResponseEncoder
30   */
31  public class HttpServerCodec implements ChannelUpstreamHandler,
32          ChannelDownstreamHandler {
33  
34      private final HttpRequestDecoder decoder;
35      private final HttpResponseEncoder encoder = new HttpResponseEncoder();
36  
37      /**
38       * Creates a new instance with the default decoder options
39       * ({@code maxInitialLineLength (4096}}, {@code maxHeaderSize (8192)}, and
40       * {@code maxChunkSize (8192)}).
41       */
42      public HttpServerCodec() {
43          this(4096, 8192, 8192);
44      }
45  
46      /**
47       * Creates a new instance with the specified decoder options.
48       */
49      public HttpServerCodec(
50              int maxInitialLineLength, int maxHeaderSize, int maxChunkSize) {
51          decoder = new HttpRequestDecoder(maxInitialLineLength, maxHeaderSize, maxChunkSize);
52      }
53  
54      public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e)
55              throws Exception {
56          decoder.handleUpstream(ctx, e);
57      }
58  
59      public void handleDownstream(ChannelHandlerContext ctx, ChannelEvent e)
60              throws Exception {
61          encoder.handleDownstream(ctx, e);
62      }
63  }