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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.mina.http;
21  
22  import java.nio.ByteBuffer;
23  import java.nio.charset.Charset;
24  import java.nio.charset.CharsetEncoder;
25  import java.util.Map;
26  
27  import org.apache.mina.core.buffer.IoBuffer;
28  import org.apache.mina.core.session.IoSession;
29  import org.apache.mina.filter.codec.ProtocolEncoder;
30  import org.apache.mina.filter.codec.ProtocolEncoderOutput;
31  import org.apache.mina.http.api.HttpEndOfContent;
32  import org.apache.mina.http.api.HttpResponse;
33  import org.slf4j.Logger;
34  import org.slf4j.LoggerFactory;
35  
36  public class HttpServerEncoder implements ProtocolEncoder {
37      private static final Logger LOG = LoggerFactory.getLogger(HttpServerCodec.class);
38      private static final CharsetEncoder ENCODER = Charset.forName("UTF-8").newEncoder();
39  
40      public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
41      	LOG.debug("encode {}", message.getClass().getCanonicalName());
42          if (message instanceof HttpResponse) {
43          	LOG.debug("HttpResponse");
44              HttpResponse msg = (HttpResponse) message;
45              StringBuilder sb = new StringBuilder(msg.getStatus().line());
46  
47              for (Map.Entry<String, String> header : msg.getHeaders().entrySet()) {
48                  sb.append(header.getKey());
49                  sb.append(": ");
50                  sb.append(header.getValue());
51                  sb.append("\r\n");
52              }
53              sb.append("\r\n");
54              // Java 6 >> byte[] bytes = sb.toString().getBytes(Charset.forName("UTF-8"));
55              // byte[] bytes = sb.toString().getBytes();
56              // out.write(ByteBuffer.wrap(bytes));
57              IoBuffer buf = IoBuffer.allocate(sb.length()).setAutoExpand(true);
58              buf.putString(sb.toString(), ENCODER);
59              buf.flip();
60              out.write(buf);
61          } else if (message instanceof ByteBuffer) {
62          	LOG.debug("Body {}", message);
63          	out.write(message);
64          } else if (message instanceof HttpEndOfContent) {
65          	LOG.debug("End of Content");
66              // end of HTTP content
67              // keep alive ?
68          }
69  
70      }
71  
72      public void dispose(IoSession session) throws Exception {
73          // TODO Auto-generated method stub
74      }
75  }