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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  }