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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 io.netty.handler.codec.rtsp;
17  
18  import io.netty.buffer.ByteBuf;
19  import io.netty.handler.codec.AsciiString;
20  import io.netty.handler.codec.http.FullHttpRequest;
21  import io.netty.handler.codec.http.HttpRequest;
22  import io.netty.util.CharsetUtil;
23  
24  import static io.netty.handler.codec.http.HttpConstants.*;
25  
26  /**
27   * Encodes an RTSP request represented in {@link FullHttpRequest} into
28   * a {@link ByteBuf}.
29  
30   */
31  public class RtspRequestEncoder extends RtspObjectEncoder<HttpRequest> {
32      private static final byte[] CRLF = { CR, LF };
33  
34      @Override
35      public boolean acceptOutboundMessage(Object msg) throws Exception {
36          return msg instanceof FullHttpRequest;
37      }
38  
39      @Override
40      protected void encodeInitialLine(ByteBuf buf, HttpRequest request) throws Exception {
41          AsciiString method = request.method().name();
42          buf.writeBytes(method.array(), method.arrayOffset(), method.length());
43          buf.writeByte(SP);
44  
45          buf.writeBytes(request.uri().getBytes(CharsetUtil.UTF_8));
46          buf.writeByte(SP);
47  
48          AsciiString version = request.protocolVersion().text();
49          buf.writeBytes(version.array(), version.arrayOffset(), version.length());
50          buf.writeBytes(CRLF);
51      }
52  }