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    1   /*
    2    * Copyright 2010 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * 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.rtsp;
    17
    18  import org.jboss.netty.buffer.ChannelBuffer;
    19  import org.jboss.netty.handler.codec.frame.TooLongFrameException;
    20  import org.jboss.netty.handler.codec.http.DefaultHttpRequest;
    21  import org.jboss.netty.handler.codec.http.HttpMessage;
    22  import org.jboss.netty.handler.codec.http.HttpRequest;
    23
    24  /**
    25   * Decodes {@link ChannelBuffer}s into RTSP requests represented in
    26   * {@link HttpRequest}s.
    27   * <p>
    28   * <h3>Parameters that prevents excessive memory consumption</h3>
    29   * <table border="1">
    30   * <tr>
    31   * <th>Name</th><th>Meaning</th>
    32   * </tr>
    33   * <tr>
    34   * <td>{@code maxInitialLineLength}</td>
    35   * <td>The maximum length of the initial line (e.g. {@code "SETUP / RTSP/1.0"})
    36   *     If the length of the initial line exceeds this value, a
    37   *     {@link TooLongFrameException} will be raised.</td>
    38   * </tr>
    39   * <tr>
    40   * <td>{@code maxHeaderSize}</td>
    41   * <td>The maximum length of all headers.  If the sum of the length of each
    42   *     header exceeds this value, a {@link TooLongFrameException} will be raised.</td>
    43   * </tr>
    44   * <tr>
    45   * <td>{@code maxContentLength}</td>
    46   * <td>The maximum length of the content.  If the content length exceeds this
    47   *     value, a {@link TooLongFrameException} will be raised.</td>
    48   * </tr>
    49   * </table>
    50   * *
    51   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    52   * @author <a href="http://amitbhayani.blogspot.com/">Amit Bhayani</a>
    53   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    54   * @version $Rev: 2117 $, $Date: 2010-02-01 17:28:17 +0900 (Mon, 01 Feb 2010) $
    55   */
    56  public class RtspRequestDecoder extends RtspMessageDecoder {
    57
    58      /**
    59       * Creates a new instance with the default
    60       * {@code maxInitialLineLength (4096}}, {@code maxHeaderSize (8192)}, and
    61       * {@code maxContentLength (8192)}.
    62       */
    63      public RtspRequestDecoder() {
    64          super();
    65      }
    66
    67      /**
    68       * Creates a new instance with the specified parameters.
    69       */
    70      public RtspRequestDecoder(int maxInitialLineLength, int maxHeaderSize, int maxContentLength) {
    71          super(maxInitialLineLength, maxHeaderSize, maxContentLength);
    72      }
    73
    74      @Override
    75      protected HttpMessage createMessage(String[] initialLine) throws Exception {
    76          return new DefaultHttpRequest(RtspVersions.valueOf(initialLine[2]),
    77                  RtspMethods.valueOf(initialLine[0]), initialLine[1]);
    78      }
    79
    80      @Override
    81      protected boolean isDecodingRequest() {
    82          return true;
    83      }
    84  }