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/*
* Copyright 2012 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.rtsp;
import io.netty.buffer.ByteBuf;
import io.netty.handler.codec.TooLongFrameException;
import io.netty.handler.codec.http.HttpMessage;
import io.netty.handler.codec.http.HttpObjectDecoder;
/**
* Decodes {@link ByteBuf}s into RTSP messages represented in
* {@link HttpMessage}s.
*
*
Parameters that prevents excessive memory consumption
*
*
* Name Meaning
*
*
* {@code maxInitialLineLength}
* The maximum length of the initial line
* (e.g. {@code "SETUP / RTSP/1.0"} or {@code "RTSP/1.0 200 OK"})
* If the length of the initial line exceeds this value, a
* {@link TooLongFrameException} will be raised.
*
*
* {@code maxHeaderSize}
* The maximum length of all headers. If the sum of the length of each
* header exceeds this value, a {@link TooLongFrameException} will be raised.
*
*
* {@code maxContentLength}
* The maximum length of the content. If the content length exceeds this
* value, a {@link TooLongFrameException} will be raised.
*
*
*
* @deprecated Use {@link RtspDecoder} instead.
*/
@Deprecated
public abstract class RtspObjectDecoder extends HttpObjectDecoder {
/**
* Creates a new instance with the default
* {@code maxInitialLineLength (4096)}, {@code maxHeaderSize (8192)}, and
* {@code maxContentLength (8192)}.
*/
protected RtspObjectDecoder() {
this(4096, 8192, 8192);
}
/**
* Creates a new instance with the specified parameters.
*/
protected RtspObjectDecoder(int maxInitialLineLength, int maxHeaderSize, int maxContentLength) {
super(maxInitialLineLength, maxHeaderSize, maxContentLength * 2, false);
}
protected RtspObjectDecoder(
int maxInitialLineLength, int maxHeaderSize, int maxContentLength, boolean validateHeaders) {
super(maxInitialLineLength, maxHeaderSize, maxContentLength * 2, false, validateHeaders);
}
@Override
protected boolean isContentAlwaysEmpty(HttpMessage msg) {
// Unlike HTTP, RTSP always assumes zero-length body if Content-Length
// header is absent.
boolean empty = super.isContentAlwaysEmpty(msg);
if (empty) {
return true;
}
if (!msg.headers().contains(RtspHeaderNames.CONTENT_LENGTH)) {
return true;
}
return empty;
}
}