io.netty.handler.codec.rtsp.RtspObjectDecoder Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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.
*
*
*/
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(RtspHeaders.Names.CONTENT_LENGTH)) {
return true;
}
return empty;
}
}