2008-11-19 08:22:15 +01:00
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/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005-2008, Red Hat Middleware LLC, and individual contributors
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jboss.netty.handler.codec.http;
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import java.util.List;
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import org.jboss.netty.buffer.ChannelBuffer;
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import org.jboss.netty.buffer.ChannelBuffers;
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import org.jboss.netty.channel.Channel;
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import org.jboss.netty.channel.ChannelHandlerContext;
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2009-06-19 17:35:19 +02:00
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import org.jboss.netty.channel.ChannelPipeline;
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2009-03-10 08:20:27 +01:00
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import org.jboss.netty.handler.codec.frame.TooLongFrameException;
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2008-11-19 08:22:15 +01:00
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import org.jboss.netty.handler.codec.replay.ReplayingDecoder;
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/**
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2009-06-19 17:35:19 +02:00
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* Decodes {@link ChannelBuffer}s into {@link HttpMessage}s and
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* {@link HttpChunk}s.
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*
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* <h3>Parameters that prevents excessive memory consumption</h3>
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* <table>
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* <tr>
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* <th>Name</th><th>Meaning</th>
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* </tr>
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* <tr>
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* <td>{@code maxInitialLineLength}</td>
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* <td>The maximum length of the initial line
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* (e.g. {@code "GET / HTTP/1.0"} or {@code "HTTP/1.0 200 OK"})
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* If the length of the initial line exceeds this value, a
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* {@link TooLongFrameException} will be raised.</td>
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* </tr>
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* <tr>
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* <td>{@code maxHeaderSize}</td>
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* <td>The maximum length of all headers. If the sum of the length of each
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* header exceeds this value, a {@link TooLongFrameException} will be raised.</td>
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* </tr>
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* <tr>
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* <td>{@code maxChunkSize}</td>
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* <td>The maximum length of the content or each chunk. If the content length
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* exceeds this value, the transfer encoding of the decoded message will be
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* converted to 'chunked' and the content will be split into multiple
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* {@link HttpChunk}s. If the transfer encoding of the HTTP message is
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* 'chunked' already, each chunk will be split into smaller chunks if the
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* length of the chunk exceeds this value. If you prefer not to handle
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* {@link HttpChunk}s in your handler, insert {@link HttpChunkAggregator}
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* after this decoder in the {@link ChannelPipeline}.</td>
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* </tr>
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* </table>
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*
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* <h3>Extensibility</h3>
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*
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* Please note that this decoder is designed to be extended to implement
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* a protocol derived from HTTP, such as
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* <a href="http://en.wikipedia.org/wiki/Real_Time_Streaming_Protocol">RTSP</a> and
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* <a href="http://en.wikipedia.org/wiki/Internet_Content_Adaptation_Protocol">ICAP</a>.
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* To implement the decoder of such a derived protocol, extend this class and
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* implement all abstract methods properly.
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2008-11-19 08:22:15 +01:00
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*
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* @author The Netty Project (netty-dev@lists.jboss.org)
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* @author Andy Taylor (andy.taylor@jboss.org)
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* @author Trustin Lee (tlee@redhat.com)
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2008-12-03 10:00:29 +01:00
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* @version $Rev$, $Date$
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2008-11-19 08:22:15 +01:00
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*/
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2008-12-03 10:00:29 +01:00
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public abstract class HttpMessageDecoder extends ReplayingDecoder<HttpMessageDecoder.State> {
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2008-11-19 08:22:15 +01:00
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2009-03-10 08:20:27 +01:00
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private final int maxInitialLineLength;
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private final int maxHeaderSize;
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2009-03-09 09:50:24 +01:00
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private final int maxChunkSize;
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2009-02-12 07:09:29 +01:00
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protected volatile HttpMessage message;
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private volatile ChannelBuffer content;
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2009-05-08 14:45:10 +02:00
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private volatile long chunkSize;
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2009-06-15 10:45:39 +02:00
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private int headerSize;
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2009-02-12 07:09:29 +01:00
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2008-12-03 10:00:29 +01:00
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/**
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2009-06-19 17:35:19 +02:00
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* The internal state of {@link HttpMessageDecoder}.
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* <em>Internal use only</em>.
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*
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2008-12-03 10:00:29 +01:00
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* @author The Netty Project (netty-dev@lists.jboss.org)
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* @author Trustin Lee (tlee@redhat.com)
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* @version $Rev$, $Date$
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*
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* @apiviz.exclude
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*/
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protected enum State {
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2009-02-12 06:02:22 +01:00
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SKIP_CONTROL_CHARS,
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2008-11-19 08:22:15 +01:00
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READ_INITIAL,
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READ_HEADER,
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2009-02-12 08:17:29 +01:00
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READ_VARIABLE_LENGTH_CONTENT,
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2009-03-09 09:50:24 +01:00
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READ_VARIABLE_LENGTH_CONTENT_AS_CHUNKS,
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2008-11-19 08:22:15 +01:00
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READ_FIXED_LENGTH_CONTENT,
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2009-03-09 09:50:24 +01:00
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READ_FIXED_LENGTH_CONTENT_AS_CHUNKS,
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2008-11-19 08:22:15 +01:00
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READ_CHUNK_SIZE,
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READ_CHUNKED_CONTENT,
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2009-03-09 09:50:24 +01:00
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READ_CHUNKED_CONTENT_AS_CHUNKS,
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2009-02-12 06:41:22 +01:00
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READ_CHUNK_DELIMITER,
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READ_CHUNK_FOOTER;
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2008-11-19 08:22:15 +01:00
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}
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2009-06-19 17:35:19 +02:00
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/**
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* Creates a new instance with the default
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* {@code maxInitialLineLength (4096}}, {@code maxHeaderSize (4096)}, and
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* {@code maxChunkSize (4096)}.
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*/
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2009-03-10 09:57:02 +01:00
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protected HttpMessageDecoder() {
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this(4096, 8192, 8192);
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}
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2009-06-19 17:35:19 +02:00
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/**
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* Creates a new instance with the specified parameters.
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*/
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2009-03-10 09:57:02 +01:00
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protected HttpMessageDecoder(
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int maxInitialLineLength, int maxHeaderSize, int maxChunkSize) {
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2009-03-09 09:50:24 +01:00
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super(State.SKIP_CONTROL_CHARS, true);
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2009-03-10 09:57:02 +01:00
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2009-03-10 08:20:27 +01:00
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if (maxInitialLineLength <= 0) {
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throw new IllegalArgumentException(
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"maxInitialLineLength must be a positive integer: " +
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maxInitialLineLength);
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}
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if (maxHeaderSize <= 0) {
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throw new IllegalArgumentException(
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"maxHeaderSize must be a positive integer: " +
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maxChunkSize);
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}
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2009-03-09 09:50:24 +01:00
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if (maxChunkSize < 0) {
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throw new IllegalArgumentException(
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2009-03-10 08:53:15 +01:00
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"maxChunkSize must be a positive integer: " +
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2009-03-09 09:50:24 +01:00
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maxChunkSize);
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}
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2009-03-10 08:20:27 +01:00
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this.maxInitialLineLength = maxInitialLineLength;
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this.maxHeaderSize = maxHeaderSize;
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2009-03-09 09:50:24 +01:00
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this.maxChunkSize = maxChunkSize;
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}
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2008-11-19 08:22:15 +01:00
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@Override
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2008-12-03 10:00:29 +01:00
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protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, State state) throws Exception {
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2008-11-19 08:22:15 +01:00
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switch (state) {
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2009-02-12 06:02:22 +01:00
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case SKIP_CONTROL_CHARS: {
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try {
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skipControlCharacters(buffer);
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checkpoint(State.READ_INITIAL);
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} finally {
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checkpoint();
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}
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}
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2008-11-19 08:22:15 +01:00
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case READ_INITIAL: {
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2009-03-10 08:20:27 +01:00
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String[] initialLine = splitInitialLine(readLine(buffer, maxInitialLineLength));
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if (initialLine.length < 3) {
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// Invalid initial line - ignore.
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checkpoint(State.SKIP_CONTROL_CHARS);
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return null;
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}
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message = createMessage(initialLine);
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checkpoint(State.READ_HEADER);
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2008-11-19 08:22:15 +01:00
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}
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case READ_HEADER: {
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2009-03-04 14:50:19 +01:00
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State nextState = readHeaders(buffer);
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checkpoint(nextState);
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if (nextState == State.READ_CHUNK_SIZE) {
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// Chunked encoding
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2009-03-10 08:53:15 +01:00
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// Generate HttpMessage first. HttpChunks will follow.
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return message;
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2009-03-30 04:14:11 +02:00
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} else if (nextState == State.SKIP_CONTROL_CHARS) {
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// No content is expected.
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2009-03-30 04:19:11 +02:00
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// Remove the headers which are not supposed to be present not
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// to confuse subsequent handlers.
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message.removeHeader(HttpHeaders.Names.CONTENT_LENGTH);
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message.removeHeader(HttpHeaders.Names.TRANSFER_ENCODING);
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2009-03-30 04:14:11 +02:00
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return message;
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2009-02-12 08:32:53 +01:00
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} else {
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2009-05-08 14:45:10 +02:00
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long contentLength = message.getContentLength(-1);
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2009-02-12 08:32:53 +01:00
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if (contentLength == 0 || contentLength == -1 && isDecodingRequest()) {
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content = ChannelBuffers.EMPTY_BUFFER;
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return reset();
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}
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2009-03-09 09:50:24 +01:00
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2009-03-10 08:53:15 +01:00
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switch (nextState) {
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case READ_FIXED_LENGTH_CONTENT:
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if (contentLength > maxChunkSize) {
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2009-03-09 09:50:24 +01:00
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// Generate HttpMessage first. HttpChunks will follow.
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checkpoint(State.READ_FIXED_LENGTH_CONTENT_AS_CHUNKS);
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message.addHeader(HttpHeaders.Names.TRANSFER_ENCODING, HttpHeaders.Values.CHUNKED);
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// chunkSize will be decreased as the READ_FIXED_LENGTH_CONTENT_AS_CHUNKS
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// state reads data chunk by chunk.
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chunkSize = message.getContentLength(-1);
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return message;
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2009-03-10 08:53:15 +01:00
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}
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break;
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case READ_VARIABLE_LENGTH_CONTENT:
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if (buffer.readableBytes() > maxChunkSize) {
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2009-03-09 09:50:24 +01:00
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// Generate HttpMessage first. HttpChunks will follow.
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checkpoint(State.READ_VARIABLE_LENGTH_CONTENT_AS_CHUNKS);
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message.addHeader(HttpHeaders.Names.TRANSFER_ENCODING, HttpHeaders.Values.CHUNKED);
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return message;
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}
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2009-03-10 08:53:15 +01:00
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break;
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2009-03-09 09:50:24 +01:00
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}
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2008-11-30 17:29:35 +01:00
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}
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2009-03-09 09:50:24 +01:00
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// We return null here, this forces decode to be called again where we will decode the content
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2008-11-19 08:22:15 +01:00
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return null;
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}
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2009-02-12 08:17:29 +01:00
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case READ_VARIABLE_LENGTH_CONTENT: {
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2008-11-19 08:22:15 +01:00
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if (content == null) {
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2008-12-08 10:02:33 +01:00
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content = ChannelBuffers.dynamicBuffer(channel.getConfig().getBufferFactory());
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2008-11-19 08:22:15 +01:00
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}
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2009-02-12 08:17:29 +01:00
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//this will cause a replay error until the channel is closed where this will read what's left in the buffer
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2008-11-19 08:22:15 +01:00
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content.writeBytes(buffer.readBytes(buffer.readableBytes()));
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return reset();
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}
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2009-03-09 09:50:24 +01:00
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case READ_VARIABLE_LENGTH_CONTENT_AS_CHUNKS: {
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// Keep reading data as a chunk until the end of connection is reached.
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int chunkSize = Math.min(maxChunkSize, buffer.readableBytes());
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HttpChunk chunk = new DefaultHttpChunk(buffer.readBytes(chunkSize));
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if (!buffer.readable()) {
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// Reached to the end of the connection.
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reset();
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if (!chunk.isLast()) {
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// Append the last chunk.
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2009-06-15 08:33:30 +02:00
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return new Object[] { chunk, HttpChunk.LAST_CHUNK };
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2009-03-09 09:50:24 +01:00
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}
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}
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return chunk;
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}
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2008-11-19 08:22:15 +01:00
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case READ_FIXED_LENGTH_CONTENT: {
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//we have a content-length so we just read the correct number of bytes
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readFixedLengthContent(buffer);
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return reset();
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}
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2009-03-09 09:50:24 +01:00
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case READ_FIXED_LENGTH_CONTENT_AS_CHUNKS: {
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2009-05-08 14:45:10 +02:00
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long chunkSize = this.chunkSize;
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2009-03-09 09:50:24 +01:00
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HttpChunk chunk;
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if (chunkSize > maxChunkSize) {
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chunk = new DefaultHttpChunk(buffer.readBytes(maxChunkSize));
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chunkSize -= maxChunkSize;
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} else {
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2009-05-08 14:45:10 +02:00
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assert chunkSize <= Integer.MAX_VALUE;
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chunk = new DefaultHttpChunk(buffer.readBytes((int) chunkSize));
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2009-03-09 09:50:24 +01:00
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chunkSize = 0;
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}
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this.chunkSize = chunkSize;
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if (chunkSize == 0) {
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// Read all content.
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reset();
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if (!chunk.isLast()) {
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// Append the last chunk.
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2009-06-15 08:33:30 +02:00
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return new Object[] { chunk, HttpChunk.LAST_CHUNK };
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2009-03-09 09:50:24 +01:00
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}
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}
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return chunk;
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}
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2008-11-19 08:22:15 +01:00
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/**
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* everything else after this point takes care of reading chunked content. basically, read chunk size,
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* read chunk, read and ignore the CRLF and repeat until 0
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*/
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case READ_CHUNK_SIZE: {
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2009-03-10 08:20:27 +01:00
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String line = readLine(buffer, maxInitialLineLength);
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2009-03-09 09:50:24 +01:00
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int chunkSize = getChunkSize(line);
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this.chunkSize = chunkSize;
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2008-11-19 08:22:15 +01:00
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if (chunkSize == 0) {
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2009-02-12 06:41:22 +01:00
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checkpoint(State.READ_CHUNK_FOOTER);
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2009-02-26 10:08:34 +01:00
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return null;
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2009-03-10 08:53:15 +01:00
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} else if (chunkSize > maxChunkSize) {
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// A chunk is too large. Split them into multiple chunks again.
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checkpoint(State.READ_CHUNKED_CONTENT_AS_CHUNKS);
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2009-02-12 06:41:22 +01:00
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} else {
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2008-12-03 10:00:29 +01:00
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checkpoint(State.READ_CHUNKED_CONTENT);
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2008-11-19 08:22:15 +01:00
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}
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}
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case READ_CHUNKED_CONTENT: {
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2009-05-08 14:45:10 +02:00
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assert chunkSize <= Integer.MAX_VALUE;
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HttpChunk chunk = new DefaultHttpChunk(buffer.readBytes((int) chunkSize));
|
2009-03-10 08:53:15 +01:00
|
|
|
checkpoint(State.READ_CHUNK_DELIMITER);
|
|
|
|
return chunk;
|
2009-03-09 09:50:24 +01:00
|
|
|
}
|
|
|
|
case READ_CHUNKED_CONTENT_AS_CHUNKS: {
|
2009-05-08 14:45:10 +02:00
|
|
|
long chunkSize = this.chunkSize;
|
2009-03-09 09:50:24 +01:00
|
|
|
HttpChunk chunk;
|
|
|
|
if (chunkSize > maxChunkSize) {
|
|
|
|
chunk = new DefaultHttpChunk(buffer.readBytes(maxChunkSize));
|
|
|
|
chunkSize -= maxChunkSize;
|
2009-02-12 07:09:29 +01:00
|
|
|
} else {
|
2009-05-08 14:45:10 +02:00
|
|
|
assert chunkSize <= Integer.MAX_VALUE;
|
|
|
|
chunk = new DefaultHttpChunk(buffer.readBytes((int) chunkSize));
|
2009-03-09 09:50:24 +01:00
|
|
|
chunkSize = 0;
|
|
|
|
}
|
|
|
|
this.chunkSize = chunkSize;
|
|
|
|
|
|
|
|
if (chunkSize == 0) {
|
|
|
|
// Read all content.
|
2009-02-12 07:09:29 +01:00
|
|
|
checkpoint(State.READ_CHUNK_DELIMITER);
|
2009-03-09 09:50:24 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!chunk.isLast()) {
|
2009-02-12 07:09:29 +01:00
|
|
|
return chunk;
|
|
|
|
}
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
2009-02-12 06:41:22 +01:00
|
|
|
case READ_CHUNK_DELIMITER: {
|
2009-02-12 06:48:25 +01:00
|
|
|
for (;;) {
|
|
|
|
byte next = buffer.readByte();
|
|
|
|
if (next == HttpCodecUtil.CR) {
|
|
|
|
if (buffer.readByte() == HttpCodecUtil.LF) {
|
|
|
|
checkpoint(State.READ_CHUNK_SIZE);
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
} else if (next == HttpCodecUtil.LF) {
|
|
|
|
checkpoint(State.READ_CHUNK_SIZE);
|
|
|
|
return null;
|
|
|
|
}
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
}
|
2009-02-12 06:41:22 +01:00
|
|
|
case READ_CHUNK_FOOTER: {
|
2009-03-10 08:20:27 +01:00
|
|
|
// Skip the footer; does anyone use it?
|
|
|
|
try {
|
|
|
|
if (!skipLine(buffer)) {
|
|
|
|
if (maxChunkSize == 0) {
|
|
|
|
// Chunked encoding disabled.
|
|
|
|
return reset();
|
|
|
|
} else {
|
|
|
|
reset();
|
|
|
|
// The last chunk, which is empty
|
|
|
|
return HttpChunk.LAST_CHUNK;
|
|
|
|
}
|
2009-02-12 07:25:13 +01:00
|
|
|
}
|
2009-03-10 08:20:27 +01:00
|
|
|
} finally {
|
|
|
|
checkpoint();
|
2009-02-12 06:41:22 +01:00
|
|
|
}
|
2009-02-12 07:26:05 +01:00
|
|
|
return null;
|
2009-02-12 06:41:22 +01:00
|
|
|
}
|
2008-11-19 08:22:15 +01:00
|
|
|
default: {
|
|
|
|
throw new Error("Shouldn't reach here.");
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-03-30 04:14:11 +02:00
|
|
|
protected boolean isContentAlwaysEmpty(HttpMessage msg) {
|
|
|
|
if (msg instanceof HttpResponse) {
|
|
|
|
HttpResponse res = (HttpResponse) msg;
|
|
|
|
int code = res.getStatus().getCode();
|
|
|
|
if (code < 200) {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
switch (code) {
|
|
|
|
case 204: case 205: case 304:
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2008-11-19 08:22:15 +01:00
|
|
|
private Object reset() {
|
2009-02-13 09:55:06 +01:00
|
|
|
HttpMessage message = this.message;
|
|
|
|
ChannelBuffer content = this.content;
|
|
|
|
|
2009-03-10 09:37:45 +01:00
|
|
|
if (content != null) {
|
|
|
|
message.setContent(content);
|
|
|
|
this.content = null;
|
|
|
|
}
|
2009-02-13 09:55:06 +01:00
|
|
|
this.message = null;
|
2009-03-10 09:37:45 +01:00
|
|
|
|
2009-02-12 06:02:22 +01:00
|
|
|
checkpoint(State.SKIP_CONTROL_CHARS);
|
2008-11-19 08:22:15 +01:00
|
|
|
return message;
|
|
|
|
}
|
|
|
|
|
2009-02-12 06:02:22 +01:00
|
|
|
private void skipControlCharacters(ChannelBuffer buffer) {
|
|
|
|
for (;;) {
|
|
|
|
char c = (char) buffer.readUnsignedByte();
|
|
|
|
if (!Character.isISOControl(c) &&
|
|
|
|
!Character.isWhitespace(c)) {
|
|
|
|
buffer.readerIndex(buffer.readerIndex() - 1);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-19 08:22:15 +01:00
|
|
|
private void readFixedLengthContent(ChannelBuffer buffer) {
|
2009-05-08 14:45:10 +02:00
|
|
|
long length = message.getContentLength(-1);
|
|
|
|
assert length <= Integer.MAX_VALUE;
|
|
|
|
|
2008-11-19 08:22:15 +01:00
|
|
|
if (content == null) {
|
2009-05-08 14:45:10 +02:00
|
|
|
content = buffer.readBytes((int) length);
|
2008-11-30 17:22:03 +01:00
|
|
|
} else {
|
2009-05-08 14:45:10 +02:00
|
|
|
content.writeBytes(buffer.readBytes((int) length));
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-03-10 08:20:27 +01:00
|
|
|
private State readHeaders(ChannelBuffer buffer) throws TooLongFrameException {
|
2009-06-15 10:45:39 +02:00
|
|
|
headerSize = 0;
|
2009-06-15 10:05:27 +02:00
|
|
|
final HttpMessage message = this.message;
|
2009-03-10 08:20:27 +01:00
|
|
|
String line = readHeader(buffer);
|
2008-11-19 08:22:15 +01:00
|
|
|
String lastHeader = null;
|
2009-06-15 10:05:27 +02:00
|
|
|
if (line.length() != 0) {
|
|
|
|
message.clearHeaders();
|
|
|
|
do {
|
2009-06-15 10:13:52 +02:00
|
|
|
char firstChar = line.charAt(0);
|
|
|
|
if (lastHeader != null && (firstChar == ' ' || firstChar == '\t')) {
|
2009-06-15 10:05:27 +02:00
|
|
|
List<String> current = message.getHeaders(lastHeader);
|
|
|
|
int lastPos = current.size() - 1;
|
|
|
|
String newString = current.get(lastPos) + line.trim();
|
|
|
|
current.set(lastPos, newString);
|
2009-06-15 10:13:52 +02:00
|
|
|
} else {
|
2009-06-15 10:05:27 +02:00
|
|
|
String[] header = splitHeader(line);
|
|
|
|
message.addHeader(header[0], header[1]);
|
|
|
|
lastHeader = header[0];
|
|
|
|
}
|
2009-06-15 10:35:24 +02:00
|
|
|
|
|
|
|
line = readHeader(buffer);
|
2009-06-15 10:05:27 +02:00
|
|
|
} while (line.length() != 0);
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
2008-11-30 17:22:03 +01:00
|
|
|
|
2008-12-03 10:00:29 +01:00
|
|
|
State nextState;
|
2009-03-30 04:14:11 +02:00
|
|
|
|
|
|
|
if (isContentAlwaysEmpty(message)) {
|
|
|
|
nextState = State.SKIP_CONTROL_CHARS;
|
|
|
|
} else if (message.isChunked()) {
|
2008-12-03 10:00:29 +01:00
|
|
|
nextState = State.READ_CHUNK_SIZE;
|
2009-02-12 08:17:29 +01:00
|
|
|
} else if (message.getContentLength(-1) >= 0) {
|
2009-02-12 05:37:48 +01:00
|
|
|
nextState = State.READ_FIXED_LENGTH_CONTENT;
|
|
|
|
} else {
|
2009-02-12 08:17:29 +01:00
|
|
|
nextState = State.READ_VARIABLE_LENGTH_CONTENT;
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
2009-03-04 14:50:19 +01:00
|
|
|
return nextState;
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
|
2009-03-10 08:20:27 +01:00
|
|
|
private String readHeader(ChannelBuffer buffer) throws TooLongFrameException {
|
|
|
|
StringBuilder sb = new StringBuilder(64);
|
|
|
|
int headerSize = this.headerSize;
|
2009-06-15 11:06:56 +02:00
|
|
|
|
|
|
|
loop:
|
|
|
|
for (;;) {
|
|
|
|
char nextByte = (char) buffer.readByte();
|
|
|
|
headerSize ++;
|
|
|
|
|
|
|
|
switch (nextByte) {
|
|
|
|
case HttpCodecUtil.CR:
|
|
|
|
nextByte = (char) buffer.readByte();
|
|
|
|
headerSize ++;
|
2009-03-10 08:20:27 +01:00
|
|
|
if (nextByte == HttpCodecUtil.LF) {
|
2009-06-15 11:06:56 +02:00
|
|
|
break loop;
|
2009-03-10 08:20:27 +01:00
|
|
|
}
|
2009-06-15 11:06:56 +02:00
|
|
|
break;
|
|
|
|
case HttpCodecUtil.LF:
|
|
|
|
break loop;
|
2009-03-10 08:20:27 +01:00
|
|
|
}
|
|
|
|
|
2009-06-15 11:06:56 +02:00
|
|
|
// Abort decoding if the header part is too large.
|
|
|
|
if (headerSize >= maxHeaderSize) {
|
|
|
|
throw new TooLongFrameException(
|
|
|
|
"HTTP header is larger than " +
|
|
|
|
maxHeaderSize + " bytes.");
|
|
|
|
|
2009-03-10 08:20:27 +01:00
|
|
|
}
|
2009-06-15 11:06:56 +02:00
|
|
|
|
|
|
|
sb.append(nextByte);
|
2009-03-10 08:20:27 +01:00
|
|
|
}
|
2009-06-15 11:06:56 +02:00
|
|
|
|
|
|
|
this.headerSize = headerSize;
|
|
|
|
return sb.toString();
|
2009-03-10 08:20:27 +01:00
|
|
|
}
|
|
|
|
|
2009-02-12 08:32:53 +01:00
|
|
|
protected abstract boolean isDecodingRequest();
|
2009-03-10 08:20:27 +01:00
|
|
|
protected abstract HttpMessage createMessage(String[] initialLine) throws Exception;
|
2008-11-19 08:22:15 +01:00
|
|
|
|
|
|
|
private int getChunkSize(String hex) {
|
2009-02-12 06:23:39 +01:00
|
|
|
hex = hex.trim();
|
|
|
|
for (int i = 0; i < hex.length(); i ++) {
|
|
|
|
char c = hex.charAt(i);
|
|
|
|
if (c == ';' || Character.isWhitespace(c) || Character.isISOControl(c)) {
|
|
|
|
hex = hex.substring(0, i);
|
|
|
|
break;
|
|
|
|
}
|
2009-02-12 06:10:25 +01:00
|
|
|
}
|
2009-02-12 06:23:39 +01:00
|
|
|
|
2009-02-12 06:10:25 +01:00
|
|
|
return Integer.parseInt(hex, 16);
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
|
2009-03-10 08:20:27 +01:00
|
|
|
private String readLine(ChannelBuffer buffer, int maxLineLength) throws TooLongFrameException {
|
2009-02-12 06:49:19 +01:00
|
|
|
StringBuilder sb = new StringBuilder(64);
|
2009-03-10 08:20:27 +01:00
|
|
|
int lineLength = 0;
|
2008-11-19 08:22:15 +01:00
|
|
|
while (true) {
|
2009-02-12 06:48:25 +01:00
|
|
|
byte nextByte = buffer.readByte();
|
2008-11-19 08:22:15 +01:00
|
|
|
if (nextByte == HttpCodecUtil.CR) {
|
2009-02-12 06:48:25 +01:00
|
|
|
nextByte = buffer.readByte();
|
2008-11-30 17:22:03 +01:00
|
|
|
if (nextByte == HttpCodecUtil.LF) {
|
|
|
|
return sb.toString();
|
|
|
|
}
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
else if (nextByte == HttpCodecUtil.LF) {
|
|
|
|
return sb.toString();
|
|
|
|
}
|
|
|
|
else {
|
2009-03-10 08:20:27 +01:00
|
|
|
if (lineLength >= maxLineLength) {
|
|
|
|
throw new TooLongFrameException(
|
|
|
|
"An HTTP line is larger than " + maxLineLength +
|
|
|
|
" bytes.");
|
|
|
|
}
|
|
|
|
lineLength ++;
|
2008-11-19 08:22:15 +01:00
|
|
|
sb.append((char) nextByte);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-03-10 08:20:27 +01:00
|
|
|
/**
|
|
|
|
* Returns {@code true} if only if the skipped line was not empty.
|
|
|
|
* Please note that an empty line is also skipped, while {@code} false is
|
|
|
|
* returned.
|
|
|
|
*/
|
|
|
|
private boolean skipLine(ChannelBuffer buffer) {
|
|
|
|
int lineLength = 0;
|
|
|
|
while (true) {
|
|
|
|
byte nextByte = buffer.readByte();
|
|
|
|
if (nextByte == HttpCodecUtil.CR) {
|
|
|
|
nextByte = buffer.readByte();
|
|
|
|
if (nextByte == HttpCodecUtil.LF) {
|
|
|
|
return lineLength != 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if (nextByte == HttpCodecUtil.LF) {
|
|
|
|
return lineLength != 0;
|
|
|
|
}
|
|
|
|
else if (!Character.isWhitespace((char) nextByte)) {
|
|
|
|
lineLength ++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private String[] splitInitialLine(String sb) {
|
2009-06-15 09:30:07 +02:00
|
|
|
int aStart;
|
|
|
|
int aEnd;
|
|
|
|
int bStart;
|
|
|
|
int bEnd;
|
|
|
|
int cStart;
|
|
|
|
int cEnd;
|
|
|
|
|
|
|
|
aStart = findNonWhitespace(sb, 0);
|
|
|
|
aEnd = findWhitespace(sb, aStart);
|
|
|
|
|
|
|
|
bStart = findNonWhitespace(sb, aEnd);
|
|
|
|
bEnd = findWhitespace(sb, bStart);
|
|
|
|
|
|
|
|
cStart = findNonWhitespace(sb, bEnd);
|
|
|
|
cEnd = findEndOfString(sb);
|
|
|
|
|
|
|
|
return new String[] {
|
|
|
|
sb.substring(aStart, aEnd),
|
|
|
|
sb.substring(bStart, bEnd),
|
|
|
|
sb.substring(cStart, cEnd) };
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
private String[] splitHeader(String sb) {
|
2009-06-15 09:30:07 +02:00
|
|
|
int nameStart;
|
|
|
|
int nameEnd;
|
|
|
|
int colonEnd;
|
|
|
|
int valueStart;
|
|
|
|
int valueEnd;
|
|
|
|
|
|
|
|
nameStart = findNonWhitespace(sb, 0);
|
|
|
|
for (nameEnd = nameStart; nameEnd < sb.length(); nameEnd ++) {
|
|
|
|
char ch = sb.charAt(nameEnd);
|
|
|
|
if (ch == ':' || Character.isWhitespace(ch)) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (colonEnd = nameEnd; colonEnd < sb.length(); colonEnd ++) {
|
|
|
|
if (sb.charAt(colonEnd) == ':') {
|
|
|
|
colonEnd ++;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
valueStart = findNonWhitespace(sb, colonEnd);
|
|
|
|
valueEnd = findEndOfString(sb);
|
|
|
|
|
|
|
|
return new String[] {
|
|
|
|
sb.substring(nameStart, nameEnd),
|
|
|
|
sb.substring(valueStart, valueEnd) };
|
|
|
|
}
|
|
|
|
|
|
|
|
private int findNonWhitespace(String sb, int offset) {
|
|
|
|
int result;
|
|
|
|
for (result = offset; result < sb.length(); result ++) {
|
|
|
|
if (!Character.isWhitespace(sb.charAt(result))) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
private int findWhitespace(String sb, int offset) {
|
|
|
|
int result;
|
|
|
|
for (result = offset; result < sb.length(); result ++) {
|
|
|
|
if (Character.isWhitespace(sb.charAt(result))) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
private int findEndOfString(String sb) {
|
|
|
|
int result;
|
|
|
|
for (result = sb.length(); result > 0; result --) {
|
|
|
|
if (!Character.isWhitespace(sb.charAt(result - 1))) {
|
|
|
|
break;
|
|
|
|
}
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
2009-06-15 09:30:07 +02:00
|
|
|
return result;
|
2008-11-19 08:22:15 +01:00
|
|
|
}
|
|
|
|
}
|