/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly.http;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.filterchain.FilterChainContext;
import org.glassfish.grizzly.http.HttpCodecFilter.ContentParsingState;
/**
* Fixed length transfer encoding implementation.
*
* @see TransferEncoding
*
* @author Alexey Stashok
*/
public final class FixedLengthTransferEncoding implements TransferEncoding {
public FixedLengthTransferEncoding() {
}
/**
* {@inheritDoc}
*/
@Override
public boolean wantDecode(HttpHeader httpPacket) {
final long contentLength = httpPacket.getContentLength();
return (contentLength != -1);
}
/**
* {@inheritDoc}
*/
@Override
public boolean wantEncode(HttpHeader httpPacket) {
final long contentLength = httpPacket.getContentLength();
return (contentLength != -1);
}
@Override
public void prepareSerialize(FilterChainContext ctx,
HttpHeader httpHeader,
HttpContent httpContent) {
final int defaultContentLength = httpContent != null ?
httpContent.getContent().remaining() : -1;
httpHeader.makeContentLengthHeader(defaultContentLength);
}
/**
* {@inheritDoc}
*/
@Override
@SuppressWarnings({"UnusedDeclaration"})
public ParsingResult parsePacket(FilterChainContext ctx,
HttpHeader httpPacket,
Buffer input) {
final HttpPacketParsing httpPacketParsing = (HttpPacketParsing) httpPacket;
// Get HTTP content parsing state
final ContentParsingState contentParsingState =
httpPacketParsing.getContentParsingState();
if (contentParsingState.chunkRemainder == -1) {
// if we have just parsed a HTTP message header
// assign chunkRemainder to the HTTP message content length
contentParsingState.chunkRemainder = httpPacket.getContentLength();
}
Buffer remainder = null;
final long thisPacketRemaining = contentParsingState.chunkRemainder;
final int available = input.remaining();
if (available > thisPacketRemaining) {
// if input Buffer has part of the next HTTP message - slice it
remainder = input.slice(
(int) (input.position() + thisPacketRemaining), input.limit());
input.limit((int) (input.position() + thisPacketRemaining));
}
// recalc. the HTTP message remaining bytes
contentParsingState.chunkRemainder -= input.remaining();
final boolean isLast = (contentParsingState.chunkRemainder == 0);
return ParsingResult.create(httpPacket.httpContentBuilder().content(input)
.last(isLast).build(), remainder);
}
/**
* {@inheritDoc}
*/
@Override
public Buffer serializePacket(FilterChainContext ctx, HttpContent httpContent) {
return httpContent.getContent();
}
}