/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/contrib/src/main/java/org/apache/http/contrib/compress/ResponseGzipCompress.java $
* $Revision: 558111 $
* $Date: 2007-07-21 01:31:50 +0530 (Sat, 21 Jul 2007) $
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.synapse.util;
import org.apache.axis2.context.MessageContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.protocol.HTTP;
import org.apache.synapse.transport.passthru.PassThroughConstants;
import java.util.HashMap;
import java.util.Map;
/**
* Process the AcceptEncoding in the received Message Context. This uses the headers in the
* received message context to decide the content encoding that client expects.
*/
public class ResponseAcceptEncodingProcessor {
private static final Log log = LogFactory.getLog(ResponseAcceptEncodingProcessor.class);
private static final String ACCEPT_ENCODING = "Accept-Encoding";
private static final String GZIP_CODEC = "gzip";
public static void process(final MessageContext response, final MessageContext request) {
if (response == null) {
throw new IllegalArgumentException("Response Message Context cannot be null");
}
if (request == null) {
throw new IllegalArgumentException("Request Message context cannot be null");
}
Object o = request.getProperty(MessageContext.TRANSPORT_HEADERS);
if (o != null && o instanceof Map) {
Map headers = (Map) o;
String encode = (String) headers.get(ACCEPT_ENCODING);
if (encode != null) {
//If message contains 'Accept-Encoding' header and if it's value is 'qzip'
if (GZIP_CODEC.equals(encode)) {
Object obj = response.getProperty(MessageContext.TRANSPORT_HEADERS);
Map responseHeaders;
if (obj != null && obj instanceof Map) {
responseHeaders = (Map) obj;
} else {
responseHeaders = new HashMap();
response.setProperty(MessageContext.TRANSPORT_HEADERS, responseHeaders);
}
if (log.isDebugEnabled()) {
log.debug("Sets the 'Content-Encoding' header as ' " + GZIP_CODEC + " '");
}
//WE CAN'T BLINDLY SAY RESPONSE IS IN GZIP IF WE SENT ACCEPT = gzip !!!
//responseHeaders.put(HTTP.CONTENT_ENCODING, GZIP_CODEC);
//Transport sender can decide to enable gzip compression by looking at this property
response.setProperty(PassThroughConstants.REQUEST_ACCEPTS_GZIP,"true");
}
//if there are any type for 'Accept-Encoding' , those should go here
}
}
}
}