001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.component.http;
018    
019    import java.io.BufferedReader;
020    import java.io.IOException;
021    import java.io.InputStream;
022    
023    import javax.servlet.ServletInputStream;
024    import javax.servlet.http.HttpServletRequest;
025    import javax.servlet.http.HttpServletResponse;
026    
027    import org.apache.camel.Converter;
028    import org.apache.camel.Exchange;
029    import org.apache.camel.Message;
030    import org.apache.camel.component.http.helper.GZIPHelper;
031    
032    /**
033     * Some converter methods making it easy to convert the body of a message to servlet types or to switch between
034     * the underlying {@link ServletInputStream} or {@link BufferedReader} payloads etc.
035     *
036     * @version $Revision: 941275 $
037     */
038    @Converter
039    public final class HttpConverter {
040    
041        private HttpConverter() {
042        }
043    
044        @Converter
045        public static HttpServletRequest toServletRequest(Message message) {
046            if (message == null) {
047                return null;
048            }
049            return message.getHeader(Exchange.HTTP_SERVLET_REQUEST, HttpServletRequest.class);
050        }
051    
052        @Converter
053        public static HttpServletResponse toServletResponse(Message message) {
054            if (message == null) {
055                return null;
056            }
057            return message.getHeader(Exchange.HTTP_SERVLET_RESPONSE, HttpServletResponse.class);
058        }
059        
060        
061    
062        @Converter
063        public static ServletInputStream toServletInputStream(HttpMessage message) throws IOException {
064            HttpServletRequest request = toServletRequest(message);
065            if (request != null) {
066                return request.getInputStream();
067            }
068            return null;
069        }
070    
071        @Converter
072        public static InputStream toInputStream(HttpMessage message, Exchange exchange) throws Exception {
073            return toInputStream(toServletRequest(message), exchange);
074        }
075    
076        @Converter
077        public static BufferedReader toReader(HttpMessage message) throws IOException {
078            HttpServletRequest request = toServletRequest(message);
079            if (request != null) {
080                return request.getReader();
081            }
082            return null;
083        }
084    
085        @Converter
086        public static InputStream toInputStream(HttpServletRequest request, Exchange exchange) throws IOException {
087            if (request == null) {
088                return null;
089            }
090            if (exchange == null || !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) {
091                String contentEncoding = request.getHeader(Exchange.CONTENT_ENCODING);
092                return GZIPHelper.uncompressGzip(contentEncoding, request.getInputStream());
093            } else {
094                return request.getInputStream();
095            }
096        }
097    
098    }