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    import javax.servlet.ServletInputStream;
023    import javax.servlet.http.HttpServletRequest;
024    
025    import org.apache.camel.Converter;
026    import org.apache.camel.component.http.helper.GZIPHelper;
027    
028    /**
029     * Some converter methods making it easy to convert the body of a message to servlet types or to switch between
030     * the underlying {@link ServletInputStream} or {@link BufferedReader} payloads etc.
031     *
032     * @version $Revision: 779489 $
033     */
034    @Converter
035    public final class HttpConverter {
036    
037        private HttpConverter() {
038        }
039    
040        @Converter
041        public static HttpServletRequest toServletRequest(HttpMessage message) {
042            if (message == null) {
043                return null;
044            }
045            return message.getRequest();
046        }
047    
048        @Converter
049        public static ServletInputStream toServletInputStream(HttpMessage message) throws IOException {
050            HttpServletRequest request = toServletRequest(message);
051            if (request != null) {
052                return request.getInputStream();
053            }
054            return null;
055        }
056    
057        @Converter
058        public static InputStream toInputStream(HttpMessage message) throws Exception {
059            return toInputStream(toServletRequest(message));
060        }
061    
062        @Converter
063        public static BufferedReader toReader(HttpMessage message) throws IOException {
064            HttpServletRequest request = toServletRequest(message);
065            if (request != null) {
066                return request.getReader();
067            }
068            return null;
069        }
070    
071        @Converter
072        public static InputStream toInputStream(HttpServletRequest request) throws IOException {
073            if (request == null) {
074                return null;
075            }
076            String contentEncoding = request.getHeader(HttpConstants.CONTENT_ENCODING);
077            return GZIPHelper.toGZIPInputStream(contentEncoding, request.getInputStream());
078        }
079    
080    }