1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/RequestContent.java $ 3 * $Revision: 573864 $ 4 * $Date: 2007-09-08 08:53:25 -0700 (Sat, 08 Sep 2007) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.protocol; 33 34 import java.io.IOException; 35 36 import org.apache.http.HttpEntity; 37 import org.apache.http.HttpEntityEnclosingRequest; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpRequest; 40 import org.apache.http.HttpRequestInterceptor; 41 import org.apache.http.HttpVersion; 42 import org.apache.http.ProtocolVersion; 43 import org.apache.http.ProtocolException; 44 45 /** 46 * A request interceptor that decides about the transport encoding. 47 * 48 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 49 * 50 * @version $Revision: 573864 $ 51 * 52 * @since 4.0 53 */ 54 public class RequestContent implements HttpRequestInterceptor { 55 56 public RequestContent() { 57 super(); 58 } 59 60 public void process(final HttpRequest request, final HttpContext context) 61 throws HttpException, IOException { 62 if (request == null) { 63 throw new IllegalArgumentException("HTTP request may not be null"); 64 } 65 if (request instanceof HttpEntityEnclosingRequest) { 66 if (request.containsHeader(HTTP.TRANSFER_ENCODING)) { 67 throw new ProtocolException("Transfer-encoding header already present"); 68 } 69 if (request.containsHeader(HTTP.CONTENT_LEN)) { 70 throw new ProtocolException("Content-Length header already present"); 71 } 72 ProtocolVersion ver = request.getRequestLine().getProtocolVersion(); 73 HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity(); 74 if (entity == null) { 75 request.addHeader(HTTP.CONTENT_LEN, "0"); 76 return; 77 } 78 // Must specify a transfer encoding or a content length 79 if (entity.isChunked() || entity.getContentLength() < 0) { 80 if (ver.lessEquals(HttpVersion.HTTP_1_0)) { 81 throw new ProtocolException( 82 "Chunked transfer encoding not allowed for " + ver); 83 } 84 request.addHeader(HTTP.TRANSFER_ENCODING, HTTP.CHUNK_CODING); 85 } else { 86 request.addHeader(HTTP.CONTENT_LEN, Long.toString(entity.getContentLength())); 87 } 88 // Specify a content type if known 89 if (entity.getContentType() != null && !request.containsHeader( 90 HTTP.CONTENT_TYPE )) { 91 request.addHeader(entity.getContentType()); 92 } 93 // Specify a content encoding if known 94 if (entity.getContentEncoding() != null && !request.containsHeader( 95 HTTP.CONTENT_ENCODING)) { 96 request.addHeader(entity.getContentEncoding()); 97 } 98 } 99 } 100 101 } 102
