1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/RequestTargetHost.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 import java.net.InetAddress; 36 37 import org.apache.http.HttpConnection; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpHost; 40 import org.apache.http.HttpInetConnection; 41 import org.apache.http.HttpRequest; 42 import org.apache.http.HttpRequestInterceptor; 43 import org.apache.http.HttpVersion; 44 import org.apache.http.ProtocolVersion; 45 import org.apache.http.ProtocolException; 46 47 /** 48 * A request interceptor that sets the Host header for HTTP/1.1 requests. 49 * 50 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 51 * 52 * @version $Revision: 573864 $ 53 * 54 * @since 4.0 55 */ 56 public class RequestTargetHost implements HttpRequestInterceptor { 57 58 public RequestTargetHost() { 59 super(); 60 } 61 62 public void process(final HttpRequest request, final HttpContext context) 63 throws HttpException, IOException { 64 if (request == null) { 65 throw new IllegalArgumentException("HTTP request may not be null"); 66 } 67 if (context == null) { 68 throw new IllegalArgumentException("HTTP context may not be null"); 69 } 70 if (!request.containsHeader(HTTP.TARGET_HOST)) { 71 HttpHost targethost = (HttpHost) context 72 .getAttribute(ExecutionContext.HTTP_TARGET_HOST); 73 if (targethost == null) { 74 HttpConnection conn = (HttpConnection) context 75 .getAttribute(ExecutionContext.HTTP_CONNECTION); 76 if (conn instanceof HttpInetConnection) { 77 // Populate the context with a default HTTP host based on the 78 // inet address of the target host 79 InetAddress address = ((HttpInetConnection) conn).getRemoteAddress(); 80 int port = ((HttpInetConnection) conn).getRemotePort(); 81 if (address != null) { 82 targethost = new HttpHost(address.getHostName(), port); 83 } 84 } 85 if (targethost == null) { 86 ProtocolVersion ver = request.getRequestLine().getProtocolVersion(); 87 if (ver.lessEquals(HttpVersion.HTTP_1_0)) { 88 return; 89 } else { 90 throw new ProtocolException("Target host missing"); 91 } 92 } 93 } 94 request.addHeader(HTTP.TARGET_HOST, targethost.toHostString()); 95 } 96 } 97 98 } 99
