1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/ResponseServer.java $ 3 * $Revision: 576073 $ 4 * $Date: 2007-09-16 03:53:13 -0700 (Sun, 16 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.HttpException; 37 import org.apache.http.HttpResponse; 38 import org.apache.http.HttpResponseInterceptor; 39 import org.apache.http.params.CoreProtocolPNames; 40 41 /** 42 * A response interceptor that adds a Server header. 43 * For use on the server side. 44 * 45 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 46 * 47 * @version $Revision: 576073 $ 48 * 49 * @since 4.0 50 */ 51 public class ResponseServer implements HttpResponseInterceptor { 52 53 public ResponseServer() { 54 super(); 55 } 56 57 public void process(final HttpResponse response, final HttpContext context) 58 throws HttpException, IOException { 59 if (response == null) { 60 throw new IllegalArgumentException("HTTP request may not be null"); 61 } 62 if (!response.containsHeader(HTTP.SERVER_HEADER)) { 63 String s = (String) response.getParams().getParameter( 64 CoreProtocolPNames.ORIGIN_SERVER); 65 if (s != null) { 66 response.addHeader(HTTP.SERVER_HEADER, s); 67 } 68 } 69 } 70 71 } 72
