1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/RequestDate.java $ 3 * $Revision: 555989 $ 4 * $Date: 2007-07-13 06:33:39 -0700 (Fri, 13 Jul 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.HttpRequest; 38 import org.apache.http.HttpEntityEnclosingRequest; 39 import org.apache.http.HttpRequestInterceptor; 40 41 /** 42 * A request interceptor that adds a Date header. 43 * For use on the client side. 44 * 45 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 46 * 47 * @version $Revision: 555989 $ 48 * 49 * @since 4.0 50 */ 51 public class RequestDate implements HttpRequestInterceptor { 52 53 private static final HttpDateGenerator DATE_GENERATOR = new HttpDateGenerator(); 54 55 public RequestDate() { 56 super(); 57 } 58 59 public void process(final HttpRequest request, final HttpContext context) 60 throws HttpException, IOException { 61 if (request == null) { 62 throw new IllegalArgumentException 63 ("HTTP request may not be null."); 64 } 65 if ((request instanceof HttpEntityEnclosingRequest) && 66 !request.containsHeader(HTTP.DATE_HEADER)) { 67 String httpdate = DATE_GENERATOR.getCurrentDate(); 68 request.setHeader(HTTP.DATE_HEADER, httpdate); 69 } 70 } 71 72 } 73
