1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/HttpExpectationVerifier.java $ 3 * $Revision: 613298 $ 4 * $Date: 2008-01-18 14:09:22 -0800 (Fri, 18 Jan 2008) $ 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 org.apache.http.HttpException; 35 import org.apache.http.HttpRequest; 36 import org.apache.http.HttpResponse; 37 38 /** 39 * Defines an interface to verify whether an incoming HTTP request meets 40 * the target server's expectations. 41 *<p> 42 * The Expect request-header field is used to indicate that particular 43 * server behaviors are required by the client. 44 *</p> 45 *<pre> 46 * Expect = "Expect" ":" 1#expectation 47 * 48 * expectation = "100-continue" | expectation-extension 49 * expectation-extension = token [ "=" ( token | quoted-string ) 50 * *expect-params ] 51 * expect-params = ";" token [ "=" ( token | quoted-string ) ] 52 *</pre> 53 *<p> 54 * A server that does not understand or is unable to comply with any of 55 * the expectation values in the Expect field of a request MUST respond 56 * with appropriate error status. The server MUST respond with a 417 57 * (Expectation Failed) status if any of the expectations cannot be met 58 * or, if there are other problems with the request, some other 4xx 59 * status. 60 *</p> 61 * 62 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 63 * 64 * @version $Revision: 613298 $ 65 * 66 * @since 4.0 67 */ 68 public interface HttpExpectationVerifier { 69 70 void verify(HttpRequest request, HttpResponse response, HttpContext context) 71 throws HttpException; 72 73 } 74
