001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.nio.protocol; 029 030import java.io.IOException; 031 032import org.apache.http.HttpException; 033import org.apache.http.protocol.HttpContext; 034 035/** 036 * {@code HttpAsyncExpectationVerifier} defines a strategy to verify whether 037 * or not an incoming HTTP request meets the target server's expectations. 038 *<p> 039 * A server that does not understand or is unable to comply with any of 040 * the expectation values in the Expect field of a request MUST respond 041 * with appropriate error status. The server MUST respond with a 417 042 * (Expectation Failed) status if any of the expectations cannot be met 043 * or, if there are other problems with the request, some other 4xx 044 * status. 045 * 046 * @since 4.2 047 */ 048public interface HttpAsyncExpectationVerifier { 049 050 void verify( 051 HttpAsyncExchange httpExchange, 052 HttpContext context) throws HttpException, IOException; 053 054}