1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.http.nio.protocol;
29
30 import java.io.IOException;
31
32 import org.apache.http.HttpException;
33 import org.apache.http.protocol.HttpContext;
34
35 /**
36 * {@code HttpAsyncExpectationVerifier} defines a strategy to verify whether
37 * or not an incoming HTTP request meets the target server's expectations.
38 *<p>
39 * A server that does not understand or is unable to comply with any of
40 * the expectation values in the Expect field of a request MUST respond
41 * with appropriate error status. The server MUST respond with a 417
42 * (Expectation Failed) status if any of the expectations cannot be met
43 * or, if there are other problems with the request, some other 4xx
44 * status.
45 *
46 * @since 4.2
47 */
48 public interface HttpAsyncExpectationVerifier {
49
50 void verify(
51 HttpAsyncExchange httpExchange,
52 HttpContext context) throws HttpException, IOException;
53
54 }