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.hc.core5.http2.protocol;
29
30 import java.io.IOException;
31
32 import org.apache.hc.core5.annotation.Contract;
33 import org.apache.hc.core5.annotation.ThreadingBehavior;
34 import org.apache.hc.core5.http.EntityDetails;
35 import org.apache.hc.core5.http.HttpException;
36 import org.apache.hc.core5.http.HttpRequest;
37 import org.apache.hc.core5.http.ProtocolVersion;
38 import org.apache.hc.core5.http.protocol.HttpContext;
39 import org.apache.hc.core5.http.protocol.RequestConnControl;
40 import org.apache.hc.core5.util.Args;
41
42 /**
43 * HTTP/2 compatible extension of {@link RequestConnControl}.
44 * <p>
45 * This interceptor is recommended for the HTTP protocol conformance and
46 * the correct operation of the client-side message processing pipeline.
47 * </p>
48 *
49 * @since 5.0
50 */
51 @Contract(threading = ThreadingBehavior.IMMUTABLE)
52 public class H2RequestConnControl extends RequestConnControl {
53
54 /**
55 * Singleton instance.
56 *
57 * @since 5.2
58 */
59 public static final H2RequestConnControl INSTANCE = new H2RequestConnControl();
60
61 @Override
62 public void process(
63 final HttpRequest request,
64 final EntityDetails entity,
65 final HttpContext context) throws HttpException, IOException {
66 Args.notNull(context, "HTTP context");
67 final ProtocolVersion ver = context.getProtocolVersion();
68 if (ver.getMajor() < 2) {
69 super.process(request, entity, context);
70 }
71 }
72
73 }