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.client5.http.protocol;
29
30 import java.io.IOException;
31 import java.util.Collection;
32
33 import org.apache.hc.core5.annotation.Contract;
34 import org.apache.hc.core5.annotation.ThreadingBehavior;
35 import org.apache.hc.core5.http.EntityDetails;
36 import org.apache.hc.core5.http.Header;
37 import org.apache.hc.core5.http.HttpException;
38 import org.apache.hc.core5.http.HttpRequest;
39 import org.apache.hc.core5.http.HttpRequestInterceptor;
40 import org.apache.hc.core5.http.protocol.HttpContext;
41 import org.apache.hc.core5.util.Args;
42
43 /**
44 * Request interceptor that adds default request headers.
45 *
46 * @since 4.0
47 */
48 @Contract(threading = ThreadingBehavior.STATELESS)
49 public class RequestDefaultHeaders implements HttpRequestInterceptor {
50
51 private final Collection<? extends Header> defaultHeaders;
52
53 /**
54 * @since 4.3
55 */
56 public RequestDefaultHeaders(final Collection<? extends Header> defaultHeaders) {
57 super();
58 this.defaultHeaders = defaultHeaders;
59 }
60
61 public RequestDefaultHeaders() {
62 this(null);
63 }
64
65 @Override
66 public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context)
67 throws HttpException, IOException {
68 Args.notNull(request, "HTTP request");
69
70 final String method = request.getMethod();
71 if (method.equalsIgnoreCase("CONNECT")) {
72 return;
73 }
74
75 if (this.defaultHeaders != null) {
76 for (final Header defHeader : this.defaultHeaders) {
77 if(!request.containsHeader(defHeader.getName())) {
78 request.addHeader(defHeader);
79 }
80 }
81 }
82 }
83
84 }