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.client.protocol;
29
30 import java.io.IOException;
31 import java.util.Collection;
32
33 import org.apache.http.Header;
34 import org.apache.http.HttpException;
35 import org.apache.http.HttpRequest;
36 import org.apache.http.HttpRequestInterceptor;
37 import org.apache.http.annotation.Contract;
38 import org.apache.http.annotation.ThreadingBehavior;
39 import org.apache.http.client.params.ClientPNames;
40 import org.apache.http.protocol.HttpContext;
41 import org.apache.http.util.Args;
42
43 /**
44 * Request interceptor that adds default request headers.
45 *
46 * @since 4.0
47 */
48 @SuppressWarnings("deprecation")
49 @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
50 public class RequestDefaultHeaders implements HttpRequestInterceptor {
51
52 private final Collection<? extends Header> defaultHeaders;
53
54 /**
55 * @since 4.3
56 */
57 public RequestDefaultHeaders(final Collection<? extends Header> defaultHeaders) {
58 super();
59 this.defaultHeaders = defaultHeaders;
60 }
61
62 public RequestDefaultHeaders() {
63 this(null);
64 }
65
66 @Override
67 public void process(final HttpRequest request, final HttpContext context)
68 throws HttpException, IOException {
69 Args.notNull(request, "HTTP request");
70
71 final String method = request.getRequestLine().getMethod();
72 if (method.equalsIgnoreCase("CONNECT")) {
73 return;
74 }
75
76 // Add default headers
77 @SuppressWarnings("unchecked")
78 Collection<? extends Header> defHeaders = (Collection<? extends Header>)
79 request.getParams().getParameter(ClientPNames.DEFAULT_HEADERS);
80 if (defHeaders == null) {
81 defHeaders = this.defaultHeaders;
82 }
83
84 if (defHeaders != null) {
85 for (final Header defHeader : defHeaders) {
86 request.addHeader(defHeader);
87 }
88 }
89 }
90
91 }
92