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.annotation.Immutable;
34
35 import org.apache.http.Header;
36 import org.apache.http.HttpException;
37 import org.apache.http.HttpRequest;
38 import org.apache.http.HttpRequestInterceptor;
39 import org.apache.http.client.params.ClientPNames;
40 import org.apache.http.protocol.HttpContext;
41
42 /**
43 * Request interceptor that adds default request headers.
44 *
45 * @since 4.0
46 */
47 @Immutable
48 public class RequestDefaultHeaders implements HttpRequestInterceptor {
49
50 public RequestDefaultHeaders() {
51 super();
52 }
53
54 public void process(final HttpRequest request, final HttpContext context)
55 throws HttpException, IOException {
56 if (request == null) {
57 throw new IllegalArgumentException("HTTP request may not be null");
58 }
59
60 String method = request.getRequestLine().getMethod();
61 if (method.equalsIgnoreCase("CONNECT")) {
62 return;
63 }
64
65 // Add default headers
66 @SuppressWarnings("unchecked")
67 Collection<Header> defHeaders = (Collection<Header>) request.getParams().getParameter(
68 ClientPNames.DEFAULT_HEADERS);
69
70 if (defHeaders != null) {
71 for (Header defHeader : defHeaders) {
72 request.addHeader(defHeader);
73 }
74 }
75 }
76
77 }