|
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 ch.boye.httpclientandroidlib.protocol; |
|
29 |
|
30 import java.io.IOException; |
|
31 |
|
32 import ch.boye.httpclientandroidlib.HttpException; |
|
33 import ch.boye.httpclientandroidlib.HttpRequest; |
|
34 import ch.boye.httpclientandroidlib.HttpRequestInterceptor; |
|
35 |
|
36 /** |
|
37 * RequestConnControl is responsible for adding <code>Connection</code> header |
|
38 * to the outgoing requests, which is essential for managing persistence of |
|
39 * <code>HTTP/1.0</code> connections. This interceptor is recommended for |
|
40 * client side protocol processors. |
|
41 * |
|
42 * @since 4.0 |
|
43 */ |
|
44 public class RequestConnControl implements HttpRequestInterceptor { |
|
45 |
|
46 public RequestConnControl() { |
|
47 super(); |
|
48 } |
|
49 |
|
50 public void process(final HttpRequest request, final HttpContext context) |
|
51 throws HttpException, IOException { |
|
52 if (request == null) { |
|
53 throw new IllegalArgumentException("HTTP request may not be null"); |
|
54 } |
|
55 |
|
56 String method = request.getRequestLine().getMethod(); |
|
57 if (method.equalsIgnoreCase("CONNECT")) { |
|
58 return; |
|
59 } |
|
60 |
|
61 if (!request.containsHeader(HTTP.CONN_DIRECTIVE)) { |
|
62 // Default policy is to keep connection alive |
|
63 // whenever possible |
|
64 request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE); |
|
65 } |
|
66 } |
|
67 |
|
68 } |