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.impl.client;
29
30 import org.apache.http.Header;
31 import org.apache.http.HttpHeaders;
32 import org.apache.http.HttpRequest;
33 import org.apache.http.HttpResponse;
34 import org.apache.http.TokenIterator;
35 import org.apache.http.impl.DefaultConnectionReuseStrategy;
36 import org.apache.http.message.BasicHeaderIterator;
37 import org.apache.http.message.BasicTokenIterator;
38 import org.apache.http.protocol.HTTP;
39 import org.apache.http.protocol.HttpContext;
40 import org.apache.http.protocol.HttpCoreContext;
41
42 public class DefaultClientConnectionReuseStrategy extends DefaultConnectionReuseStrategy {
43
44 public static final DefaultClientConnectionReuseStrategy INSTANCE = new DefaultClientConnectionReuseStrategy();
45
46 @Override
47 public boolean keepAlive(final HttpResponse response, final HttpContext context) {
48
49 final HttpRequest request = (HttpRequest) context.getAttribute(HttpCoreContext.HTTP_REQUEST);
50 if (request != null) {
51 final Header[] connHeaders = request.getHeaders(HttpHeaders.CONNECTION);
52 if (connHeaders.length != 0) {
53 final TokenIterator ti = new BasicTokenIterator(new BasicHeaderIterator(connHeaders, null));
54 while (ti.hasNext()) {
55 final String token = ti.nextToken();
56 if (HTTP.CONN_CLOSE.equalsIgnoreCase(token)) {
57 return false;
58 }
59 }
60 }
61 }
62 return super.keepAlive(response, context);
63 }
64
65 }
66