1 /* 2 * $HeadURL: $ 3 * $Revision: $ 4 * $Date: $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 package org.apache.http.impl.client; 32 33 import org.apache.http.HeaderElement; 34 import org.apache.http.HeaderElementIterator; 35 import org.apache.http.HttpResponse; 36 import org.apache.http.conn.ConnectionKeepAliveStrategy; 37 import org.apache.http.message.BasicHeaderElementIterator; 38 import org.apache.http.protocol.HTTP; 39 import org.apache.http.protocol.HttpContext; 40 41 /** 42 * Default implementation of a strategy deciding duration 43 * that a connection can remain idle. 44 * 45 * The default implementation looks solely at the 'Keep-Alive' 46 * header's timeout token. 47 * 48 * @author <a href="mailto:sberlin at gmail.com">Sam Berlin</a> 49 * 50 * @version $Revision: $ 51 * 52 * @since 4.0 53 * 54 * @deprecated Please use {@link java.net.URL#openConnection} instead. 55 * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 56 * for further details. 57 */ 58 @Deprecated 59 public class DefaultConnectionKeepAliveStrategy implements ConnectionKeepAliveStrategy { 60 61 public long getKeepAliveDuration(HttpResponse response, HttpContext context) { 62 if (response == null) { 63 throw new IllegalArgumentException("HTTP response may not be null"); 64 } 65 HeaderElementIterator it = new BasicHeaderElementIterator( 66 response.headerIterator(HTTP.CONN_KEEP_ALIVE)); 67 while (it.hasNext()) { 68 HeaderElement he = it.nextElement(); 69 String param = he.getName(); 70 String value = he.getValue(); 71 if (value != null && param.equalsIgnoreCase("timeout")) { 72 try { 73 return Long.parseLong(value) * 1000; 74 } catch(NumberFormatException ignore) { 75 } 76 } 77 } 78 return -1; 79 } 80 81 } 82
