| /* |
| * $HeadURL: $ |
| * $Revision: $ |
| * $Date: $ |
| * |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.http.impl.client; |
| |
| import org.apache.http.HeaderElement; |
| import org.apache.http.HeaderElementIterator; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.conn.ConnectionKeepAliveStrategy; |
| import org.apache.http.message.BasicHeaderElementIterator; |
| import org.apache.http.protocol.HTTP; |
| import org.apache.http.protocol.HttpContext; |
| |
| /** |
| * Default implementation of a strategy deciding duration |
| * that a connection can remain idle. |
| * |
| * The default implementation looks solely at the 'Keep-Alive' |
| * header's timeout token. |
| * |
| * @author <a href="mailto:sberlin at gmail.com">Sam Berlin</a> |
| * |
| * @version $Revision: $ |
| * |
| * @since 4.0 |
| */ |
| public class DefaultConnectionKeepAliveStrategy implements ConnectionKeepAliveStrategy { |
| |
| public long getKeepAliveDuration(HttpResponse response, HttpContext context) { |
| if (response == null) { |
| throw new IllegalArgumentException("HTTP response may not be null"); |
| } |
| HeaderElementIterator it = new BasicHeaderElementIterator( |
| response.headerIterator(HTTP.CONN_KEEP_ALIVE)); |
| while (it.hasNext()) { |
| HeaderElement he = it.nextElement(); |
| String param = he.getName(); |
| String value = he.getValue(); |
| if (value != null && param.equalsIgnoreCase("timeout")) { |
| try { |
| return Long.parseLong(value) * 1000; |
| } catch(NumberFormatException ignore) { |
| } |
| } |
| } |
| return -1; |
| } |
| |
| } |