001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.impl.client; 029 030import org.apache.http.Header; 031import org.apache.http.HttpHeaders; 032import org.apache.http.HttpRequest; 033import org.apache.http.HttpResponse; 034import org.apache.http.TokenIterator; 035import org.apache.http.impl.DefaultConnectionReuseStrategy; 036import org.apache.http.message.BasicHeaderIterator; 037import org.apache.http.message.BasicTokenIterator; 038import org.apache.http.protocol.HTTP; 039import org.apache.http.protocol.HttpContext; 040import org.apache.http.protocol.HttpCoreContext; 041 042public class DefaultClientConnectionReuseStrategy extends DefaultConnectionReuseStrategy { 043 044 public static final DefaultClientConnectionReuseStrategy INSTANCE = new DefaultClientConnectionReuseStrategy(); 045 046 @Override 047 public boolean keepAlive(final HttpResponse response, final HttpContext context) { 048 049 final HttpRequest request = (HttpRequest) context.getAttribute(HttpCoreContext.HTTP_REQUEST); 050 if (request != null) { 051 final Header[] connHeaders = request.getHeaders(HttpHeaders.CONNECTION); 052 if (connHeaders.length != 0) { 053 final TokenIterator ti = new BasicTokenIterator(new BasicHeaderIterator(connHeaders, null)); 054 while (ti.hasNext()) { 055 final String token = ti.nextToken(); 056 if (HTTP.CONN_CLOSE.equalsIgnoreCase(token)) { 057 return false; 058 } 059 } 060 } 061 } 062 return super.keepAlive(response, context); 063 } 064 065}