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 package org.apache.hc.client5.http.impl; 28 29 import org.apache.hc.core5.annotation.Contract; 30 import org.apache.hc.core5.annotation.ThreadingBehavior; 31 import org.apache.hc.core5.http.HttpRequest; 32 import org.apache.hc.core5.http.HttpResponse; 33 import org.apache.hc.core5.http.HttpStatus; 34 import org.apache.hc.core5.http.Method; 35 import org.apache.hc.core5.http.impl.DefaultConnectionReuseStrategy; 36 import org.apache.hc.core5.http.protocol.HttpContext; 37 38 /** 39 * Extension of core {@link DefaultConnectionReuseStrategy} that treats 40 * CONNECT method exchanges involved in proxy tunnelling as a special case. 41 * 42 * @since 5.2 43 */ 44 @Contract(threading = ThreadingBehavior.STATELESS) 45 public class DefaultClientConnectionReuseStrategy extends DefaultConnectionReuseStrategy { 46 47 /** 48 * Default instance of {@link DefaultClientConnectionReuseStrategy}. 49 */ 50 public static final DefaultClientConnectionReuseStrategy INSTANCE = new DefaultClientConnectionReuseStrategy(); 51 52 @Override 53 public boolean keepAlive(final HttpRequest request, final HttpResponse response, final HttpContext context) { 54 if (Method.CONNECT.isSame(request.getMethod()) && response.getCode() == HttpStatus.SC_OK) { 55 return true; 56 } 57 return super.keepAlive(request, response, context); 58 } 59 60 }