1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/ResponseConnControl.java $ 3 * $Revision: 618017 $ 4 * $Date: 2008-02-03 08:42:22 -0800 (Sun, 03 Feb 2008) $ 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 32 package org.apache.http.protocol; 33 34 import java.io.IOException; 35 36 import org.apache.http.Header; 37 import org.apache.http.HttpEntity; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpRequest; 40 import org.apache.http.HttpResponse; 41 import org.apache.http.HttpResponseInterceptor; 42 import org.apache.http.HttpStatus; 43 import org.apache.http.HttpVersion; 44 import org.apache.http.ProtocolVersion; 45 46 /** 47 * A response interceptor that suggests connection keep-alive to the client. 48 * For use on the server side. 49 * 50 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 51 * 52 * @version $Revision: 618017 $ 53 * 54 * @since 4.0 55 * 56 * @deprecated Please use {@link java.net.URL#openConnection} instead. 57 * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 58 * for further details. 59 */ 60 @Deprecated 61 public class ResponseConnControl implements HttpResponseInterceptor { 62 ResponseConnControl()63 public ResponseConnControl() { 64 super(); 65 } 66 process(final HttpResponse response, final HttpContext context)67 public void process(final HttpResponse response, final HttpContext context) 68 throws HttpException, IOException { 69 if (response == null) { 70 throw new IllegalArgumentException("HTTP response may not be null"); 71 } 72 if (context == null) { 73 throw new IllegalArgumentException("HTTP context may not be null"); 74 } 75 // Always drop connection after certain type of responses 76 int status = response.getStatusLine().getStatusCode(); 77 if (status == HttpStatus.SC_BAD_REQUEST || 78 status == HttpStatus.SC_REQUEST_TIMEOUT || 79 status == HttpStatus.SC_LENGTH_REQUIRED || 80 status == HttpStatus.SC_REQUEST_TOO_LONG || 81 status == HttpStatus.SC_REQUEST_URI_TOO_LONG || 82 status == HttpStatus.SC_SERVICE_UNAVAILABLE || 83 status == HttpStatus.SC_NOT_IMPLEMENTED) { 84 response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE); 85 return; 86 } 87 // Always drop connection for HTTP/1.0 responses and below 88 // if the content body cannot be correctly delimited 89 HttpEntity entity = response.getEntity(); 90 if (entity != null) { 91 ProtocolVersion ver = response.getStatusLine().getProtocolVersion(); 92 if (entity.getContentLength() < 0 && 93 (!entity.isChunked() || ver.lessEquals(HttpVersion.HTTP_1_0))) { 94 response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE); 95 return; 96 } 97 } 98 // Drop connection if requested by the client 99 HttpRequest request = (HttpRequest) 100 context.getAttribute(ExecutionContext.HTTP_REQUEST); 101 if (request != null) { 102 Header header = request.getFirstHeader(HTTP.CONN_DIRECTIVE); 103 if (header != null) { 104 response.setHeader(HTTP.CONN_DIRECTIVE, header.getValue()); 105 } 106 } 107 } 108 109 } 110