1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/RequestExpectContinue.java $ 3 * $Revision: 573864 $ 4 * $Date: 2007-09-08 08:53:25 -0700 (Sat, 08 Sep 2007) $ 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.HttpEntity; 37 import org.apache.http.HttpEntityEnclosingRequest; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpRequest; 40 import org.apache.http.HttpRequestInterceptor; 41 import org.apache.http.HttpVersion; 42 import org.apache.http.ProtocolVersion; 43 import org.apache.http.params.HttpProtocolParams; 44 45 /** 46 * A request interceptor that enables the expect-continue handshake. 47 * 48 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 49 * 50 * @version $Revision: 573864 $ 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 RequestExpectContinue implements HttpRequestInterceptor { 60 RequestExpectContinue()61 public RequestExpectContinue() { 62 super(); 63 } 64 process(final HttpRequest request, final HttpContext context)65 public void process(final HttpRequest request, final HttpContext context) 66 throws HttpException, IOException { 67 if (request == null) { 68 throw new IllegalArgumentException("HTTP request may not be null"); 69 } 70 if (request instanceof HttpEntityEnclosingRequest) { 71 HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity(); 72 // Do not send the expect header if request body is known to be empty 73 if (entity != null && entity.getContentLength() != 0) { 74 ProtocolVersion ver = request.getRequestLine().getProtocolVersion(); 75 if (HttpProtocolParams.useExpectContinue(request.getParams()) 76 && !ver.lessEquals(HttpVersion.HTTP_1_0)) { 77 request.addHeader(HTTP.EXPECT_DIRECTIVE, HTTP.EXPECT_CONTINUE); 78 } 79 } 80 } 81 } 82 83 } 84