1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/entity/EntityDeserializer.java $ 3 * $Revision: 560358 $ 4 * $Date: 2007-07-27 12:30:42 -0700 (Fri, 27 Jul 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.impl.entity; 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.HttpMessage; 40 import org.apache.http.entity.BasicHttpEntity; 41 import org.apache.http.entity.ContentLengthStrategy; 42 import org.apache.http.impl.io.ChunkedInputStream; 43 import org.apache.http.impl.io.ContentLengthInputStream; 44 import org.apache.http.impl.io.IdentityInputStream; 45 import org.apache.http.io.SessionInputBuffer; 46 import org.apache.http.protocol.HTTP; 47 48 /** 49 * Default implementation of an entity deserializer. 50 * <p> 51 * This entity deserializer currently supports only "chunked" and "identitiy" transfer-coding</a> 52 * </p> 53 * 54 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 55 * 56 * @version $Revision: 560358 $ 57 * 58 * @since 4.0 59 */ 60 public class EntityDeserializer { 61 62 private final ContentLengthStrategy lenStrategy; 63 EntityDeserializer(final ContentLengthStrategy lenStrategy)64 public EntityDeserializer(final ContentLengthStrategy lenStrategy) { 65 super(); 66 if (lenStrategy == null) { 67 throw new IllegalArgumentException("Content length strategy may not be null"); 68 } 69 this.lenStrategy = lenStrategy; 70 } 71 doDeserialize( final SessionInputBuffer inbuffer, final HttpMessage message)72 protected BasicHttpEntity doDeserialize( 73 final SessionInputBuffer inbuffer, 74 final HttpMessage message) throws HttpException, IOException { 75 BasicHttpEntity entity = new BasicHttpEntity(); 76 77 long len = this.lenStrategy.determineLength(message); 78 if (len == ContentLengthStrategy.CHUNKED) { 79 entity.setChunked(true); 80 entity.setContentLength(-1); 81 entity.setContent(new ChunkedInputStream(inbuffer)); 82 } else if (len == ContentLengthStrategy.IDENTITY) { 83 entity.setChunked(false); 84 entity.setContentLength(-1); 85 entity.setContent(new IdentityInputStream(inbuffer)); 86 } else { 87 entity.setChunked(false); 88 entity.setContentLength(len); 89 entity.setContent(new ContentLengthInputStream(inbuffer, len)); 90 } 91 92 Header contentTypeHeader = message.getFirstHeader(HTTP.CONTENT_TYPE); 93 if (contentTypeHeader != null) { 94 entity.setContentType(contentTypeHeader); 95 } 96 Header contentEncodingHeader = message.getFirstHeader(HTTP.CONTENT_ENCODING); 97 if (contentEncodingHeader != null) { 98 entity.setContentEncoding(contentEncodingHeader); 99 } 100 return entity; 101 } 102 deserialize( final SessionInputBuffer inbuffer, final HttpMessage message)103 public HttpEntity deserialize( 104 final SessionInputBuffer inbuffer, 105 final HttpMessage message) throws HttpException, IOException { 106 if (inbuffer == null) { 107 throw new IllegalArgumentException("Session input buffer may not be null"); 108 } 109 if (message == null) { 110 throw new IllegalArgumentException("HTTP message may not be null"); 111 } 112 return doDeserialize(inbuffer, message); 113 } 114 115 } 116