BasicHttpEntity.java revision 069490a5ca2fd1988d29daf45d892f47ad665115
1069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/* 2069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/BasicHttpEntity.java $ 3069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Revision: 496070 $ 4069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $ 5069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 6069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 7069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one 8069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * or more contributor license agreements. See the NOTICE file 9069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * distributed with this work for additional information 10069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * regarding copyright ownership. The ASF licenses this file 11069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * to you under the Apache License, Version 2.0 (the 12069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "License"); you may not use this file except in compliance 13069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * with the License. You may obtain a copy of the License at 14069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 15069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 16069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 17069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Unless required by applicable law or agreed to in writing, 18069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * software distributed under the License is distributed on an 19069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * KIND, either express or implied. See the License for the 21069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * specific language governing permissions and limitations 22069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * under the License. 23069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 24069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 25069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This software consists of voluntary contributions made by many 26069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * individuals on behalf of the Apache Software Foundation. For more 27069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * information on the Apache Software Foundation, please see 28069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <http://www.apache.org/>. 29069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 30069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 31069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 32069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpackage org.apache.http.entity; 33069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 34069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.IOException; 35069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.InputStream; 36069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.OutputStream; 37069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 38069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/** 39069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A generic streamed entity being received on a connection. 40069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 41069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 42069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 43069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @version $Revision: 496070 $ 44069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 45069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @since 4.0 46069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 47069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpublic class BasicHttpEntity extends AbstractHttpEntity { 48069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 49069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private InputStream content; 50069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private boolean contentObtained; 51069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private long length; 52069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 53069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 54069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Creates a new basic entity. 55069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The content is initially missing, the content length 56069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * is set to a negative number. 57069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 58069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public BasicHttpEntity() { 59069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project super(); 60069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.length = -1; 61069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 62069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 63069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see interface HttpEntity 64069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public long getContentLength() { 65069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return this.length; 66069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 67069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 68069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 69069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Obtains the content, once only. 70069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 71069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return the content, if this is the first call to this method 72069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * since {@link #setContent setContent} has been called 73069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 74069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IllegalStateException 75069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * if the content has been obtained before, or 76069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * has not yet been provided 77069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 78069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public InputStream getContent() 79069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throws IllegalStateException { 80069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (this.content == null) { 81069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalStateException("Content has not been provided"); 82069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 83069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (this.contentObtained) { 84069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalStateException("Content has been consumed"); 85069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 86069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.contentObtained = true; 87069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return this.content; 88069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 89069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } // getContent 90069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 91069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 92069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Tells that this entity is not repeatable. 93069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 94069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return <code>false</code> 95069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 96069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public boolean isRepeatable() { 97069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return false; 98069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 99069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 100069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 101069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Specifies the length of the content. 102069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 103069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param len the number of bytes in the content, or 104069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * a negative number to indicate an unknown length 105069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 106069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void setContentLength(long len) { 107069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.length = len; 108069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 109069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 110069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 111069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Specifies the content. 112069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 113069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param instream the stream to return with the next call to 114069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link #getContent getContent} 115069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 116069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void setContent(final InputStream instream) { 117069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.content = instream; 118069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.contentObtained = false; 119069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 120069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 121069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see interface HttpEntity 122069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void writeTo(final OutputStream outstream) throws IOException { 123069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (outstream == null) { 124069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalArgumentException("Output stream may not be null"); 125069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 126069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project InputStream instream = getContent(); 127069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int l; 128069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project byte[] tmp = new byte[2048]; 129069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project while ((l = instream.read(tmp)) != -1) { 130069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project outstream.write(tmp, 0, l); 131069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 132069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 133069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 134069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see interface HttpEntity 135069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public boolean isStreaming() { 136069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return !this.contentObtained && this.content != null; 137069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 138069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 139069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see interface HttpEntity 140069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void consumeContent() throws IOException { 141069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (content != null) { 142069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project content.close(); // reads to the end of the entity 143069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 144069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 145069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 146069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project} // class BasicHttpEntity 147