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/impl/entity/LaxContentLengthStrategy.java $ 3069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Revision: 576073 $ 4069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Date: 2007-09-16 03:53:13 -0700 (Sun, 16 Sep 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.impl.entity; 33069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 34069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.Header; 35069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.HeaderElement; 36069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.HttpException; 37069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.HttpMessage; 38069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.ParseException; 39069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.ProtocolException; 40069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.entity.ContentLengthStrategy; 41069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.params.HttpParams; 42069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.params.CoreProtocolPNames; 43069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.protocol.HTTP; 44069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 45069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/** 46069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The lax implementation of the content length strategy. 47069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 48069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This strategy conforms to the entity transfer rules outlined in 49069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec4.4">Section 4.4</a>, 50069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6">Section 3.6</a>, 51069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.41">Section 14.41</a> 52069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * and <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec14.13">Section 14.13</a> 53069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * of <a href="http://www.w3.org/Protocols/rfc2616/rfc2616.txt">RFC 2616</a>, but is lenient 54069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * about unsupported transfer codecs and malformed content-length headers. 55069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 56069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <h>4.4 Message Length</h> 57069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 58069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The transfer-length of a message is the length of the message-body as it appears in the 59069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message; that is, after any transfer-codings have been applied. When a message-body is 60069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * included with a message, the transfer-length of that body is determined by one of the 61069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * following (in order of precedence): 62069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 63069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 64069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 1.Any response message which "MUST NOT" include a message-body (such as the 1xx, 204, 65069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * and 304 responses and any response to a HEAD request) is always terminated by the first 66069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * empty line after the header fields, regardless of the entity-header fields present in the 67069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message. 68069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 69069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 70069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 2.If a Transfer-Encoding header field (section 14.41) is present and has any value other 71069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * than "identity", then the transfer-length is defined by use of the "chunked" transfer- 72069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * coding (section 3.6), unless the message is terminated by closing the connection. 73069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 74069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 75069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 3.If a Content-Length header field (section 14.13) is present, its decimal value in 76069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * OCTETs represents both the entity-length and the transfer-length. The Content-Length 77069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * header field MUST NOT be sent if these two lengths are different (i.e., if a 78069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Transfer-Encoding 79069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 80069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 81069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * header field is present). If a message is received with both a 82069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Transfer-Encoding header field and a Content-Length header field, 83069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the latter MUST be ignored. 84069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 85069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 86069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 4.If the message uses the media type "multipart/byteranges", and the ransfer-length is not 87069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * otherwise specified, then this self- elimiting media type defines the transfer-length. 88069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This media type UST NOT be used unless the sender knows that the recipient can arse it; the 89069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * presence in a request of a Range header with ultiple byte- range specifiers from a 1.1 90069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * client implies that the lient can parse multipart/byteranges responses. 91069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 92069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 93069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A range header might be forwarded by a 1.0 proxy that does not 94069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * understand multipart/byteranges; in this case the server MUST 95069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * delimit the message using methods defined in items 1,3 or 5 of 96069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * this section. 97069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 98069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 99069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 5.By the server closing the connection. (Closing the connection cannot be used to indicate 100069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the end of a request body, since that would leave no possibility for the server to send back 101069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * a response.) 102069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 103069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 104069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * For compatibility with HTTP/1.0 applications, HTTP/1.1 requests containing a message-body 105069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * MUST include a valid Content-Length header field unless the server is known to be HTTP/1.1 106069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * compliant. If a request contains a message-body and a Content-Length is not given, the 107069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * server SHOULD respond with 400 (bad request) if it cannot determine the length of the 108069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message, or with 411 (length required) if it wishes to insist on receiving a valid 109069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Content-Length. 110069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 111069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p>All HTTP/1.1 applications that receive entities MUST accept the "chunked" transfer-coding 112069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * (section 3.6), thus allowing this mechanism to be used for messages when the message 113069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * length cannot be determined in advance. 114069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 115069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <h>3.6 Transfer Codings</h> 116069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 117069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Transfer-coding values are used to indicate an encoding transformation that 118069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * has been, can be, or may need to be applied to an entity-body in order to ensure 119069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "safe transport" through the network. This differs from a content coding in that 120069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the transfer-coding is a property of the message, not of the original entity. 121069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 122069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 123069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * transfer-coding = "chunked" | transfer-extension 124069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * transfer-extension = token *( ";" parameter ) 125069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 126069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 127069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Parameters are in the form of attribute/value pairs. 128069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 129069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 130069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * parameter = attribute "=" value 131069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * attribute = token 132069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * value = token | quoted-string 133069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 134069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 135069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * All transfer-coding values are case-insensitive. HTTP/1.1 uses transfer-coding values in 136069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the TE header field (section 14.39) and in the Transfer-Encoding header field (section 14.41). 137069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 138069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 139069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Whenever a transfer-coding is applied to a message-body, the set of transfer-codings MUST 140069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * include "chunked", unless the message is terminated by closing the connection. When the 141069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "chunked" transfer-coding is used, it MUST be the last transfer-coding applied to the 142069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message-body. The "chunked" transfer-coding MUST NOT be applied more than once to a 143069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message-body. These rules allow the recipient to determine the transfer-length of the 144069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * message (section 4.4). 145069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 146069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <h>14.41 Transfer-Encoding</h> 147069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 148069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The Transfer-Encoding general-header field indicates what (if any) type of transformation has 149069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * been applied to the message body in order to safely transfer it between the sender and the 150069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * recipient. This differs from the content-coding in that the transfer-coding is a property of 151069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the message, not of the entity. 152069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 153069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 154069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Transfer-Encoding = "Transfer-Encoding" ":" 1#transfer-coding 155069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 156069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 157069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * If multiple encodings have been applied to an entity, the transfer- codings MUST be listed in 158069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the order in which they were applied. Additional information about the encoding parameters 159069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * MAY be provided by other entity-header fields not defined by this specification. 160069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 161069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <h>14.13 Content-Length</h> 162069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 163069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The Content-Length entity-header field indicates the size of the entity-body, in decimal 164069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * number of OCTETs, sent to the recipient or, in the case of the HEAD method, the size of 165069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the entity-body that would have been sent had the request been a GET. 166069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 167069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <pre> 168069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Content-Length = "Content-Length" ":" 1*DIGIT 169069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </pre> 170069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 171069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Applications SHOULD use this field to indicate the transfer-length of the message-body, 172069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * unless this is prohibited by the rules in section 4.4. 173069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 174069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 175069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 176069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 177069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @version $Revision: 576073 $ 178069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 179069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @since 4.0 180d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * 181d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * @deprecated Please use {@link java.net.URL#openConnection} instead. 182d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 183d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * for further details. 184069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 185d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath@Deprecated 186069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpublic class LaxContentLengthStrategy implements ContentLengthStrategy { 187069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 188069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public LaxContentLengthStrategy() { 189069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project super(); 190069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 191069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 192069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public long determineLength(final HttpMessage message) throws HttpException { 193069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (message == null) { 194069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalArgumentException("HTTP message may not be null"); 195069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 196069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 197069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project HttpParams params = message.getParams(); 198069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project boolean strict = params.isParameterTrue(CoreProtocolPNames.STRICT_TRANSFER_ENCODING); 199069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 200069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Header transferEncodingHeader = message.getFirstHeader(HTTP.TRANSFER_ENCODING); 201069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Header contentLengthHeader = message.getFirstHeader(HTTP.CONTENT_LEN); 202069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // We use Transfer-Encoding if present and ignore Content-Length. 203069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // RFC2616, 4.4 item number 3 204069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (transferEncodingHeader != null) { 205069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project HeaderElement[] encodings = null; 206069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 207069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project encodings = transferEncodingHeader.getElements(); 208069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (ParseException px) { 209069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new ProtocolException 210069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project ("Invalid Transfer-Encoding header value: " + 211069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project transferEncodingHeader, px); 212069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 213069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (strict) { 214069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // Currently only chunk and identity are supported 215069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project for (int i = 0; i < encodings.length; i++) { 216069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project String encoding = encodings[i].getName(); 217069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (encoding != null && encoding.length() > 0 218069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project && !encoding.equalsIgnoreCase(HTTP.CHUNK_CODING) 219069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project && !encoding.equalsIgnoreCase(HTTP.IDENTITY_CODING)) { 220069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new ProtocolException("Unsupported transfer encoding: " + encoding); 221069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 222069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 223069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 224069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // The chunked encoding must be the last one applied RFC2616, 14.41 225069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int len = encodings.length; 226069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (HTTP.IDENTITY_CODING.equalsIgnoreCase(transferEncodingHeader.getValue())) { 227069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return IDENTITY; 228069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } else if ((len > 0) && (HTTP.CHUNK_CODING.equalsIgnoreCase( 229069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project encodings[len - 1].getName()))) { 230069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return CHUNKED; 231069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } else { 232069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (strict) { 233069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new ProtocolException("Chunk-encoding must be the last one applied"); 234069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 235069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return IDENTITY; 236069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 237069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } else if (contentLengthHeader != null) { 238069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project long contentlen = -1; 239069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Header[] headers = message.getHeaders(HTTP.CONTENT_LEN); 240069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (strict && headers.length > 1) { 241069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new ProtocolException("Multiple content length headers"); 242069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 243069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project for (int i = headers.length - 1; i >= 0; i--) { 244069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Header header = headers[i]; 245069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 246069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project contentlen = Long.parseLong(header.getValue()); 247069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project break; 248069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (NumberFormatException e) { 249069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (strict) { 250069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new ProtocolException("Invalid content length: " + header.getValue()); 251069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 252069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 253069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // See if we can have better luck with another header, if present 254069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 255069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (contentlen >= 0) { 256069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return contentlen; 257069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } else { 258069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return IDENTITY; 259069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 260069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } else { 261069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return IDENTITY; 262069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 263069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 264069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 265069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project} 266