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/io/SocketInputBuffer.java $ 3069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Revision: 560358 $ 4069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Date: 2007-07-27 12:30:42 -0700 (Fri, 27 Jul 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.io; 33069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 34069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.IOException; 35069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.InterruptedIOException; 36069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.net.Socket; 37e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughesimport java.net.SocketTimeoutException; 38069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 39091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilsonimport java.net.SocketTimeoutException; 40069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport org.apache.http.params.HttpParams; 41069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 42069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 43069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/** 44069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link Socket} bound session input buffer. 45069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 46069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 47069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 48069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @version $Revision: 560358 $ 49e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes * 50069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @since 4.0 51d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * 52d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * @deprecated Please use {@link java.net.URL#openConnection} instead. 53d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 54d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath * for further details. 55069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 56d42abb2fd917184764daf22f5f299e848b8701d7Narayan Kamath@Deprecated 57069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpublic class SocketInputBuffer extends AbstractSessionInputBuffer { 58069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 59069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private final Socket socket; 60e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes 61069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public SocketInputBuffer( 62e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes final Socket socket, 63e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes int buffersize, 64069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project final HttpParams params) throws IOException { 65069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project super(); 66069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (socket == null) { 67069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalArgumentException("Socket may not be null"); 68069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 69069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.socket = socket; 70e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // BEGIN android-changed 71e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // Workaround for http://b/3514259. We take 'buffersize' as a hint in 72e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // the weakest sense, and always use an 8KiB heap buffer and leave the 73e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // kernel buffer size alone, trusting the system to have set a 74e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // network-appropriate default. 75e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes init(socket.getInputStream(), 8192, params); 76e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes // END android-changed 77069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 78e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes 79069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public boolean isDataAvailable(int timeout) throws IOException { 80069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project boolean result = hasBufferedData(); 81069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (!result) { 82069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int oldtimeout = this.socket.getSoTimeout(); 83069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 84069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.socket.setSoTimeout(timeout); 85069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project fillBuffer(); 86069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project result = hasBufferedData(); 87069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (InterruptedIOException e) { 88e30b5b55806b31d1a61e2885b854dd7b8da1a07aElliott Hughes if (!(e instanceof SocketTimeoutException)) { 89069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw e; 90069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 91069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } finally { 92069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project socket.setSoTimeout(oldtimeout); 93069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 94069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 95069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return result; 96069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 97069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 98091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson // BEGIN android-added 99091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson /** 100091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * Returns true if the connection is probably functional. It's insufficient 101091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * to rely on isDataAvailable() returning normally; that approach cannot 102091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * distinguish between an exhausted stream and a stream with zero bytes 103091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * buffered. 104091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * 105091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson * @hide 106091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson */ 107091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson public boolean isStale() throws IOException { 108091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson if (hasBufferedData()) { 109091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson return false; 110091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } 111091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson int oldTimeout = this.socket.getSoTimeout(); 112091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson try { 113091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson this.socket.setSoTimeout(1); 114091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson return fillBuffer() == -1; 115091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } catch (SocketTimeoutException e) { 116091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson return false; // the connection is not stale; hooray 117091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } catch (IOException e) { 118091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson return true; // the connection is stale, the read or soTimeout failed. 119091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } finally { 120091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson this.socket.setSoTimeout(oldTimeout); 121091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } 122091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson } 123091f7ca4958c6f41c79808913c84ceea56d73b12Jesse Wilson // END android-added 124069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project} 125