| /* |
| * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/io/SocketInputBuffer.java $ |
| * $Revision: 560358 $ |
| * $Date: 2007-07-27 12:30:42 -0700 (Fri, 27 Jul 2007) $ |
| * |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.http.impl.io; |
| |
| import java.io.IOException; |
| import java.io.InterruptedIOException; |
| import java.net.Socket; |
| |
| import org.apache.http.params.HttpParams; |
| |
| |
| /** |
| * {@link Socket} bound session input buffer. |
| * |
| * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> |
| * |
| * @version $Revision: 560358 $ |
| * |
| * @since 4.0 |
| */ |
| public class SocketInputBuffer extends AbstractSessionInputBuffer { |
| |
| static private final Class SOCKET_TIMEOUT_CLASS = SocketTimeoutExceptionClass(); |
| |
| /** |
| * Returns <code>SocketTimeoutExceptionClass<code> or <code>null</code> if the class |
| * does not exist. |
| * |
| * @return <code>SocketTimeoutExceptionClass<code>, or <code>null</code> if unavailable. |
| */ |
| static private Class SocketTimeoutExceptionClass() { |
| try { |
| return Class.forName("java.net.SocketTimeoutException"); |
| } catch (ClassNotFoundException e) { |
| return null; |
| } |
| } |
| |
| private static boolean isSocketTimeoutException(final InterruptedIOException e) { |
| if (SOCKET_TIMEOUT_CLASS != null) { |
| return SOCKET_TIMEOUT_CLASS.isInstance(e); |
| } else { |
| return true; |
| } |
| } |
| |
| private final Socket socket; |
| |
| public SocketInputBuffer( |
| final Socket socket, |
| int buffersize, |
| final HttpParams params) throws IOException { |
| super(); |
| if (socket == null) { |
| throw new IllegalArgumentException("Socket may not be null"); |
| } |
| this.socket = socket; |
| if (buffersize < 0) { |
| buffersize = socket.getReceiveBufferSize(); |
| } |
| if (buffersize < 1024) { |
| buffersize = 1024; |
| } |
| init(socket.getInputStream(), buffersize, params); |
| } |
| |
| public boolean isDataAvailable(int timeout) throws IOException { |
| boolean result = hasBufferedData(); |
| if (!result) { |
| int oldtimeout = this.socket.getSoTimeout(); |
| try { |
| this.socket.setSoTimeout(timeout); |
| fillBuffer(); |
| result = hasBufferedData(); |
| } catch (InterruptedIOException e) { |
| if (!isSocketTimeoutException(e)) { |
| throw e; |
| } |
| } finally { |
| socket.setSoTimeout(oldtimeout); |
| } |
| } |
| return result; |
| } |
| |
| } |