| /* |
| * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/InputStreamEntity.java $ |
| * $Revision: 617591 $ |
| * $Date: 2008-02-01 10:21:17 -0800 (Fri, 01 Feb 2008) $ |
| * |
| * ==================================================================== |
| * 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.entity; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * A streamed entity obtaining content from an {@link InputStream InputStream}. |
| * |
| * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> |
| * |
| * @version $Revision: 617591 $ |
| * |
| * @since 4.0 |
| */ |
| public class InputStreamEntity extends AbstractHttpEntity { |
| |
| private final static int BUFFER_SIZE = 2048; |
| |
| private final InputStream content; |
| private final long length; |
| private boolean consumed = false; |
| |
| public InputStreamEntity(final InputStream instream, long length) { |
| super(); |
| if (instream == null) { |
| throw new IllegalArgumentException("Source input stream may not be null"); |
| } |
| this.content = instream; |
| this.length = length; |
| } |
| |
| public boolean isRepeatable() { |
| return false; |
| } |
| |
| public long getContentLength() { |
| return this.length; |
| } |
| |
| public InputStream getContent() throws IOException { |
| return this.content; |
| } |
| |
| public void writeTo(final OutputStream outstream) throws IOException { |
| if (outstream == null) { |
| throw new IllegalArgumentException("Output stream may not be null"); |
| } |
| InputStream instream = this.content; |
| byte[] buffer = new byte[BUFFER_SIZE]; |
| int l; |
| if (this.length < 0) { |
| // consume until EOF |
| while ((l = instream.read(buffer)) != -1) { |
| outstream.write(buffer, 0, l); |
| } |
| } else { |
| // consume no more than length |
| long remaining = this.length; |
| while (remaining > 0) { |
| l = instream.read(buffer, 0, (int)Math.min(BUFFER_SIZE, remaining)); |
| if (l == -1) { |
| break; |
| } |
| outstream.write(buffer, 0, l); |
| remaining -= l; |
| } |
| } |
| this.consumed = true; |
| } |
| |
| // non-javadoc, see interface HttpEntity |
| public boolean isStreaming() { |
| return !this.consumed; |
| } |
| |
| // non-javadoc, see interface HttpEntity |
| public void consumeContent() throws IOException { |
| this.consumed = true; |
| // If the input stream is from a connection, closing it will read to |
| // the end of the content. Otherwise, we don't care what it does. |
| this.content.close(); |
| } |
| |
| } // class InputStreamEntity |