| /* |
| * ==================================================================== |
| * 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.knox.gateway.dispatch; |
| |
| import org.apache.http.entity.AbstractHttpEntity; |
| import org.apache.http.entity.ContentType; |
| import org.apache.http.util.Args; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * A streamed, non-repeatable entity that obtains its content froman {@link InputStream}. |
| * Copied from HttpClient source in order to increase buffer size. |
| */ |
| public class InputStreamEntity extends AbstractHttpEntity { |
| |
| // A value of 16K results in a significant performance improvement due to better HTTP chunking on the wire. |
| protected static final int OUTPUT_BUFFER_SIZE = 16 * 1024; |
| private final InputStream content; |
| private final long length; |
| |
| /** |
| * Creates an entity with an unknown length. |
| * Equivalent to {@code new InputStreamEntity(instream, -1)}. |
| * |
| * @param instream input stream |
| * @throws IllegalArgumentException if {@code instream} is {@code null} |
| */ |
| public InputStreamEntity( final InputStream instream ) { |
| this( instream, -1 ); |
| } |
| |
| /** |
| * Creates an entity with a specified content length. |
| * |
| * @param instream input stream |
| * @param length of the input stream, {@code -1} if unknown |
| * @throws IllegalArgumentException if {@code instream} is {@code null} |
| */ |
| public InputStreamEntity( final InputStream instream, final long length ) { |
| this( instream, length, null ); |
| } |
| |
| /** |
| * Creates an entity with a content type and unknown length. |
| * Equivalent to {@code new InputStreamEntity(instream, -1, contentType)}. |
| * |
| * @param instream input stream |
| * @param contentType content type |
| * @throws IllegalArgumentException if {@code instream} is {@code null} |
| */ |
| public InputStreamEntity( final InputStream instream, final ContentType contentType ) { |
| this( instream, -1, contentType ); |
| } |
| |
| /** |
| * @param instream input stream |
| * @param length of the input stream, {@code -1} if unknown |
| * @param contentType for specifying the {@code Content-Type} header, may be {@code null} |
| * @throws IllegalArgumentException if {@code instream} is {@code null} |
| */ |
| public InputStreamEntity( final InputStream instream, final long length, final ContentType contentType ) { |
| super(); |
| this.content = Args.notNull( instream, "Source input stream" ); |
| this.length = length; |
| if( contentType != null ) { |
| setContentType( contentType.toString() ); |
| } |
| } |
| |
| @Override |
| public boolean isRepeatable() { |
| return false; |
| } |
| |
| /** |
| * @return the content length or {@code -1} if unknown |
| */ |
| @Override |
| public long getContentLength() { |
| return this.length; |
| } |
| |
| @Override |
| public InputStream getContent() throws IOException { |
| return this.content; |
| } |
| |
| /** |
| * Writes bytes from the {@code InputStream} this entity was constructed |
| * with to an {@code OutputStream}. The content length |
| * determines how many bytes are written. If the length is unknown ({@code -1}), the |
| * stream will be completely consumed (to the end of the stream). |
| */ |
| @Override |
| public void writeTo(final OutputStream outstream ) throws IOException { |
| Args.notNull( outstream, "Output stream" ); |
| try (InputStream instream = this.content) { |
| final byte[] buffer = new byte[OUTPUT_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(OUTPUT_BUFFER_SIZE, remaining)); |
| if (l == -1) { |
| break; |
| } |
| outstream.write(buffer, 0, l); |
| remaining -= l; |
| } |
| } |
| } |
| } |
| |
| @Override |
| public boolean isStreaming() { |
| return true; |
| } |
| |
| } |