| /* |
| * ==================================================================== |
| * 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.hc.core5.http.nio.entity; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.ByteBuffer; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.hc.core5.http.ContentType; |
| import org.apache.hc.core5.http.nio.AsyncEntityProducer; |
| import org.apache.hc.core5.http.nio.DataStreamChannel; |
| import org.apache.hc.core5.io.Closer; |
| import org.apache.hc.core5.util.Args; |
| import org.apache.hc.core5.util.Asserts; |
| |
| /** |
| * {@link AsyncEntityProducer} implementation that generates data stream |
| * from content of a {@link File}. |
| * |
| * @since 5.0 |
| */ |
| public final class FileEntityProducer implements AsyncEntityProducer { |
| |
| private final File file; |
| private final ByteBuffer byteBuffer; |
| private final long length; |
| private final ContentType contentType; |
| private final boolean chunked; |
| private final AtomicReference<Exception> exception; |
| private final AtomicReference<RandomAccessFile> accessFileRef; |
| private boolean eof; |
| |
| public FileEntityProducer(final File file, final int bufferSize, final ContentType contentType, final boolean chunked) { |
| this.file = Args.notNull(file, "File"); |
| this.length = file.length(); |
| this.byteBuffer = ByteBuffer.allocate(bufferSize); |
| this.contentType = contentType; |
| this.chunked = chunked; |
| this.accessFileRef = new AtomicReference<>(null); |
| this.exception = new AtomicReference<>(null); |
| } |
| |
| public FileEntityProducer(final File file, final ContentType contentType, final boolean chunked) { |
| this(file, 8192, contentType, chunked); |
| } |
| |
| public FileEntityProducer(final File file, final ContentType contentType) { |
| this(file, contentType, false); |
| } |
| |
| public FileEntityProducer(final File file) { |
| this(file, ContentType.APPLICATION_OCTET_STREAM); |
| } |
| |
| @Override |
| public boolean isRepeatable() { |
| return true; |
| } |
| |
| @Override |
| public String getContentType() { |
| return contentType != null ? contentType.toString() : null; |
| } |
| |
| @Override |
| public long getContentLength() { |
| return length; |
| } |
| |
| @Override |
| public int available() { |
| return Integer.MAX_VALUE; |
| } |
| |
| @Override |
| public String getContentEncoding() { |
| return null; |
| } |
| |
| @Override |
| public boolean isChunked() { |
| return chunked; |
| } |
| |
| @Override |
| public Set<String> getTrailerNames() { |
| return null; |
| } |
| |
| @Override |
| public void produce(final DataStreamChannel channel) throws IOException { |
| @SuppressWarnings("resource") |
| RandomAccessFile accessFile = accessFileRef.get(); |
| if (accessFile == null) { |
| accessFile = new RandomAccessFile(file, "r"); |
| Asserts.check(accessFileRef.getAndSet(accessFile) == null, "Illegal producer state"); |
| } |
| if (!eof) { |
| final int bytesRead = accessFile.getChannel().read(byteBuffer); |
| if (bytesRead < 0) { |
| eof = true; |
| } |
| } |
| if (byteBuffer.position() > 0) { |
| byteBuffer.flip(); |
| channel.write(byteBuffer); |
| byteBuffer.compact(); |
| } |
| if (eof && byteBuffer.position() == 0) { |
| channel.endStream(); |
| releaseResources(); |
| } |
| } |
| |
| @Override |
| public void failed(final Exception cause) { |
| if (exception.compareAndSet(null, cause)) { |
| releaseResources(); |
| } |
| } |
| |
| public Exception getException() { |
| return exception.get(); |
| } |
| |
| @Override |
| public void releaseResources() { |
| eof = false; |
| Closer.closeQuietly(accessFileRef.getAndSet(null)); |
| } |
| |
| } |