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- /*
- * Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- package org.eclipse.jgit.lfs.server.fs;
-
- import java.io.IOException;
- import java.nio.ByteBuffer;
- import java.nio.channels.Channels;
- import java.nio.channels.ReadableByteChannel;
- import java.nio.channels.WritableByteChannel;
- import java.util.logging.Level;
- import java.util.logging.Logger;
-
- import javax.servlet.AsyncContext;
- import javax.servlet.ServletOutputStream;
- import javax.servlet.WriteListener;
- import javax.servlet.http.HttpServletResponse;
-
- import org.apache.http.HttpStatus;
- import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
- import org.eclipse.jgit.lfs.lib.Constants;
- import org.eclipse.jgit.util.HttpSupport;
-
- /**
- * Handle asynchronous large object download.
- *
- * @since 4.7
- */
- public class ObjectDownloadListener implements WriteListener {
-
- private static Logger LOG = Logger
- .getLogger(ObjectDownloadListener.class.getName());
-
- private final AsyncContext context;
-
- private final HttpServletResponse response;
-
- private final ServletOutputStream out;
-
- private final ReadableByteChannel in;
-
- private final WritableByteChannel outChannel;
-
- private final ByteBuffer buffer = ByteBuffer.allocateDirect(8192);
-
- /**
- * <p>Constructor for ObjectDownloadListener.</p>
- *
- * @param repository
- * the repository storing large objects
- * @param context
- * the servlet asynchronous context
- * @param response
- * the servlet response
- * @param id
- * id of the object to be downloaded
- * @throws java.io.IOException
- */
- public ObjectDownloadListener(FileLfsRepository repository,
- AsyncContext context, HttpServletResponse response,
- AnyLongObjectId id) throws IOException {
- this.context = context;
- this.response = response;
- this.in = repository.getReadChannel(id);
- this.out = response.getOutputStream();
- this.outChannel = Channels.newChannel(out);
-
- response.addHeader(HttpSupport.HDR_CONTENT_LENGTH,
- String.valueOf(repository.getSize(id)));
- response.setContentType(Constants.HDR_APPLICATION_OCTET_STREAM);
- }
-
- /**
- * {@inheritDoc}
- *
- * Write file content
- */
- @Override
- public void onWritePossible() throws IOException {
- while (out.isReady()) {
- if (in.read(buffer) != -1) {
- buffer.flip();
- outChannel.write(buffer);
- buffer.compact();
- } else {
- in.close();
- buffer.flip();
- while (out.isReady()) {
- if (buffer.hasRemaining()) {
- outChannel.write(buffer);
- } else {
- context.complete();
- }
- }
- }
- }
- }
-
- /**
- * {@inheritDoc}
- *
- * Handle errors
- */
- @Override
- public void onError(Throwable e) {
- try {
- FileLfsServlet.sendError(response,
- HttpStatus.SC_INTERNAL_SERVER_ERROR, e.getMessage());
- context.complete();
- in.close();
- } catch (IOException ex) {
- LOG.log(Level.SEVERE, ex.getMessage(), ex);
- }
- }
- }
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