| /* |
| * 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 |
| */ |
| 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); |
| |
| /** |
| * @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 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); |
| } |
| |
| /** |
| * Write file content |
| * |
| * @throws IOException |
| */ |
| @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(); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Handle errors |
| * |
| * @param e |
| * the cause |
| */ |
| @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); |
| } |
| } |
| } |