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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 static org.eclipse.jgit.util.HttpSupport.HDR_AUTHORIZATION;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.Collections;
import org.eclipse.jgit.annotations.Nullable;
import org.eclipse.jgit.lfs.internal.AtomicObjectOutputStream;
import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
import org.eclipse.jgit.lfs.lib.Constants;
import org.eclipse.jgit.lfs.server.LargeFileRepository;
import org.eclipse.jgit.lfs.server.Response;
import org.eclipse.jgit.lfs.server.Response.Action;
/**
* Repository storing large objects in the file system
*
* @since 4.3
*/
public class FileLfsRepository implements LargeFileRepository {
private final String url;
private final Path dir;
/**
* <p>Constructor for FileLfsRepository.</p>
*
* @param url
* external URL of this repository
* @param dir
* storage directory
* @throws java.io.IOException
*/
public FileLfsRepository(String url, Path dir) throws IOException {
this.url = url;
this.dir = dir;
Files.createDirectories(dir);
}
/** {@inheritDoc} */
@Override
public Response.Action getDownloadAction(AnyLongObjectId id) {
return getAction(id);
}
/** {@inheritDoc} */
@Override
public Action getUploadAction(AnyLongObjectId id, long size) {
return getAction(id);
}
/** {@inheritDoc} */
@Override
public @Nullable Action getVerifyAction(AnyLongObjectId id) {
return null;
}
/** {@inheritDoc} */
@Override
public long getSize(AnyLongObjectId id) throws IOException {
Path p = getPath(id);
if (Files.exists(p)) {
return Files.size(p);
} else {
return -1;
}
}
/**
* Get the storage directory
*
* @return the path of the storage directory
*/
public Path getDir() {
return dir;
}
/**
* Get the path where the given object is stored
*
* @param id
* id of a large object
* @return path the object's storage path
*/
protected Path getPath(AnyLongObjectId id) {
StringBuilder s = new StringBuilder(
Constants.LONG_OBJECT_ID_STRING_LENGTH + 6);
s.append(toHexCharArray(id.getFirstByte())).append('/');
s.append(toHexCharArray(id.getSecondByte())).append('/');
s.append(id.name());
return dir.resolve(s.toString());
}
private Response.Action getAction(AnyLongObjectId id) {
Response.Action a = new Response.Action();
a.href = url + id.getName();
a.header = Collections.singletonMap(HDR_AUTHORIZATION, "not:required"); //$NON-NLS-1$
return a;
}
ReadableByteChannel getReadChannel(AnyLongObjectId id)
throws IOException {
return FileChannel.open(getPath(id), StandardOpenOption.READ);
}
AtomicObjectOutputStream getOutputStream(AnyLongObjectId id)
throws IOException {
Path path = getPath(id);
Path parent = path.getParent();
if (parent != null) {
Files.createDirectories(parent);
}
return new AtomicObjectOutputStream(path, id);
}
private static char[] toHexCharArray(int b) {
final char[] dst = new char[2];
formatHexChar(dst, 0, b);
return dst;
}
private static final char[] hexchar = { '0', '1', '2', '3', '4', '5', '6',
'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
private static void formatHexChar(final char[] dst, final int p, int b) {
int o = p + 1;
while (o >= p && b != 0) {
dst[o--] = hexchar[b & 0xf];
b >>>= 4;
}
while (o >= p)
dst[o--] = '0';
}
}
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