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/*
* Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
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 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
* if an IO error occurred
*/
public FileLfsRepository(String url, Path dir) throws IOException {
this.url = url;
this.dir = dir;
Files.createDirectories(dir);
}
@Override
public Response.Action getDownloadAction(AnyLongObjectId id) {
return getAction(id);
}
@Override
public Action getUploadAction(AnyLongObjectId id, long size) {
return getAction(id);
}
@Override
@Nullable
public Action getVerifyAction(AnyLongObjectId id) {
return null;
}
@Override
public long getSize(AnyLongObjectId id) throws IOException {
Path p = getPath(id);
if (Files.exists(p)) {
return Files.size(p);
}
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(char[] dst, 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';
}
/**
* Get URL of content server
*
* @return the url of the content server
* @since 4.11
*/
public String getUrl() {
return url;
}
/**
* Set the URL of the content server
*
* @param url
* the url of the content server
* @since 4.11
*/
public void setUrl(String url) {
this.url = url;
}
}
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