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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed 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.
*/
package com.android.sharedstoragebackup;
import android.app.Service;
import android.app.backup.FullBackup;
import android.app.backup.FullBackupDataOutput;
import android.app.backup.IBackupManager;
import android.content.Intent;
import android.os.Environment;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.util.Log;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import com.android.internal.backup.IObbBackupService;
/**
* Service that the Backup Manager Services delegates OBB backup/restore operations to,
* because those require accessing external storage.
*
* {@hide}
*/
public class ObbBackupService extends Service {
static final String TAG = "ObbBackupService";
static final boolean DEBUG = true;
/**
* IObbBackupService interface implementation
*/
IObbBackupService mService = new IObbBackupService.Stub() {
/*
* Back up a package's OBB directory tree
*/
@Override
public void backupObbs(String packageName, ParcelFileDescriptor data,
int token, IBackupManager callbackBinder) {
final FileDescriptor outFd = data.getFileDescriptor();
try {
File obbDir = Environment.buildExternalStorageAppObbDirs(packageName)[0];
if (obbDir != null) {
if (obbDir.exists()) {
ArrayList<File> obbList = allFileContents(obbDir);
if (obbList != null) {
// okay, there's at least something there
if (DEBUG) {
Log.i(TAG, obbList.size() + " files to back up");
}
final String rootPath = obbDir.getCanonicalPath();
final FullBackupDataOutput out = new FullBackupDataOutput(data);
for (File f : obbList) {
final String filePath = f.getCanonicalPath();
if (DEBUG) {
Log.i(TAG, "storing: " + filePath);
}
FullBackup.backupToTar(packageName, FullBackup.OBB_TREE_TOKEN, null,
rootPath, filePath, out);
}
}
}
}
} catch (IOException e) {
Log.w(TAG, "Exception backing up OBBs for " + packageName, e);
} finally {
// Send the EOD marker indicating that there is no more data
try {
FileOutputStream out = new FileOutputStream(outFd);
byte[] buf = new byte[4];
out.write(buf);
} catch (IOException e) {
Log.e(TAG, "Unable to finalize obb backup stream!");
}
try {
callbackBinder.opComplete(token, 0);
} catch (RemoteException e) {
}
}
}
/*
* Restore an OBB file for the given package from the incoming stream
*/
@Override
public void restoreObbFile(String packageName, ParcelFileDescriptor data,
long fileSize, int type, String path, long mode, long mtime,
int token, IBackupManager callbackBinder) {
try {
File outFile = Environment.buildExternalStorageAppObbDirs(packageName)[0];
if (outFile != null) {
outFile = new File(outFile, path);
}
// outFile is null here if we couldn't get access to external storage,
// in which case restoreFile() will discard the data cleanly and let
// us proceed with the next file segment in the stream. We pass -1
// for the file mode to suppress attempts to chmod() on shared storage.
FullBackup.restoreFile(data, fileSize, type, -1, mtime, outFile);
} catch (IOException e) {
Log.i(TAG, "Exception restoring OBB " + path, e);
} finally {
try {
callbackBinder.opComplete(token, 0);
} catch (RemoteException e) {
}
}
}
ArrayList<File> allFileContents(File rootDir) {
final ArrayList<File> files = new ArrayList<File>();
final ArrayList<File> dirs = new ArrayList<File>();
dirs.add(rootDir);
while (!dirs.isEmpty()) {
File dir = dirs.remove(0);
File[] contents = dir.listFiles();
if (contents != null) {
for (File f : contents) {
if (f.isDirectory()) dirs.add(f);
else if (f.isFile()) files.add(f);
}
}
}
return files;
}
};
@Override
public IBinder onBind(Intent intent) {
return mService.asBinder();
}
}
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