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/*
* 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 org.apg.provider;
import org.apg.ApgService;
import org.apg.Constants;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.List;
import java.util.UUID;
public class ApgServiceBlobProvider extends ContentProvider {
private static final String TAG = "ApgServiceBlobProvider";
public static final Uri CONTENT_URI = Uri.parse("content://org.apg.provider.apgserviceblobprovider");
private static final String COLUMN_KEY = "key";
private static final String STORE_PATH = Constants.path.APP_DIR+"/ApgServiceBlobs";
private ApgServiceBlobDatabase mDb = null;
public ApgServiceBlobProvider() {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor called");
File dir = new File(STORE_PATH);
dir.mkdirs();
if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor finished");
}
@Override
public int delete(Uri arg0, String arg1, String[] arg2) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "delete() called");
// TODO Auto-generated method stub
return 0;
}
@Override
public String getType(Uri arg0) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "getType() called");
// not needed for now
return null;
}
@Override
public Uri insert(Uri uri, ContentValues ignored) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "insert() called");
// ContentValues are actually ignored, because we want to store a blob with no more information
// but have to create an record with the password generated here first
ContentValues vals = new ContentValues();
// Insert a random key in the database. This has to provided by the caller when updating or
// getting the blob
String password = UUID.randomUUID().toString();
vals.put(COLUMN_KEY, password);
Uri insertedUri = mDb.insert(vals);
return Uri.withAppendedPath(insertedUri, password);
}
@Override
public boolean onCreate() {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "onCreate() called");
mDb = new ApgServiceBlobDatabase(getContext());
// TODO Auto-generated method stub
return true;
}
@Override
public Cursor query(Uri arg0, String[] arg1, String arg2, String[] arg3, String arg4) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "query() called");
// TODO Auto-generated method stub
return null;
}
@Override
public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "update() called");
// TODO Auto-generated method stub
return 0;
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws SecurityException, FileNotFoundException {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "openFile() called");
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with uri: "+uri.toString());
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with mode: "+mode);
List<String> segments = uri.getPathSegments();
if(segments.size() < 2) {
throw new SecurityException("Password not found in URI");
}
String id = segments.get(0);
String key = segments.get(1);
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... got id: "+id);
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... and key: "+key);
// get the data
Cursor result = mDb.query(id, key);
if(result.getCount() == 0) {
// either the key is wrong or no id exists
throw new FileNotFoundException("No file found with that ID and/or password");
}
File targetFile = new File(STORE_PATH, id);
if(mode.equals("w")) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file w");
if( !targetFile.exists() ) {
try {
targetFile.createNewFile();
} catch (IOException e) {
Log.e(TAG, "... got IEOException on creating new file", e);
throw new FileNotFoundException("Could not create file to write to");
}
}
return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_WRITE_ONLY | ParcelFileDescriptor.MODE_TRUNCATE );
} else if(mode.equals("r")) {
if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file r");
if( !targetFile.exists() ) {
throw new FileNotFoundException("Error: Could not find the file requested");
}
return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_READ_ONLY);
}
return null;
}
}
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