| /* |
| * Copyright (C) 2007 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.providers.settings; |
| |
| import java.io.FileNotFoundException; |
| |
| import android.backup.IBackupManager; |
| import android.content.ContentProvider; |
| import android.content.ContentUris; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.database.Cursor; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.database.sqlite.SQLiteQueryBuilder; |
| import android.media.RingtoneManager; |
| import android.net.Uri; |
| import android.os.ParcelFileDescriptor; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.provider.DrmStore; |
| import android.provider.MediaStore; |
| import android.provider.Settings; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| public class SettingsProvider extends ContentProvider { |
| private static final String TAG = "SettingsProvider"; |
| private static final boolean LOCAL_LOGV = false; |
| |
| private static final String TABLE_FAVORITES = "favorites"; |
| private static final String TABLE_OLD_FAVORITES = "old_favorites"; |
| |
| private DatabaseHelper mOpenHelper; |
| |
| /** |
| * Decode a content URL into the table, projection, and arguments |
| * used to access the corresponding database rows. |
| */ |
| private static class SqlArguments { |
| public String table; |
| public final String where; |
| public final String[] args; |
| |
| /** Operate on existing rows. */ |
| SqlArguments(Uri url, String where, String[] args) { |
| if (url.getPathSegments().size() == 1) { |
| this.table = url.getPathSegments().get(0); |
| this.where = where; |
| this.args = args; |
| } else if (url.getPathSegments().size() != 2) { |
| throw new IllegalArgumentException("Invalid URI: " + url); |
| } else if (!TextUtils.isEmpty(where)) { |
| throw new UnsupportedOperationException("WHERE clause not supported: " + url); |
| } else { |
| this.table = url.getPathSegments().get(0); |
| if ("gservices".equals(this.table) || "system".equals(this.table) |
| || "secure".equals(this.table)) { |
| this.where = Settings.NameValueTable.NAME + "=?"; |
| this.args = new String[] { url.getPathSegments().get(1) }; |
| } else { |
| this.where = "_id=" + ContentUris.parseId(url); |
| this.args = null; |
| } |
| } |
| } |
| |
| /** Insert new rows (no where clause allowed). */ |
| SqlArguments(Uri url) { |
| if (url.getPathSegments().size() == 1) { |
| this.table = url.getPathSegments().get(0); |
| this.where = null; |
| this.args = null; |
| } else { |
| throw new IllegalArgumentException("Invalid URI: " + url); |
| } |
| } |
| } |
| |
| /** |
| * Get the content URI of a row added to a table. |
| * @param tableUri of the entire table |
| * @param values found in the row |
| * @param rowId of the row |
| * @return the content URI for this particular row |
| */ |
| private Uri getUriFor(Uri tableUri, ContentValues values, long rowId) { |
| if (tableUri.getPathSegments().size() != 1) { |
| throw new IllegalArgumentException("Invalid URI: " + tableUri); |
| } |
| String table = tableUri.getPathSegments().get(0); |
| if ("gservices".equals(table) || "system".equals(table) |
| || "secure".equals(table)) { |
| String name = values.getAsString(Settings.NameValueTable.NAME); |
| return Uri.withAppendedPath(tableUri, name); |
| } else { |
| return ContentUris.withAppendedId(tableUri, rowId); |
| } |
| } |
| |
| /** |
| * Send a notification when a particular content URI changes. |
| * Modify the system property used to communicate the version of |
| * this table, for tables which have such a property. (The Settings |
| * contract class uses these to provide client-side caches.) |
| * @param uri to send notifications for |
| */ |
| private void sendNotify(Uri uri) { |
| // Update the system property *first*, so if someone is listening for |
| // a notification and then using the contract class to get their data, |
| // the system property will be updated and they'll get the new data. |
| |
| String property = null, table = uri.getPathSegments().get(0); |
| if (table.equals("system")) { |
| property = Settings.System.SYS_PROP_SETTING_VERSION; |
| } else if (table.equals("secure")) { |
| property = Settings.Secure.SYS_PROP_SETTING_VERSION; |
| } else if (table.equals("gservices")) { |
| property = Settings.Gservices.SYS_PROP_SETTING_VERSION; |
| } |
| |
| if (property != null) { |
| long version = SystemProperties.getLong(property, 0) + 1; |
| if (LOCAL_LOGV) Log.v(TAG, "property: " + property + "=" + version); |
| SystemProperties.set(property, Long.toString(version)); |
| } |
| |
| // Inform the backup manager about a data change |
| IBackupManager ibm = IBackupManager.Stub.asInterface( |
| ServiceManager.getService(Context.BACKUP_SERVICE)); |
| if (ibm != null) { |
| try { |
| ibm.dataChanged(getContext().getPackageName()); |
| } catch (Exception e) { |
| // Try again later |
| } |
| } |
| |
| // Now send the notification through the content framework. |
| |
| String notify = uri.getQueryParameter("notify"); |
| if (notify == null || "true".equals(notify)) { |
| getContext().getContentResolver().notifyChange(uri, null); |
| if (LOCAL_LOGV) Log.v(TAG, "notifying: " + uri); |
| } else { |
| if (LOCAL_LOGV) Log.v(TAG, "notification suppressed: " + uri); |
| } |
| } |
| |
| /** |
| * Make sure the caller has permission to write this data. |
| * @param args supplied by the caller |
| * @throws SecurityException if the caller is forbidden to write. |
| */ |
| private void checkWritePermissions(SqlArguments args) { |
| if ("secure".equals(args.table) && |
| getContext().checkCallingOrSelfPermission( |
| android.Manifest.permission.WRITE_SECURE_SETTINGS) != |
| PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException( |
| String.format("Permission denial: writing to secure settings requires %1$s", |
| android.Manifest.permission.WRITE_SECURE_SETTINGS)); |
| |
| // TODO: Move gservices into its own provider so we don't need this nonsense. |
| } else if ("gservices".equals(args.table) && |
| getContext().checkCallingOrSelfPermission( |
| android.Manifest.permission.WRITE_GSERVICES) != |
| PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException( |
| String.format("Permission denial: writing to gservices settings requires %1$s", |
| android.Manifest.permission.WRITE_GSERVICES)); |
| } |
| } |
| |
| @Override |
| public boolean onCreate() { |
| mOpenHelper = new DatabaseHelper(getContext()); |
| return true; |
| } |
| |
| @Override |
| public Cursor query(Uri url, String[] select, String where, String[] whereArgs, String sort) { |
| SqlArguments args = new SqlArguments(url, where, whereArgs); |
| SQLiteDatabase db = mOpenHelper.getReadableDatabase(); |
| |
| // The favorites table was moved from this provider to a provider inside Home |
| // Home still need to query this table to upgrade from pre-cupcake builds |
| // However, a cupcake+ build with no data does not contain this table which will |
| // cause an exception in the SQL stack. The following line is a special case to |
| // let the caller of the query have a chance to recover and avoid the exception |
| if (TABLE_FAVORITES.equals(args.table)) { |
| return null; |
| } else if (TABLE_OLD_FAVORITES.equals(args.table)) { |
| args.table = TABLE_FAVORITES; |
| Cursor cursor = db.rawQuery("PRAGMA table_info(favorites);", null); |
| if (cursor != null) { |
| boolean exists = cursor.getCount() > 0; |
| cursor.close(); |
| if (!exists) return null; |
| } else { |
| return null; |
| } |
| } |
| |
| SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); |
| qb.setTables(args.table); |
| |
| Cursor ret = qb.query(db, select, args.where, args.args, null, null, sort); |
| ret.setNotificationUri(getContext().getContentResolver(), url); |
| return ret; |
| } |
| |
| @Override |
| public String getType(Uri url) { |
| // If SqlArguments supplies a where clause, then it must be an item |
| // (because we aren't supplying our own where clause). |
| SqlArguments args = new SqlArguments(url, null, null); |
| if (TextUtils.isEmpty(args.where)) { |
| return "vnd.android.cursor.dir/" + args.table; |
| } else { |
| return "vnd.android.cursor.item/" + args.table; |
| } |
| } |
| |
| @Override |
| public int bulkInsert(Uri uri, ContentValues[] values) { |
| SqlArguments args = new SqlArguments(uri); |
| if (TABLE_FAVORITES.equals(args.table)) { |
| return 0; |
| } |
| checkWritePermissions(args); |
| |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| db.beginTransaction(); |
| try { |
| int numValues = values.length; |
| for (int i = 0; i < numValues; i++) { |
| if (db.insert(args.table, null, values[i]) < 0) return 0; |
| if (LOCAL_LOGV) Log.v(TAG, args.table + " <- " + values[i]); |
| } |
| db.setTransactionSuccessful(); |
| } finally { |
| db.endTransaction(); |
| } |
| |
| sendNotify(uri); |
| return values.length; |
| } |
| |
| /* |
| * Used to parse changes to the value of Settings.Secure.LOCATION_PROVIDERS_ALLOWED. |
| * This setting contains a list of the currently enabled location providers. |
| * But helper functions in android.providers.Settings can enable or disable |
| * a single provider by using a "+" or "-" prefix before the provider name. |
| */ |
| private boolean parseProviderList(Uri url, ContentValues initialValues) { |
| String value = initialValues.getAsString(Settings.Secure.VALUE); |
| String newProviders = null; |
| if (value != null && value.length() > 1) { |
| char prefix = value.charAt(0); |
| if (prefix == '+' || prefix == '-') { |
| // skip prefix |
| value = value.substring(1); |
| |
| // read list of enabled providers into "providers" |
| String providers = ""; |
| String[] columns = {Settings.Secure.VALUE}; |
| String where = Settings.Secure.NAME + "=\'" + Settings.Secure.LOCATION_PROVIDERS_ALLOWED + "\'"; |
| Cursor cursor = query(url, columns, where, null, null); |
| if (cursor != null && cursor.getCount() == 1) { |
| try { |
| cursor.moveToFirst(); |
| providers = cursor.getString(0); |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| int index = providers.indexOf(value); |
| int end = index + value.length(); |
| // check for commas to avoid matching on partial string |
| if (index > 0 && providers.charAt(index - 1) != ',') index = -1; |
| if (end < providers.length() && providers.charAt(end) != ',') index = -1; |
| |
| if (prefix == '+' && index < 0) { |
| // append the provider to the list if not present |
| if (providers.length() == 0) { |
| newProviders = value; |
| } else { |
| newProviders = providers + ',' + value; |
| } |
| } else if (prefix == '-' && index >= 0) { |
| // remove the provider from the list if present |
| // remove leading and trailing commas |
| if (index > 0) index--; |
| if (end < providers.length()) end++; |
| |
| newProviders = providers.substring(0, index); |
| if (end < providers.length()) { |
| newProviders += providers.substring(end); |
| } |
| } else { |
| // nothing changed, so no need to update the database |
| return false; |
| } |
| |
| if (newProviders != null) { |
| initialValues.put(Settings.Secure.VALUE, newProviders); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public Uri insert(Uri url, ContentValues initialValues) { |
| SqlArguments args = new SqlArguments(url); |
| if (TABLE_FAVORITES.equals(args.table)) { |
| return null; |
| } |
| checkWritePermissions(args); |
| |
| // Special case LOCATION_PROVIDERS_ALLOWED. |
| // Support enabling/disabling a single provider (using "+" or "-" prefix) |
| String name = initialValues.getAsString(Settings.Secure.NAME); |
| if (Settings.Secure.LOCATION_PROVIDERS_ALLOWED.equals(name)) { |
| if (!parseProviderList(url, initialValues)) return null; |
| } |
| |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| final long rowId = db.insert(args.table, null, initialValues); |
| if (rowId <= 0) return null; |
| |
| if (LOCAL_LOGV) Log.v(TAG, args.table + " <- " + initialValues); |
| url = getUriFor(url, initialValues, rowId); |
| sendNotify(url); |
| return url; |
| } |
| |
| @Override |
| public int delete(Uri url, String where, String[] whereArgs) { |
| SqlArguments args = new SqlArguments(url, where, whereArgs); |
| if (TABLE_FAVORITES.equals(args.table)) { |
| return 0; |
| } else if (TABLE_OLD_FAVORITES.equals(args.table)) { |
| args.table = TABLE_FAVORITES; |
| } |
| checkWritePermissions(args); |
| |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| int count = db.delete(args.table, args.where, args.args); |
| if (count > 0) sendNotify(url); |
| if (LOCAL_LOGV) Log.v(TAG, args.table + ": " + count + " row(s) deleted"); |
| return count; |
| } |
| |
| @Override |
| public int update(Uri url, ContentValues initialValues, String where, String[] whereArgs) { |
| SqlArguments args = new SqlArguments(url, where, whereArgs); |
| if (TABLE_FAVORITES.equals(args.table)) { |
| return 0; |
| } |
| checkWritePermissions(args); |
| |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| int count = db.update(args.table, initialValues, args.where, args.args); |
| if (count > 0) sendNotify(url); |
| if (LOCAL_LOGV) Log.v(TAG, args.table + ": " + count + " row(s) <- " + initialValues); |
| return count; |
| } |
| |
| @Override |
| public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { |
| |
| /* |
| * When a client attempts to openFile the default ringtone or |
| * notification setting Uri, we will proxy the call to the current |
| * default ringtone's Uri (if it is in the DRM or media provider). |
| */ |
| int ringtoneType = RingtoneManager.getDefaultType(uri); |
| // Above call returns -1 if the Uri doesn't match a default type |
| if (ringtoneType != -1) { |
| Context context = getContext(); |
| |
| // Get the current value for the default sound |
| Uri soundUri = RingtoneManager.getActualDefaultRingtoneUri(context, ringtoneType); |
| if (soundUri == null) { |
| // Fallback on any valid ringtone Uri |
| soundUri = RingtoneManager.getValidRingtoneUri(context); |
| } |
| |
| if (soundUri != null) { |
| // Only proxy the openFile call to drm or media providers |
| String authority = soundUri.getAuthority(); |
| boolean isDrmAuthority = authority.equals(DrmStore.AUTHORITY); |
| if (isDrmAuthority || authority.equals(MediaStore.AUTHORITY)) { |
| |
| if (isDrmAuthority) { |
| try { |
| // Check DRM access permission here, since once we |
| // do the below call the DRM will be checking our |
| // permission, not our caller's permission |
| DrmStore.enforceAccessDrmPermission(context); |
| } catch (SecurityException e) { |
| throw new FileNotFoundException(e.getMessage()); |
| } |
| } |
| |
| return context.getContentResolver().openFileDescriptor(soundUri, mode); |
| } |
| } |
| } |
| |
| return super.openFile(uri, mode); |
| } |
| } |