| /* |
| * Copyright (C) 2012 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.downloads; |
| |
| import static android.app.DownloadManager.COLUMN_LOCAL_FILENAME; |
| import static android.app.DownloadManager.COLUMN_MEDIA_TYPE; |
| import static android.app.DownloadManager.COLUMN_URI; |
| import static android.provider.Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI; |
| |
| import static com.android.providers.downloads.Constants.TAG; |
| |
| import android.app.DownloadManager; |
| import android.content.ActivityNotFoundException; |
| import android.content.ContentUris; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageInstaller; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.Process; |
| import android.provider.DocumentsContract; |
| import android.provider.Downloads.Impl.RequestHeaders; |
| import android.util.Log; |
| |
| import java.io.File; |
| |
| public class OpenHelper { |
| /** |
| * Build and start an {@link Intent} to view the download with given ID, |
| * handling subtleties around installing packages. |
| */ |
| public static boolean startViewIntent(Context context, long id, int intentFlags) { |
| final Intent intent = OpenHelper.buildViewIntent(context, id); |
| if (intent == null) { |
| Log.w(TAG, "No intent built for " + id); |
| return false; |
| } |
| |
| intent.addFlags(intentFlags); |
| try { |
| context.startActivity(intent); |
| return true; |
| } catch (ActivityNotFoundException e) { |
| Log.w(TAG, "Failed to start " + intent + ": " + e); |
| return false; |
| } |
| } |
| |
| /** |
| * Build an {@link Intent} to view the download with given ID, handling |
| * subtleties around installing packages. |
| */ |
| private static Intent buildViewIntent(Context context, long id) { |
| final DownloadManager downManager = (DownloadManager) context.getSystemService( |
| Context.DOWNLOAD_SERVICE); |
| downManager.setAccessAllDownloads(true); |
| downManager.setAccessFilename(true); |
| |
| final Cursor cursor = downManager.query(new DownloadManager.Query().setFilterById(id)); |
| try { |
| if (!cursor.moveToFirst()) { |
| return null; |
| } |
| |
| final File file = getCursorFile(cursor, COLUMN_LOCAL_FILENAME); |
| String mimeType = getCursorString(cursor, COLUMN_MEDIA_TYPE); |
| mimeType = DownloadDrmHelper.getOriginalMimeType(context, file, mimeType); |
| |
| final Uri documentUri = DocumentsContract.buildDocumentUri( |
| Constants.STORAGE_AUTHORITY, String.valueOf(id)); |
| |
| final Intent intent = new Intent(Intent.ACTION_VIEW); |
| intent.setDataAndType(documentUri, mimeType); |
| intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION |
| | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); |
| |
| if ("application/vnd.android.package-archive".equals(mimeType)) { |
| // Also splice in details about where it came from |
| final Uri remoteUri = getCursorUri(cursor, COLUMN_URI); |
| intent.putExtra(Intent.EXTRA_ORIGINATING_URI, remoteUri); |
| intent.putExtra(Intent.EXTRA_REFERRER, getRefererUri(context, id)); |
| intent.putExtra(Intent.EXTRA_ORIGINATING_UID, getOriginatingUid(context, id)); |
| } |
| |
| return intent; |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| private static Uri getRefererUri(Context context, long id) { |
| final Uri headersUri = Uri.withAppendedPath( |
| ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id), |
| RequestHeaders.URI_SEGMENT); |
| final Cursor headers = context.getContentResolver() |
| .query(headersUri, null, null, null, null); |
| try { |
| while (headers.moveToNext()) { |
| final String header = getCursorString(headers, RequestHeaders.COLUMN_HEADER); |
| if ("Referer".equalsIgnoreCase(header)) { |
| return getCursorUri(headers, RequestHeaders.COLUMN_VALUE); |
| } |
| } |
| } finally { |
| headers.close(); |
| } |
| return null; |
| } |
| |
| private static int getOriginatingUid(Context context, long id) { |
| final Uri uri = ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id); |
| final Cursor cursor = context.getContentResolver().query(uri, new String[]{Constants.UID}, |
| null, null, null); |
| if (cursor != null) { |
| try { |
| if (cursor.moveToFirst()) { |
| final int uid = cursor.getInt(cursor.getColumnIndexOrThrow(Constants.UID)); |
| if (uid != Process.myUid()) { |
| return uid; |
| } |
| } |
| } finally { |
| cursor.close(); |
| } |
| } |
| return PackageInstaller.SessionParams.UID_UNKNOWN; |
| } |
| |
| private static String getCursorString(Cursor cursor, String column) { |
| return cursor.getString(cursor.getColumnIndexOrThrow(column)); |
| } |
| |
| private static Uri getCursorUri(Cursor cursor, String column) { |
| return Uri.parse(getCursorString(cursor, column)); |
| } |
| |
| private static File getCursorFile(Cursor cursor, String column) { |
| return new File(cursor.getString(cursor.getColumnIndexOrThrow(column))); |
| } |
| } |