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/*
* 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_LOCAL_URI;
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 android.app.DownloadManager;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.Downloads.Impl.RequestHeaders;
public class OpenHelper {
/**
* Build an {@link Intent} to view the download at current {@link Cursor}
* position, handling subtleties around installing packages.
*/
public static Intent buildViewIntent(Context context, long id) {
final DownloadManager downManager = (DownloadManager) context.getSystemService(
Context.DOWNLOAD_SERVICE);
downManager.setAccessAllDownloads(true);
final Cursor cursor = downManager.query(new DownloadManager.Query().setFilterById(id));
try {
if (!cursor.moveToFirst()) {
throw new IllegalArgumentException("Missing download " + id);
}
final Uri localUri = getCursorUri(cursor, COLUMN_LOCAL_URI);
final String filename = getCursorString(cursor, COLUMN_LOCAL_FILENAME);
String mimeType = getCursorString(cursor, COLUMN_MEDIA_TYPE);
mimeType = DownloadDrmHelper.getOriginalMimeType(context, filename, mimeType);
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
if ("application/vnd.android.package-archive".equals(mimeType)) {
// PackageInstaller doesn't like content URIs, so open file
intent.setDataAndType(localUri, 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));
} else if ("file".equals(localUri.getScheme())) {
intent.setDataAndType(
ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id), mimeType);
} else {
intent.setDataAndType(localUri, mimeType);
}
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()) {
return cursor.getInt(cursor.getColumnIndexOrThrow(Constants.UID));
}
} finally {
cursor.close();
}
}
return -1;
}
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 long getCursorLong(Cursor cursor, String column) {
return cursor.getLong(cursor.getColumnIndexOrThrow(column));
}
}
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