| /* |
| * Copyright (C) 2015 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.packageinstaller.wear; |
| |
| import android.content.Context; |
| import android.net.Uri; |
| import android.os.ParcelFileDescriptor; |
| import android.system.ErrnoException; |
| import android.system.Os; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import org.tukaani.xz.LZMAInputStream; |
| import org.tukaani.xz.XZInputStream; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class WearPackageUtil { |
| private static final String TAG = "WearablePkgInstaller"; |
| |
| private static final String COMPRESSION_LZMA = "lzma"; |
| private static final String COMPRESSION_XZ = "xz"; |
| |
| public static File getTemporaryFile(Context context, String packageName) { |
| try { |
| File newFileDir = new File(context.getFilesDir(), "tmp"); |
| newFileDir.mkdirs(); |
| Os.chmod(newFileDir.getAbsolutePath(), 0771); |
| File newFile = new File(newFileDir, packageName + ".apk"); |
| return newFile; |
| } catch (ErrnoException e) { |
| Log.e(TAG, "Failed to open.", e); |
| return null; |
| } |
| } |
| |
| public static File getIconFile(final Context context, final String packageName) { |
| try { |
| File newFileDir = new File(context.getFilesDir(), "images/icons"); |
| newFileDir.mkdirs(); |
| Os.chmod(newFileDir.getAbsolutePath(), 0771); |
| return new File(newFileDir, packageName + ".icon"); |
| } catch (ErrnoException e) { |
| Log.e(TAG, "Failed to open.", e); |
| return null; |
| } |
| } |
| |
| /** |
| * In order to make sure that the Wearable Asset Manager has a reasonable apk that can be used |
| * by the PackageManager, we will parse it before sending it to the PackageManager. |
| * Unfortunately, PackageParser needs a file to parse. So, we have to temporarily convert the fd |
| * to a File. |
| * |
| * @param context |
| * @param fd FileDescriptor to convert to File |
| * @param packageName Name of package, will define the name of the file |
| * @param compressionAlg Can be null. For ALT mode the APK will be compressed. We will |
| * decompress it here |
| */ |
| public static File getFileFromFd(Context context, ParcelFileDescriptor fd, |
| String packageName, String compressionAlg) { |
| File newFile = getTemporaryFile(context, packageName); |
| if (fd == null || fd.getFileDescriptor() == null) { |
| return null; |
| } |
| InputStream fr = new ParcelFileDescriptor.AutoCloseInputStream(fd); |
| try { |
| if (TextUtils.equals(compressionAlg, COMPRESSION_XZ)) { |
| fr = new XZInputStream(fr); |
| } else if (TextUtils.equals(compressionAlg, COMPRESSION_LZMA)) { |
| fr = new LZMAInputStream(fr); |
| } |
| } catch (IOException e) { |
| Log.e(TAG, "Compression was set to " + compressionAlg + ", but could not decode ", e); |
| return null; |
| } |
| |
| int nRead; |
| byte[] data = new byte[1024]; |
| try { |
| final FileOutputStream fo = new FileOutputStream(newFile); |
| while ((nRead = fr.read(data, 0, data.length)) != -1) { |
| fo.write(data, 0, nRead); |
| } |
| fo.flush(); |
| fo.close(); |
| Os.chmod(newFile.getAbsolutePath(), 0644); |
| return newFile; |
| } catch (IOException e) { |
| Log.e(TAG, "Reading from Asset FD or writing to temp file failed ", e); |
| return null; |
| } catch (ErrnoException e) { |
| Log.e(TAG, "Could not set permissions on file ", e); |
| return null; |
| } finally { |
| try { |
| fr.close(); |
| } catch (IOException e) { |
| Log.e(TAG, "Failed to close the file from FD ", e); |
| } |
| } |
| } |
| |
| /** |
| * @return com.google.com from expected formats like |
| * Uri: package:com.google.com, package:/com.google.com, package://com.google.com |
| */ |
| public static String getSanitizedPackageName(Uri packageUri) { |
| String packageName = packageUri.getEncodedSchemeSpecificPart(); |
| if (packageName != null) { |
| return packageName.replaceAll("^/+", ""); |
| } |
| return packageName; |
| } |
| } |