Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 1 | package com.android.internal.backup; |
| 2 | |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 3 | import android.backup.BackupDataInput; |
Christopher Tate | 8e55eac9 | 2009-06-15 12:31:20 -0700 | [diff] [blame] | 4 | import android.backup.BackupDataOutput; |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 5 | import android.backup.RestoreSet; |
| 6 | import android.content.Context; |
| 7 | import android.content.pm.PackageInfo; |
| 8 | import android.content.pm.PackageManager; |
| 9 | import android.content.pm.PackageManager.NameNotFoundException; |
| 10 | import android.os.Environment; |
| 11 | import android.os.ParcelFileDescriptor; |
| 12 | import android.os.RemoteException; |
| 13 | import android.util.Log; |
| 14 | |
Christopher Tate | e9190a2 | 2009-06-17 17:52:05 -0700 | [diff] [blame^] | 15 | import org.bouncycastle.util.encoders.Base64; |
| 16 | |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 17 | import java.io.File; |
| 18 | import java.io.FileFilter; |
| 19 | import java.io.FileInputStream; |
| 20 | import java.io.FileOutputStream; |
| 21 | import java.io.IOException; |
| 22 | import java.util.ArrayList; |
| 23 | |
| 24 | /** |
| 25 | * Backup transport for stashing stuff into a known location on disk, and |
| 26 | * later restoring from there. For testing only. |
| 27 | */ |
| 28 | |
| 29 | public class LocalTransport extends IBackupTransport.Stub { |
| 30 | private static final String TAG = "LocalTransport"; |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 31 | private static final boolean DEBUG = true; |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 32 | |
| 33 | private Context mContext; |
| 34 | private PackageManager mPackageManager; |
| 35 | private File mDataDir = new File(Environment.getDownloadCacheDirectory(), "backup"); |
| 36 | private FileFilter mDirFileFilter = new FileFilter() { |
| 37 | public boolean accept(File f) { |
| 38 | return f.isDirectory(); |
| 39 | } |
| 40 | }; |
| 41 | |
| 42 | |
| 43 | public LocalTransport(Context context) { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 44 | if (DEBUG) Log.v(TAG, "Transport constructed"); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 45 | mContext = context; |
| 46 | mPackageManager = context.getPackageManager(); |
| 47 | } |
| 48 | |
| 49 | public long requestBackupTime() throws RemoteException { |
| 50 | // any time is a good time for local backup |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | public int startSession() throws RemoteException { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 55 | if (DEBUG) Log.v(TAG, "session started"); |
| 56 | mDataDir.mkdirs(); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | public int endSession() throws RemoteException { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 61 | if (DEBUG) Log.v(TAG, "session ended"); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | public int performBackup(PackageInfo packageInfo, ParcelFileDescriptor data) |
| 66 | throws RemoteException { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 67 | if (DEBUG) Log.v(TAG, "performBackup() pkg=" + packageInfo.packageName); |
| 68 | int err = 0; |
| 69 | |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 70 | File packageDir = new File(mDataDir, packageInfo.packageName); |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 71 | packageDir.mkdirs(); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 72 | |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 73 | // Each 'record' in the restore set is kept in its own file, named by |
| 74 | // the record key. Wind through the data file, extracting individual |
| 75 | // record operations and building a set of all the updates to apply |
| 76 | // in this update. |
| 77 | BackupDataInput changeSet = new BackupDataInput(data.getFileDescriptor()); |
| 78 | try { |
| 79 | int bufSize = 512; |
| 80 | byte[] buf = new byte[bufSize]; |
| 81 | while (changeSet.readNextHeader()) { |
| 82 | String key = changeSet.getKey(); |
| 83 | int dataSize = changeSet.getDataSize(); |
Christopher Tate | e9190a2 | 2009-06-17 17:52:05 -0700 | [diff] [blame^] | 84 | |
| 85 | String base64Key = new String(Base64.encode(key.getBytes())); |
| 86 | if (DEBUG) Log.v(TAG, "Got change set key=" + key + " size=" + dataSize |
| 87 | + " key64=" + base64Key); |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 88 | if (dataSize > bufSize) { |
| 89 | bufSize = dataSize; |
| 90 | buf = new byte[bufSize]; |
| 91 | } |
Joe Onorato | 5f15d15 | 2009-06-16 16:31:35 -0400 | [diff] [blame] | 92 | changeSet.readEntityData(buf, 0, dataSize); |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 93 | if (DEBUG) Log.v(TAG, " + data size " + dataSize); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 94 | |
Christopher Tate | e9190a2 | 2009-06-17 17:52:05 -0700 | [diff] [blame^] | 95 | File entityFile = new File(packageDir, base64Key); |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 96 | FileOutputStream entity = new FileOutputStream(entityFile); |
| 97 | try { |
| 98 | entity.write(buf, 0, dataSize); |
| 99 | } catch (IOException e) { |
| 100 | Log.e(TAG, "Unable to update key file " |
| 101 | + entityFile.getAbsolutePath()); |
| 102 | err = -1; |
| 103 | } finally { |
| 104 | entity.close(); |
| 105 | } |
| 106 | } |
| 107 | } catch (IOException e) { |
| 108 | // oops, something went wrong. abort the operation and return error. |
| 109 | Log.v(TAG, "Exception reading backup input:"); |
| 110 | e.printStackTrace(); |
| 111 | err = -1; |
| 112 | } |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 113 | |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 114 | return err; |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | // Restore handling |
| 118 | public RestoreSet[] getAvailableRestoreSets() throws android.os.RemoteException { |
| 119 | // one hardcoded restore set |
Christopher Tate | f68eb50 | 2009-06-16 11:02:01 -0700 | [diff] [blame] | 120 | RestoreSet set = new RestoreSet("Local disk image", "flash", 0); |
| 121 | RestoreSet[] array = { set }; |
| 122 | return array; |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | public PackageInfo[] getAppSet(int token) throws android.os.RemoteException { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 126 | if (DEBUG) Log.v(TAG, "getting app set " + token); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 127 | // the available packages are the extant subdirs of mDatadir |
| 128 | File[] packageDirs = mDataDir.listFiles(mDirFileFilter); |
| 129 | ArrayList<PackageInfo> packages = new ArrayList<PackageInfo>(); |
| 130 | for (File dir : packageDirs) { |
| 131 | try { |
| 132 | PackageInfo pkg = mPackageManager.getPackageInfo(dir.getName(), |
| 133 | PackageManager.GET_SIGNATURES); |
| 134 | if (pkg != null) { |
| 135 | packages.add(pkg); |
| 136 | } |
| 137 | } catch (NameNotFoundException e) { |
| 138 | // restore set contains data for a package not installed on the |
| 139 | // phone -- just ignore it. |
| 140 | } |
| 141 | } |
| 142 | |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 143 | if (DEBUG) { |
| 144 | Log.v(TAG, "Built app set of " + packages.size() + " entries:"); |
| 145 | for (PackageInfo p : packages) { |
| 146 | Log.v(TAG, " + " + p.packageName); |
| 147 | } |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | PackageInfo[] result = new PackageInfo[packages.size()]; |
| 151 | return packages.toArray(result); |
| 152 | } |
| 153 | |
Christopher Tate | 8e55eac9 | 2009-06-15 12:31:20 -0700 | [diff] [blame] | 154 | public int getRestoreData(int token, PackageInfo packageInfo, ParcelFileDescriptor outFd) |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 155 | throws android.os.RemoteException { |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 156 | if (DEBUG) Log.v(TAG, "getting restore data " + token + " : " + packageInfo.packageName); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 157 | // we only support one hardcoded restore set |
| 158 | if (token != 0) return -1; |
| 159 | |
| 160 | // the data for a given package is at a known location |
| 161 | File packageDir = new File(mDataDir, packageInfo.packageName); |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 162 | |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 163 | // The restore set is the concatenation of the individual record blobs, |
| 164 | // each of which is a file in the package's directory |
| 165 | File[] blobs = packageDir.listFiles(); |
| 166 | int err = 0; |
| 167 | if (blobs != null && blobs.length > 0) { |
Joe Onorato | 83248c4 | 2009-06-17 17:55:20 -0700 | [diff] [blame] | 168 | BackupDataOutput out = new BackupDataOutput(outFd.getFileDescriptor()); |
Christopher Tate | 8e55eac9 | 2009-06-15 12:31:20 -0700 | [diff] [blame] | 169 | try { |
| 170 | for (File f : blobs) { |
| 171 | FileInputStream in = new FileInputStream(f); |
| 172 | int size = (int) f.length(); |
| 173 | byte[] buf = new byte[size]; |
| 174 | in.read(buf); |
| 175 | out.writeEntityHeader(f.getName(), size); |
| 176 | out.writeEntityData(buf, size); |
| 177 | } |
| 178 | } catch (Exception e) { |
| 179 | Log.e(TAG, "Unable to read backup records"); |
| 180 | err = -1; |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 181 | } |
| 182 | } |
Christopher Tate | 2fdd428 | 2009-06-12 15:20:04 -0700 | [diff] [blame] | 183 | return err; |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 184 | } |
Christopher Tate | 9bbc21a | 2009-06-10 20:23:25 -0700 | [diff] [blame] | 185 | } |