| /* |
| * Copyright (C) 2013 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.launcher3; |
| |
| import com.android.launcher3.backup.BackupProtos.CheckedMessage; |
| import com.android.launcher3.backup.BackupProtos.Favorite; |
| import com.android.launcher3.backup.BackupProtos.Key; |
| import com.android.launcher3.backup.BackupProtos.Journal; |
| import com.android.launcher3.backup.BackupProtos.Resource; |
| import com.android.launcher3.backup.BackupProtos.Screen; |
| import com.android.launcher3.backup.BackupProtos.Widget; |
| |
| import com.google.protobuf.nano.InvalidProtocolBufferNanoException; |
| import com.google.protobuf.nano.MessageNano; |
| |
| import java.io.BufferedInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.lang.System; |
| import java.util.zip.CRC32; |
| |
| /** |
| * Commandline utility for decoding protos written to the android logs during debugging. |
| * |
| * base64 -D icon.log > icon.bin |
| * java -classpath $ANDROID_HOST_OUT/framework/protoutil.jar:$ANDROID_HOST_OUT/../common/obj/JAVA_LIBRARIES/host-libprotobuf-java-2.3.0-nano_intermediates/javalib.jar \ |
| * com.android.launcher3.DecoderRing -i icon.bin |
| * |
| * TODO: write a wrapper to setup the classpath |
| */ |
| class DecoderRing { |
| public static void main(String[ ] args) |
| throws Exception { |
| File source = null; |
| Class type = Key.class; |
| int skip = 0; |
| |
| for (int i = 0; i < args.length; i++) { |
| if ("-k".equals(args[i])) { |
| type = Key.class; |
| } else if ("-f".equals(args[i])) { |
| type = Favorite.class; |
| } else if ("-j".equals(args[i])) { |
| type = Journal.class; |
| } else if ("-i".equals(args[i])) { |
| type = Resource.class; |
| } else if ("-s".equals(args[i])) { |
| type = Screen.class; |
| } else if ("-w".equals(args[i])) { |
| type = Widget.class; |
| } else if ("-S".equals(args[i])) { |
| if ((i + 1) < args.length) { |
| skip = Integer.valueOf(args[++i]); |
| } else { |
| usage(args); |
| } |
| } else if (args[i] != null && !args[i].startsWith("-")) { |
| source = new File(args[i]); |
| } else { |
| System.err.println("Unsupported flag: " + args[i]); |
| usage(args); |
| } |
| } |
| |
| |
| // read in the bytes |
| ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); |
| BufferedInputStream input = null; |
| if (source == null) { |
| input = new BufferedInputStream(System.in); |
| } else { |
| try { |
| input = new BufferedInputStream(new FileInputStream(source)); |
| } catch (FileNotFoundException e) { |
| System.err.println("failed to open file: " + source + ", " + e); |
| System.exit(1); |
| } |
| } |
| byte[] buffer = new byte[1024]; |
| try { |
| while (input.available() > 0) { |
| int n = input.read(buffer); |
| int offset = 0; |
| if (skip > 0) { |
| offset = Math.min(skip, n); |
| n -= offset; |
| skip -= offset; |
| } |
| if (n > 0) { |
| byteStream.write(buffer, offset, n); |
| } |
| } |
| } catch (IOException e) { |
| System.err.println("failed to read input: " + e); |
| System.exit(1); |
| } |
| System.err.println("read this many bytes: " + byteStream.size()); |
| |
| MessageNano proto = null; |
| if (type == Key.class) { |
| Key key = new Key(); |
| try { |
| key = Key.parseFrom(byteStream.toByteArray()); |
| } catch (InvalidProtocolBufferNanoException e) { |
| System.err.println("failed to parse proto: " + e); |
| System.exit(1); |
| } |
| // keys are self-checked |
| if (key.checksum != checkKey(key)) { |
| System.err.println("key ckecksum failed"); |
| System.exit(1); |
| } |
| proto = key; |
| } else { |
| // other types are wrapped in a checksum message |
| CheckedMessage wrapper = new CheckedMessage(); |
| try { |
| MessageNano.mergeFrom(wrapper, byteStream.toByteArray()); |
| } catch (InvalidProtocolBufferNanoException e) { |
| System.err.println("failed to parse wrapper: " + e); |
| System.exit(1); |
| } |
| CRC32 checksum = new CRC32(); |
| checksum.update(wrapper.payload); |
| if (wrapper.checksum != checksum.getValue()) { |
| System.err.println("wrapper ckecksum failed"); |
| System.exit(1); |
| } |
| // decode the actual message |
| proto = (MessageNano) type.newInstance(); |
| try { |
| MessageNano.mergeFrom(proto, wrapper.payload); |
| } catch (InvalidProtocolBufferNanoException e) { |
| System.err.println("failed to parse proto: " + e); |
| System.exit(1); |
| } |
| } |
| |
| // Generic string output |
| System.out.println(proto.toString()); |
| |
| // save off the icon bits in a file for inspection |
| if (proto instanceof Resource) { |
| Resource icon = (Resource) proto; |
| final String path = "icon.webp"; |
| FileOutputStream iconFile = new FileOutputStream(path); |
| iconFile.write(icon.data); |
| iconFile.close(); |
| System.err.println("wrote " + path); |
| } |
| |
| // save off the widget icon and preview bits in files for inspection |
| if (proto instanceof Widget) { |
| Widget widget = (Widget) proto; |
| if (widget.icon != null) { |
| final String path = "widget_icon.webp"; |
| FileOutputStream iconFile = new FileOutputStream(path); |
| iconFile.write(widget.icon.data); |
| iconFile.close(); |
| System.err.println("wrote " + path); |
| } |
| if (widget.preview != null) { |
| final String path = "widget_preview.webp"; |
| FileOutputStream iconFile = new FileOutputStream(path); |
| iconFile.write(widget.preview.data); |
| iconFile.close(); |
| System.err.println("wrote " + path); |
| } |
| } |
| |
| // success |
| System.exit(0); |
| } |
| |
| private static long checkKey(Key key) { |
| CRC32 checksum = new CRC32(); |
| checksum.update(key.type); |
| checksum.update((int) (key.id & 0xffff)); |
| checksum.update((int) ((key.id >> 32) & 0xffff)); |
| if (key.name != null && key.name.length() > 0) { |
| checksum.update(key.name.getBytes()); |
| } |
| return checksum.getValue(); |
| } |
| |
| private static void usage(String[] args) { |
| System.err.println("DecoderRing type [input]"); |
| System.err.println("\t-k\tdecode a key"); |
| System.err.println("\t-f\tdecode a favorite"); |
| System.err.println("\t-i\tdecode a icon"); |
| System.err.println("\t-s\tdecode a screen"); |
| System.err.println("\t-w\tdecode a widget"); |
| System.err.println("\t-s b\tskip b bytes"); |
| System.err.println("\tfilename\tread from filename, not stdin"); |
| System.exit(1); |
| } |
| } |