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support multiple files and fix logcat smippets for launcher_protoutil

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plus some code cleanup

Change-Id: I09b4a6aedbb1251a65d379464d830da694d38a38
This commit is contained in:
Chris Wren
2013-12-18 14:11:40 -05:00
parent f6a22ada81
commit 2fd318246f
1 changed files with 171 additions and 136 deletions
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307
util/com/android/launcher3/DecoderRing.java
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@@ -15,7 +15,6 @@
*/
package com.android.launcher3;
import com.android.launcher3.backup.BackupProtos;
import com.android.launcher3.backup.BackupProtos.CheckedMessage;
import com.android.launcher3.backup.BackupProtos.Favorite;
import com.android.launcher3.backup.BackupProtos.Key;
@@ -35,6 +34,8 @@ import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.System;
import java.util.LinkedList;
import java.util.List;
import java.util.zip.CRC32;
import javax.xml.bind.DatatypeConverter;
@@ -46,7 +47,7 @@ import javax.xml.bind.DatatypeConverter;
* <P>When using com.android.internal.backup.LocalTransport, the file names are base64-encoded Key
* protocol buffers with a prefix, that have been base64-encoded again by the transport:
* <pre>
* echo TDpDQUlnL0pxVTVnOD0= | base64 -D | dd bs=1 skip=2 | base64 -D | launcher_protoutil -k
* echo "TDpDQUlnL0pxVTVnOD0=" | launcher_protoutil -k
* </pre>
*
* <P>This tool understands these file names and will use the embedded Key to detect the type and
@@ -56,13 +57,19 @@ import javax.xml.bind.DatatypeConverter;
* </pre>
*
* <P>With payload debugging enabled, base64-encoded protocol buffers will be written to the logs.
* Copy the encoded log snippet into a file, and specify the type explicitly:
* Copy the encoded snippet from the log, and specify the type explicitly, with the Logs flags:
* <pre>
* base64 -D icon.log > icon.bin
* launcher_protoutil -i icon.bin
* echo "CAEYLiCJ9JKsDw==" | launcher_protoutil -L -k
* </pre>
* For backup payloads it is more convenient to copy the log snippet to a file:
* <pre>
* launcher_protoutil -L -f favorite.log
* </pre>
*/
class DecoderRing {
public static final String STANDARD_IN = "**stdin**";
private static Class[] TYPES = {
Key.class,
Favorite.class,
@@ -74,24 +81,25 @@ class DecoderRing {
public static void main(String[ ] args)
throws Exception {
File source = null;
Class type = null;
Class defaultType = null;
boolean extractImages = false;
boolean fromLogs = false;
int skip = 0;
List<File> files = new LinkedList<File>();
for (int i = 0; i < args.length; i++) {
if ("-k".equals(args[i])) {
type = Key.class;
defaultType = Key.class;
} else if ("-f".equals(args[i])) {
type = Favorite.class;
defaultType = Favorite.class;
} else if ("-j".equals(args[i])) {
type = Journal.class;
defaultType = Journal.class;
} else if ("-i".equals(args[i])) {
type = Resource.class;
defaultType = Resource.class;
} else if ("-s".equals(args[i])) {
type = Screen.class;
defaultType = Screen.class;
} else if ("-w".equals(args[i])) {
type = Widget.class;
defaultType = Widget.class;
} else if ("-S".equals(args[i])) {
if ((i + 1) < args.length) {
skip = Integer.valueOf(args[++i]);
@@ -100,154 +108,180 @@ class DecoderRing {
}
} else if ("-x".equals(args[i])) {
extractImages = true;
} else if ("-L".equals(args[i])) {
fromLogs = true;
} else if (args[i] != null && !args[i].startsWith("-")) {
source = new File(args[i]);
files.add(new File(args[i]));
} else {
System.err.println("Unsupported flag: " + args[i]);
usage(args);
}
}
if (type == null) {
if (source == null) {
usage(args);
} else {
Key key = new Key();
try {
byte[] rawKey = DatatypeConverter.parseBase64Binary(source.getName());
if (rawKey[0] != 'L' || rawKey[1] != ':') {
System.err.println("you must specify the payload type. " +
source.getName() + " is not a launcher backup key.");
System.exit(1);
}
String encodedPayload = new String(rawKey, 2, rawKey.length - 2);
byte[] keyProtoData = DatatypeConverter.parseBase64Binary(encodedPayload);
key = Key.parseFrom(keyProtoData);
} catch (InvalidProtocolBufferNanoException protoException) {
System.err.println("failed to extract key from filename: " + protoException);
System.exit(1);
} catch (IllegalArgumentException base64Exception) {
System.err.println("failed to extract key from filename: " + base64Exception);
System.exit(1);
}
// keys are self-checked
if (key.checksum != checkKey(key)) {
System.err.println("key ckecksum failed");
System.exit(1);
}
type = TYPES[key.type];
System.err.println("This is a " + type.getSimpleName() + " backup");
}
if (defaultType == null && files.isEmpty()) {
// can't infer file type without the key
usage(args);
}
// read in the bytes
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
BufferedInputStream input = null;
if (source == null) {
input = new BufferedInputStream(System.in);
} else {
if (files.size() > 1) {
System.err.println("Explicit type ignored for multiple files.");
defaultType = null;
}
if (files.isEmpty()) {
files.add(new File(STANDARD_IN));
}
for (File source : files) {
Class type = null;
if (defaultType == null) {
Key key = decodeKey(source.getName().getBytes(), fromLogs);
type = TYPES[key.type];
System.err.println("This is a " + type.getSimpleName() + " backup");
} else {
type = defaultType;
}
// read in the bytes
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
BufferedInputStream input = null;
if (source.getName() == STANDARD_IN) {
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 {
input = new BufferedInputStream(new FileInputStream(source));
} catch (FileNotFoundException e) {
System.err.println("failed to open file: " + source + ", " + e);
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);
}
}
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;
MessageNano proto = null;
byte[] payload = byteStream.toByteArray();
if (type == Key.class) {
proto = decodeKey(payload, fromLogs);
} else {
proto = decodeBackupData(payload, type, fromLogs);
}
// Generic string output
System.out.println(proto.toString());
if (extractImages) {
String prefix = "stdin";
if (source != null) {
prefix = source.getName();
}
if (n > 0) {
byteStream.write(buffer, offset, n);
// save off the icon bits in a file for inspection
if (proto instanceof Resource) {
Resource icon = (Resource) proto;
writeImageData(icon.data, prefix + ".png");
}
// save off the icon bits in a file for inspection
if (proto instanceof Favorite) {
Favorite favorite = (Favorite) proto;
if (favorite.iconType == ICON_TYPE_BITMAP) {
writeImageData(favorite.icon, prefix + ".png");
}
}
// save off the widget icon and preview bits in files for inspection
if (proto instanceof Widget) {
Widget widget = (Widget) proto;
if (widget.icon != null) {
writeImageData(widget.icon.data, prefix + "_icon.png");
}
if (widget.preview != null) {
writeImageData(widget.preview.data, prefix + "_preview.png");
}
}
}
} catch (IOException e) {
System.err.println("failed to read input: " + e);
}
System.exit(0);
}
// In logcat, backup data is base64 encoded, but in localtransport files it is raw
private static MessageNano decodeBackupData(byte[] payload, Class type, boolean fromLogs)
throws InstantiationException, IllegalAccessException {
MessageNano proto;// other types are wrapped in a checksum message
CheckedMessage wrapper = new CheckedMessage();
try {
if (fromLogs) {
payload = DatatypeConverter.parseBase64Binary(new String(payload));
}
MessageNano.mergeFrom(wrapper, payload);
} catch (InvalidProtocolBufferNanoException e) {
System.err.println("failed to parse wrapper: " + e);
System.exit(1);
}
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 checksum 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 checksum 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);
}
CRC32 checksum = new CRC32();
checksum.update(wrapper.payload);
if (wrapper.checksum != checksum.getValue()) {
System.err.println("wrapper checksum failed");
System.exit(1);
}
// Generic string output
System.out.println(proto.toString());
// 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);
}
return proto;
}
if (extractImages) {
String prefix = "stdin";
if (source != null) {
prefix = source.getName();
}
// save off the icon bits in a file for inspection
if (proto instanceof Resource) {
Resource icon = (Resource) proto;
writeImageData(icon.data, prefix + ".png");
}
// save off the icon bits in a file for inspection
if (proto instanceof Favorite) {
Favorite favorite = (Favorite) proto;
if (favorite.iconType == ICON_TYPE_BITMAP) {
writeImageData(favorite.icon, prefix + ".png");
}
}
// save off the widget icon and preview bits in files for inspection
if (proto instanceof Widget) {
Widget widget = (Widget) proto;
if (widget.icon != null) {
writeImageData(widget.icon.data, prefix + "_icon.png");
}
if (widget.preview != null) {
writeImageData(widget.preview.data, prefix + "_preview.png");
// In logcat, keys are base64 encoded with no prefix.
// The localtransport adds a prefix and the base64 encodes the whole thing again.
private static Key decodeKey(byte[] payload, boolean fromLogs) {
Key key = new Key();
try {
String encodedKey = new String(payload);
if (!fromLogs) {
byte[] rawKey = DatatypeConverter.parseBase64Binary(encodedKey);
if (rawKey[0] != 'L' || rawKey[1] != ':') {
System.err.println(encodedKey + " is not a launcher backup key.");
System.exit(1);
}
encodedKey = new String(rawKey, 2, rawKey.length - 2);
}
byte[] keyProtoData = DatatypeConverter.parseBase64Binary(encodedKey);
key = Key.parseFrom(keyProtoData);
} catch (InvalidProtocolBufferNanoException protoException) {
System.err.println("failed to extract key from filename: " + protoException);
System.exit(1);
} catch (IllegalArgumentException base64Exception) {
System.err.println("failed to extract key from filename: " + base64Exception);
System.exit(1);
}
// success
System.exit(0);
// keys are self-checked
if (key.checksum != checkKey(key)) {
System.err.println("key ckecksum failed");
System.exit(1);
}
return key;
}
private static void writeImageData(byte[] data, String path) {
@@ -289,6 +323,7 @@ class DecoderRing {
System.err.println("\t-w\tdecode a widget");
System.err.println("\t-S b\tskip b bytes");
System.err.println("\t-x\textract image data to files");
System.err.println("\t-l\texpect data from logcat, instead of the local transport");
System.err.println("\tfilename\tread from filename, not stdin");
System.exit(1);
}