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import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.Writer;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.IntBuffer;
import java.util.Random;
// apt-get install libcommons-lang3-java
//import org.apache.commons.lang3.RandomStringUtils;
public class RandomPackageNames {
private static Writer validWriter;
private static Writer invalidWriter;
private static final String[] py = {
"python3", "-c",
"import sys,re\n"
+ "m = re.search(r'''"
// + "^(?:[a-z_]+(?:\\d*[a-zA-Z_]*)*)(?:\\.[a-z_]+(?:\\d*[a-zA-Z_]*)*)*$"
+ "^[a-z_]+(?:\\d*[a-zA-Z_]*)(?:\\.[a-z_]+(?:\\d*[a-zA-Z_]*)*)*$"
+ "''', sys.stdin.read())\n"
+ "if m is not None:\n"
+ " with open('/tmp/foo', 'w') as fp:\n"
+ " fp.write(m.group() + '\\n')\n"
+ "sys.exit(m is None)"
};
public static boolean checkAgainstPython(String packageName)
throws IOException, InterruptedException {
ProcessBuilder pb = new ProcessBuilder(py);
Process process = pb.start();
OutputStream output = process.getOutputStream();
output.write(packageName.getBytes());
output.write("\n".getBytes());
output.flush();
output.close();
int exitVal = process.waitFor();
return exitVal == 0;
}
private static boolean isValidJavaIdentifier(String packageName) {
if (packageName.length() == 0 || !Character.isJavaIdentifierStart(packageName.charAt(0))) {
//System.out.println("invalid first char: '" + packageName + "'");
return false;
}
for (int codePoint : packageName.codePoints().toArray()) {
if (codePoint != 46 && !Character.isJavaIdentifierPart(codePoint)) {
//System.out.println("invalid char: '"
// + new StringBuilder().appendCodePoint(codePoint).toString() + "' "
// + codePoint);
return false;
}
}
return true;
}
private static void write(String packageName) throws IOException {
if (isValidJavaIdentifier(packageName)) {
validWriter.write(packageName);
validWriter.write("\n");
} else {
invalidWriter.write(packageName);
invalidWriter.write("\n");
}
}
private static void compare(String packageName)
throws IOException, InterruptedException {
boolean python = checkAgainstPython(packageName);
boolean java = isValidJavaIdentifier(packageName);
if (python && !java) {
System.out.println("MISMATCH: '" + packageName + "' "
+ (python ? "py:✔" : "py:☹") + " "
+ (java ? "ja:✔" : "ja:☹") + " ");
}
}
public static void main (String[] args)
throws IOException, InterruptedException, UnsupportedEncodingException {
int[] data;
byte[] bytes;
ByteBuffer byteBuffer;
Random random = new Random();
validWriter = new OutputStreamWriter(new FileOutputStream("valid.txt"), "UTF-8");
invalidWriter = new OutputStreamWriter(new FileOutputStream("invalid.txt"), "UTF-8");
//System.out.print(".");
char[] validFirstLetters = new char[27];
validFirstLetters[0] = 95; // _
for (int i = 1; i < 27; i++) {
validFirstLetters[i] = (char) (i + 96);
}
char[] validLetters = new char[64];
int j = 0;
for (char c = 32; c < 123; c++) {
if ((c == 46) || (c > 47 && c < 58) || (c > 64 && c < 91) || (c > 96)) {
validLetters[j] = c;
j++;
}
}
for (File f : new File("/home/hans/code/fdroid/fdroiddata/metadata").listFiles()) {
String name = f.getName();
if (name.endsWith(".yml")) {
compare(name.substring(0, name.length() - 4));
}
}
compare("SpeedoMeterApp.main");
compare("uk.co.turtle-player");
compare("oVPb");
compare(" _LS");
compare("r.vq");
compare("r.vQ");
compare("ra.vQ");
compare("s.vQ");
compare("r.tQ");
compare("r.vR");
compare("any.any");
compare("org.fdroid.fdroid");
compare("me.unfollowers.droid");
compare("me_.unfollowers.droid");
compare("me._unfollowers.droid");
compare("me.unfo11llowers.droid");
compare("me11.unfollowers.droid");
compare("m11e.unfollowers.droid");
compare("1me.unfollowers.droid");
compare("me.unfollowers23.droid");
compare("me.unfollowers.droid23d");
compare("me.unfollowers_.droid");
compare("me.unfollowers._droid");
compare("me.unfollowers_._droid");
compare("me.unfollowers.droid_");
compare("me.unfollowers.droid32");
compare("me.unfollowers.droid/");
compare("me:.unfollowers.droid");
compare(":me.unfollowers.droid");
compare("me.unfollowers.dro;id");
compare("me.unfollowe^rs.droid");
compare("me.unfollowers.droid.");
compare("me.unfollowers..droid");
compare("me.unfollowers.droid._");
compare("me.unfollowers.11212");
compare("me.1.unfollowers.11212");
compare("me..unfollowers.11212");
compare("abc");
compare("abc.");
compare(".abc");
for (int i = 0; i < 300000; i++) {
String packageName;
int count = random.nextInt(10) + 1;
byte valid = (byte) random.ints(97, 122).limit(1).toArray()[0];
// only valid
data = random.ints(46, 122)
.limit(count)
.filter(c -> (c == 46) || (c > 47 && c < 58) || (c > 64 && c < 91) || (c > 96))
.toArray();
byteBuffer = ByteBuffer.allocate(data.length);
for (int value : data) {
byteBuffer.put((byte)value);
}
if (data.length > 0) {
bytes = byteBuffer.array();
bytes[0] = valid;
packageName = new String(byteBuffer.array(), "UTF-8");
//System.out.println(packageName + ": " + isValidJavaIdentifier(packageName));
compare(packageName);
write(packageName);
}
// full US-ASCII
data = random.ints(32, 126).limit(count).toArray();
byteBuffer = ByteBuffer.allocate(data.length);
for (int value : data) {
byteBuffer.put((byte)value);
}
bytes = byteBuffer.array();
packageName = new String(bytes, "UTF-8");
//System.out.println(packageName + ": " + isValidJavaIdentifier(packageName));
compare(packageName);
write(packageName);
// full US-ASCII with valid first letter
data = random.ints(32, 127).limit(count).toArray();
byteBuffer = ByteBuffer.allocate(data.length * 4);
byteBuffer.asIntBuffer().put(data);
bytes = byteBuffer.array();
bytes[0] = valid;
packageName = new String(bytes, "UTF-8");
//System.out.println(packageName + ": " + isValidJavaIdentifier(packageName));
compare(packageName);
write(packageName);
// full unicode
data = random.ints(32, 0xFFFD).limit(count).toArray();
byteBuffer = ByteBuffer.allocate(data.length * 4);
byteBuffer.asIntBuffer().put(data);
packageName = new String(byteBuffer.array(), "UTF-32");
//System.out.println(packageName + ": " + isValidJavaIdentifier(packageName));
compare(packageName);
write(packageName);
// full unicode with valid first letter
data = random.ints(32, 0xFFFD).limit(count).toArray();
byteBuffer = ByteBuffer.allocate(data.length * 4);
byteBuffer.asIntBuffer().put(data);
bytes = byteBuffer.array();
bytes[0] = 0;
bytes[1] = 0;
bytes[2] = 0;
bytes[3] = 120;
packageName = new String(bytes, "UTF-32");
//System.out.println(packageName + ": " + isValidJavaIdentifier(packageName));
compare(packageName);
write(packageName);
}
validWriter.close();
invalidWriter.close();
}
}
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