String secret="randomstring"; // Same as AuthTokenSecret
String protectedPath="/downloads/"; // Same as AuthTokenPrefix
//boolean ipLimitation=false; // Same as AuthTokenLimitByIp
long time= (new Date()).getTime(); // Time in decimal
time=time/1000; // timestamp of java is longer than PHP
String hexTime =Long.toHexString(time); // hexTime in Hexadecimal
String token =getMD5( (secret+ filePathName + hexTime).getBytes());
return protectedPath +token+"/"+hexTime+ filePathName;
public String getMD5(byte[] source) {
String s = null;
char hexDigits[] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
try {
java.security.MessageDigest md = java.security.MessageDigest
.getInstance("MD5");
md.update(source);
byte tmp[] = md.digest();
char str[] = new char[16 * 2];
int k = 0;
for (int i = 0; i < 16; i++) {
byte byte0 = tmp[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
s = new String(str);
} catch (Exception e) {
e.printStackTrace();
}
return s;
}