private static string GetSignature(string key, int timestamp, string requestPath)
{
// The signature is the SHA1 result of (Timestamp + Route + key) (from http://debrid-link.fr/api_doc/#/home)
// Timestamp : server unix timestamp
// Route : path of the request
// key : key returned by authenticating
// example Timestamp + Route + key : 1418758917/account/infosi619yOI4Kt8WB02g
// SHA1 result : ab90fa6a2c9f1bc2bbd7988ff266971b5c10583c
string signature = timestamp.ToString() + requestPath + key;
string hash = Crypt.ComputeSHA1Hash(signature).zToHex(lowercase: true);
//if (__trace)
//{
// pb.Trace.WriteLine(" signature : \"{0}\"", signature);
// pb.Trace.WriteLine(" signature sha1 : \"{0}\"", hash);
//}
return(hash);
}