Get first non-empty value.

GetMD5Base64 returns a string which has been base64.

GetTimeInFormatISO8601 returns a time string.

GetURLFormedMap returns a url encoded string.

GetUUID returns a uuid.

NewRuntime returns a Runtime.

RandStringBytes returns a rand string.

Sha256WithRsa return a string which has been hashed with Rsa.

ShaHmac1 return a string which has been hashed.

Timeout is for connect Timeout.

Runtime is for setting timeout, proxy and host.

set back the memoried enviroment variables.