CallSite the caller's file & line.

GenRSAKey gen a rsa key pair, the bit size is 512.

HTTPGet http's get method.

MD5 md5 digest.

MD5String md5 digest in string.

TODO: WARNING!!!!!!! All struct field must be string type.

PasswordHash accept password and generate with uuid as salt FORMAT: sha1.Sum(pwd + salt + sha1.Sum(salt + pwd + salt) + salt + pwd).

生成随机字符串.

RsaDecrypt decrypt data by rsa.

RSAEncrypt encrypt data by rsa.

Sign with database appsecret string(base64 encode).

SortAndConcat sort the map by key in ASCII order, and concat it in form of "k1=v1&k2=v2".

TimeRange adjust the time range.

Verify with database appkey string(base64 encode).