* * Get signature according to stringToSign, secret * @param stringToSign the signed string * @param secret accesskey secret * @return the signature */.

* * Get the string to be signed according to request * @param request which contains signed messages * @return the signed string */.

* * Encode data in events * @param events the object * @return the result */.

* * Judge if the origin is start with the prefix * @param origin the original string * @param prefix the prefix string * @return the result */.