# Functions
AESDecryptMsg ciphertext = AES_Encrypt[random(16B) + msg_len(4B) + rawXMLMsg + appId]参考：github.com/chanxuehong/wechat.v2.
AESEncryptMsg ciphertext = AES_Encrypt[random(16B) + msg_len(4B) + rawXMLMsg + appId]参考：github.com/chanxuehong/wechat.v2.
CalculateSign 计算签名.
DecodeWithCommonError 将返回值按照CommonError解析.
DecodeWithError 将返回值按照解析.
DecryptMsg 消息解密.
EncryptMsg 加密消息.
GetCurrTS return current timestamps.
HTTPGet get 请求.
HTTPPost post 请求.
OrderParam order params.
ParamSign 计算所传参数的签名.
PostFile 上传文件.
PostJSON post json 数据请求.
PostJSONWithRespContentType post json数据请求，且返回数据类型.
PostMultipartForm 上传文件或其他多个字段.
PostXML perform a HTTP/POST request with XML body.
PostXMLWithTLS perform a HTTP/POST request with XML body and TLS.
RandomStr 随机生成字符串.
Signature sha1签名.