util.py 文件源码

def compute_signature(self, uri, params, utf=PY3):
        """Compute the signature for a given request

        :param uri: full URI that Twilio requested on your server
        :param params: post vars that Twilio sent with the request
        :param utf: whether return should be bytestring or unicode (python3)

        :returns: The computed signature
        """
        s = uri
        if len(params) > 0:
            for k, v in sorted(params.items()):
                s += k + v

        # compute signature and compare signatures
        mac = hmac.new(self.token, s.encode("utf-8"), sha1)
        computed = base64.b64encode(mac.digest())
        if utf:
            computed = computed.decode('utf-8')

        return computed.strip()