(self, name, secret)
Extract a signed cookie of ``name`` from the request

        The cookie is expected to have been created with
        ``Response.signed_cookie``, and the ``secret`` should be the
        same as the one used to sign it.

        Any failure in the signature of the data will result in None
        being returned.
Extract a signed cookie of ``name`` from the request
Extract a signed cookie of name from the request
def signed_cookie(self, name, secret):
        """Extract a signed cookie of ``name`` from the request

        The cookie is expected to have been created with
        ``Response.signed_cookie``, and the ``secret`` should be the
        same as the one used to sign it.

        Any failure in the signature of the data will result in None
        being returned.

        """
        cookie = self.str_cookies.get(name)
        if not cookie:
            return None
        try:
            input_sig, pickled = cookie[:40], base64.standard_b64decode(cookie[40:])
        except binascii.Error:
            # Badly formed data can make base64 die
            return None
        sig = hmac.new(secret, pickled, sha1).hexdigest()

        # Avoid timing attacks
        invalid_bits = 0
        if len(sig) != len(input_sig):
            return None

        for a, b in zip(sig, input_sig):
            invalid_bits += a != b

        if invalid_bits:
            return None
        else:
            return pickle.loads(pickled)
def signed_cookie ( self , name , secret ) : cookie = self . str_cookies . get ( name ) if not cookie : return None try : input_sig , pickled = cookie [ : 40 ] , base64 . standard_b64decode ( cookie [ 40 : ] ) except binascii . Error : # Badly formed data can make base64 die return None sig = hmac . new ( secret , pickled , sha1 ) . hexdigest ( ) # Avoid timing attacks invalid_bits = 0 if len ( sig ) != len ( input_sig ) : return None for a , b in zip ( sig , input_sig ) : invalid_bits += a != b if invalid_bits : return None else : return pickle . loads ( pickled )