def get_headers_from_signature(self, signature):
        match = self.SIGNATURE_HEADERS_RE.search(signature)
        if not match:
            return ['date']
        headers_string = match.group(1)
        return headers_string.split()
Returns a list of headers fields to sign.
dataset/ETHPy150Open etoccalino/django-rest-framework-httpsignature/rest_framework_httpsignature/authentication.py/SignatureAuthentication.get_headers_from_signature