Remove POST-as-GET fallback to GET (#6994)

acme/acme/client.py

@@ -776,29 +776,13 @@ class ClientV2(ClientBase):
 
     def _post_as_get(self, *args, **kwargs):
         """
-        Send GET request using the POST-as-GET protocol if needed.
+        Send GET request using the POST-as-GET protocol.
-        The request will be first issued using POST-as-GET for ACME v2. If the ACME CA servers do
-        not support this yet and return an error, request will be retried using GET.
-        For ACME v1, only GET request will be tried, as POST-as-GET is not supported.
         :param args:
         :param kwargs:
         :return:
         """
-        if self.acme_version >= 2:
-            # We add an empty payload for POST-as-GET requests
         new_args = args[:1] + (None,) + args[1:]
-            try:
         return self._post(*new_args, **kwargs)
-            except messages.Error as error:
-                if error.code == 'malformed':
-                    logger.debug('Error during a POST-as-GET request, '
-                                 'your ACME CA server may not support it:\n%s', error)
-                    logger.debug('Retrying request with GET.')
-                else:  # pragma: no cover
-                    raise
-
-        # If POST-as-GET is not supported yet, we use a GET instead.
-        return self.net.get(*args, **kwargs)
 
 
 class BackwardsCompatibleClientV2(object):

acme/tests/client_test.py

@@ -885,19 +885,6 @@ class ClientV2Test(ClientTestBase):
                 new_nonce_url='https://www.letsencrypt-demo.org/acme/new-nonce')
             self.client.net.get.assert_not_called()
 
-            class FakeError(messages.Error):
-                """Fake error to reproduce a malformed request ACME error"""
-                def __init__(self):  # pylint: disable=super-init-not-called
-                    pass
-                @property
-                def code(self):
-                    return 'malformed'
-            self.client.net.post.side_effect = FakeError()
-
-            self.client.poll(self.authzr2)  # pylint: disable=protected-access
-
-            self.client.net.get.assert_called_once_with(self.authzr2.uri)
-
 
 class MockJSONDeSerializable(jose.JSONDeSerializable):
     # pylint: disable=missing-docstring