make sure to enable compression before sending the auth creds

Author: aboudreault

cassandra/connection.py

@@ -897,6 +897,10 @@ def _connect_socket(self):
             for args in self.sockopts:
                 self._socket.setsockopt(*args)
 
+    def _enable_compression(self):
+        if self._compressor:
+            self.compressor = self._compressor
+
     def _enable_checksumming(self):
         self._io_buffer.set_checksumming_buffer()
         self._is_checksumming_enabled = True
@@ -1328,8 +1332,7 @@ def _handle_startup_response(self, startup_response, did_authenticate=False):
                             self.authenticator.__class__.__name__)
 
             log.debug("Got ReadyMessage on new connection (%s) from %s", id(self), self.endpoint)
-            if self._compressor:
-                self.compressor = self._compressor
+            self._enable_compression()
 
             if ProtocolVersion.has_checksumming_support(self.protocol_version):
                 self._enable_checksumming()
@@ -1345,6 +1348,7 @@ def _handle_startup_response(self, startup_response, did_authenticate=False):
                           "if DSE authentication is configured with transitional mode" % (self.host,))
                 raise AuthenticationFailed('Remote end requires authentication')
 
+            self._enable_compression()
             if ProtocolVersion.has_checksumming_support(self.protocol_version):
                 self._enable_checksumming()