Quick Fix for NonXMLErrorException (#515)

Catch ParseError's and pass the response body up though the stack.
Partially addresses #514

Author: t8y8

tableauserverclient/server/endpoint/endpoint.py

@@ -1,4 +1,4 @@
-from .exceptions import ServerResponseError, InternalServerError
+from .exceptions import ServerResponseError, InternalServerError, NonXMLResponseError
 from functools import wraps
 from xml.etree.ElementTree import ParseError
 
@@ -69,8 +69,14 @@ def _check_status(self, server_response):
             try:
                 raise ServerResponseError.from_response(server_response.content, self.parent_srv.namespace)
             except ParseError:
-                # not an xml error
+                # This will happen if we get a non-success HTTP code that
+                # doesn't return an xml error object (like metadata endpoints)
+                # we convert this to a better exception and pass through the raw
+                # response body
                 raise NonXMLResponseError(server_response.content)
+            except Exception as e:
+                # anything else re-raise here
+                raise
 
     def get_unauthenticated_request(self, url, request_object=None):
         return self._make_request(self.parent_srv.session.get, url, request_object=request_object)

test/test_requests.py

@@ -5,7 +5,7 @@
 
 import tableauserverclient as TSC
 
-from tableauserverclient.server.endpoint.exceptions import InternalServerError
+from tableauserverclient.server.endpoint.exceptions import InternalServerError, NonXMLResponseError
 
 
 class RequestTests(unittest.TestCase):
@@ -55,3 +55,11 @@ def test_internal_server_error(self):
         with requests_mock.mock() as m:
             m.register_uri('GET', self.server.server_info.baseurl, status_code=500, text=server_response)
             self.assertRaisesRegexp(InternalServerError, server_response, self.server.server_info.get)
+
+    # Test that non-xml server errors are handled properly
+    def test_non_xml_error(self):
+        self.server.version = "3.2"
+        server_response = "this is not xml"
+        with requests_mock.mock() as m:
+            m.register_uri('GET', self.server.server_info.baseurl, status_code=499, text=server_response)
+            self.assertRaisesRegexp(NonXMLResponseError, server_response, self.server.server_info.get)