Merge "Check response type in _extract_error_json"

magnumclient/common/httpclient.py

@@ -60,7 +60,10 @@ def _extract_error_json_text(body_json):
 
 def _extract_error_json(body, resp):
     """Return error_message from the HTTP response body."""
-    content_type = resp.headers.get("Content-Type", "")
+    try:
+        content_type = resp.headers.get("Content-Type", "")
+    except AttributeError:
+        content_type = ""
     if content_type.startswith("application/json"):
         try:
             body_json = resp.json()

releasenotes/notes/bug-1870264-1b4f14618b8422f9.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    [`bug 1870264 <https://bugs.launchpad.net/python-magnumclient/+bug/1870264>`_]
+    Fixed bug where the error message from the response could not be parsed.