Catches HTTP 300 while printing responses

If glance v1 api is not enabled, and a request is made to it,
it gives a KeyError. This patch catches the 300 error and
displays error message.

Fixes bug 1046607

Change-Id: I0009a5deca3b5dd5ccaeaea90feee21274bfe090

glanceclient/common/http.py

@@ -159,6 +159,8 @@ def _http_request(self, url, method, **kwargs):
         elif resp.status in (301, 302, 305):
             # Redirected. Reissue the request to the new location.
             return self._http_request(resp['location'], method, **kwargs)
+        elif resp.status == 300:
+            raise exc.from_response(resp)
 
         return resp, body_iter
 

glanceclient/exc.py

@@ -52,6 +52,16 @@ def __str__(self):
         return "%s (HTTP %s)" % (self.__class__.__name__, self.code)
 
 
+class HTTPMultipleChoices(HTTPException):
+    code = 300
+
+    def __str__(self):
+        self.details = ("Requested version of OpenStack Images API is not"
+                        "available.")
+        return "%s (HTTP %s) %s" % (self.__class__.__name__, self.code,
+                                    self.details)
+
+
 class BadRequest(HTTPException):
     """DEPRECATED"""
     code = 400