github: Add list and fixtures for ignored events to webhook.

zerver/webhooks/github_webhook/view.py

@@ -1,10 +1,12 @@
 from __future__ import absolute_import
 import re
+import logging
 from functools import partial
-from typing import Any, Callable, Text, Dict
+from typing import Any, Callable, Text, Dict, Optional
 from django.http import HttpRequest, HttpResponse
 from zerver.lib.actions import check_send_message
 from zerver.lib.response import json_success
+from zerver.lib.request import JsonableError
 from zerver.models import Client, UserProfile
 from zerver.decorator import api_key_only_webhook_view, REQ, has_request_variables
 
@@ -384,14 +386,14 @@ def api_github_webhook(
         payload=REQ(argument_type='body'), stream=REQ(default='github')):
     # type: (HttpRequest, UserProfile, Client, Dict[str, Any], Text) -> HttpResponse
     event = get_event(request, payload)
-    if event != 'ping':
+    if event != 'ping' and event is not None:
         subject = get_subject_based_on_type(payload, event)
         body = get_body_function_based_on_type(event)(payload)
         check_send_message(user_profile, client, 'stream', [stream], subject, body)
     return json_success()
 
 def get_event(request, payload):
-    # type: (HttpRequest, Dict[str, Any]) -> str
+    # type: (HttpRequest, Dict[str, Any]) -> Optional[str]
     event = request.META['HTTP_X_GITHUB_EVENT']
     if event == 'pull_request':
         action = payload['action']
@@ -401,6 +403,9 @@ def get_event(request, payload):
             return 'assigned_or_unassigned_pull_request'
         if action == 'closed':
             return 'closed_pull_request'
+        if action in ('labeled', 'unlabeled', 'review_requested', 'review_request_removed'):
+            logging.warn('Event pull_request with {} action is unsupported'.format(action))
+            return None
         raise UnknownEventType(u'Event pull_request with {} action is unsupported'.format(action))
     if event == 'push':
         if is_commit_push_event(payload):