Support Django Channels' AsgiRequest (#272)

* Use request.META to extract Django request headers.  This makes rollbar compatible with Django Channels' AsgiRequest in addition to the standard WSGIRequest.

* Fix incompatibility with Python 3.x

rollbar/__init__.py

@@ -1126,10 +1126,10 @@ def _build_django_request_data(request):
  'method': request.method,
  'GET': dict(request.GET),
  'POST': dict(request.POST),
- 'user_ip': _wsgi_extract_user_ip(request.environ),
+ 'user_ip': _wsgi_extract_user_ip(request.META),
  }
 
- request_data['headers'] = _extract_wsgi_headers(request.environ.items())
+ request_data['headers'] = _extract_wsgi_headers(request.META.items())
 
  return request_data
 

rollbar/contrib/django/middleware.py

@@ -86,6 +86,7 @@ def get_payload_data(self, request, exc):
 from django.core.exceptions import MiddlewareNotUsed
 from django.conf import settings
 from django.http import Http404
+from six import reraise
 
 try:
  from django.urls import resolve
@@ -292,7 +293,7 @@ def process_response(self, request, response):
  try:
  if hasattr(request, '_rollbar_notifier_original_http404_exc_info'):
  exc_type, exc_value, exc_traceback = request._rollbar_notifier_original_http404_exc_info
- raise exc_type, exc_value, exc_traceback
+ reraise(exc_type, exc_value, exc_traceback)
  else:
  raise Http404()
  except Exception as exc: