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# -*- coding: utf-8 -*-
import threading
from django.core.handlers.wsgi import WSGIHandler
tld = threading.local()
tld.wsgi_tb = None
def null_technical_500_response(request, exc_type, exc_value, tb, status_code=500):
"""
Alternative function for django.views.debug.technical_500_response.
Django's convert_exception_to_response() wrapper is called on each 'Middleware' object to avoid
leaking exceptions. If an uncaught exception is raised, the wrapper calls technical_500_response()
to create a response for django's debug view.
Runserver_plus overrides the django debug view's technical_500_response() function to allow for
an enhanced WSGI debugger view to be displayed. However, because Django calls
convert_exception_to_response() on each object in the stack of Middleware objects, re-raising an
error quickly pollutes the traceback displayed.
Runserver_plus only needs needs traceback frames relevant to WSGIHandler Middleware objects, so
only store the traceback if it is for a WSGIHandler. If an exception is not raised here, Django
eventually throws an error for not getting a valid response object for its debug view.
""" # noqa: E501
try:
# Store the most recent tb for WSGI requests.
# The class can be found in the second frame of the tb
if isinstance(tb.tb_next.tb_frame.f_locals.get("self"), WSGIHandler):
tld.wsgi_tb = tb
elif tld.wsgi_tb:
tb = tld.wsgi_tb
except AttributeError:
pass
try:
if exc_value is None:
exc_value = exc_type()
if exc_value.__traceback__ is not tb:
raise exc_value.with_traceback(tb)
raise exc_value
finally:
exc_value = None
tb = None
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