Refs #24829 -- Made TemplateResponse.content available sooner in exception context

        signals.got_request_exception.send(sender=None, request=request)

        response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

    # Force a TemplateResponse to be rendered.

    if not getattr(response, 'is_rendered', True) and callable(getattr(response, 'render', None)):

        response = response.render()

    return response

from django.conf.urls import url

from django.core.exceptions import PermissionDenied

from django.template.response import TemplateResponse

from django.test import SimpleTestCase, override_settings

from django.test import SimpleTestCase, modify_settings, override_settings

class MiddlewareAccessingContent(object):

    def __init__(self, get_response):

        self.get_response = get_response

    def __call__(self, request):

        response = self.get_response(request)

        # Response.content should be available in the middleware even with a

        # TemplateResponse-based exception response.

        assert response.content

        return response

def template_response_error_handler(request, exception=None):

@override_settings(ROOT_URLCONF='handlers.tests_custom_error_handlers')

@modify_settings(MIDDLEWARE={'append': 'handlers.tests_custom_error_handlers.MiddlewareAccessingContent'})

class CustomErrorHandlerTests(SimpleTestCase):

    def test_handler_renders_template_response(self):