How to handle an exception in a Django Middleware?

Question

I have a problem with proper handling an exception in Django middleware. My exception:

from rest_framework.exceptions import APIException
from rest_framework.status import HTTP_403_FORBIDDEN
class MyProfileAuthorizationError(APIException):    
    def __init__(self, msg):
        APIException.__init__(self, msg)
        self.status_code = HTTP_403_FORBIDDEN
        self.message = msg

And my Middleware:

class PatchRequestUserWithProfile:
def __init__(self, get_response):
    self.get_response = get_response

def __call__(self, request, *args, **kwargs):
    patch_request_for_nonanon_user(request)
    if not request.user.profile:
        raise MyProfileAuthorizationError("You are not allowed to use this profile.")

    response = self.get_response(request)
    return response

And this exception throws 500 instead of 403. How can i fix that?

Answer 1

Try to return a HttpResponseForbidden response instead of raising exception

from django.http import HttpResponseForbidden


class PatchRequestUserWithProfile:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request, *args, **kwargs):
        patch_request_for_nonanon_user(request)
        if not request.user.profile:
            return HttpResponseForbidden("You are not allowed to use this profile.")

        response = self.get_response(request)
        return response