Fix bug when create new task

djing/__init__.py

@@ -2,10 +2,14 @@ import os
 import re
 import importlib
 import typing as t
+from urllib.parse import unquote
 
-from django.shortcuts import _get_queryset
+from django.http import HttpResponseRedirect, HttpResponse
 from netaddr import mac_unix, mac_eui48
 
+from django.shortcuts import _get_queryset
+from django.utils.http import is_safe_url
+
 MAC_ADDR_REGEX = r'^([0-9A-Fa-f]{1,2}[:-]){5}([0-9A-Fa-f]{1,2})$'
 
 IP_ADDR_REGEX = r'^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.' \
@@ -76,3 +80,12 @@ _JSONType_1 = t.Union[str, int, float, bool, None, t.Dict[str, _JSONType_0], t.L
 _JSONType_2 = t.Union[str, int, float, bool, None, t.Dict[str, _JSONType_1], t.List[_JSONType_1]]
 _JSONType_3 = t.Union[str, int, float, bool, None, t.Dict[str, _JSONType_2], t.List[_JSONType_2]]
 JSONType = t.Union[str, int, float, bool, None, t.Dict[str, _JSONType_3], t.List[_JSONType_3]]
+
+
+def httpresponse_to_referrer(request):
+    next = request.META.get('HTTP_REFERER')
+    if next:
+        next = unquote(next)
+    if not is_safe_url(url=next, allowed_hosts={request.get_host()}, require_https=request.is_secure()):
+        next = '/'
+    return HttpResponseRedirect(next) if next else HttpResponse(status=204)

taskapp/views.py

@@ -17,6 +17,7 @@ from django.views.generic.edit import FormMixin, DeleteView, UpdateView
 from guardian.decorators import permission_required_or_403 as permission_required
 from chatbot.models import MessageQueue
 from abonapp.models import Abon
+from djing import httpresponse_to_referrer
 from .handle import TaskException
 from .models import Task, ExtraComment
 from mydefs import only_admins, safe_int, MultipleException, RuTimedelta
@@ -137,7 +138,11 @@ class TaskUpdateView(UpdateView):
         else:
             if not request.user.has_perm('taskapp.change_task'):
                 raise PermissionDenied
+        try:
             return super(TaskUpdateView, self).dispatch(request, *args, **kwargs)
+        except TaskException as e:
+            messages.error(request, e)
+        return httpresponse_to_referrer(request)
 
     def get_form_kwargs(self):
         kwargs = super(TaskUpdateView, self).get_form_kwargs()