Fix "can't concat str to bytes" error

apps/auth/views.py

@@ -53,7 +53,7 @@ class LearnerRegistrationView(FormView):
         # fixme: async send email
         config = Config.load()
         refferer = urlsplit(self.request.META.get('HTTP_REFERER'))
-        refferer = refferer[0] + '://' + refferer[1]
+        refferer = str(refferer[0]) + '://' + str(refferer[1])
         token = verification_email_token.make_token(user)
         url = refferer + str(reverse_lazy('lilcity:verification-email', args=[token]))
         send_email('Verification Email', email, "notification/email/verification_email.html", url=url, config=config)
@@ -113,7 +113,7 @@ class PasswordResetView(views.PasswordContextMixin, BaseFormView):
 
     def form_valid(self, form):
         refferer = urlsplit(self.request.META.get('HTTP_REFERER'))
-        refferer = refferer[0] + '://' + refferer[1]
+        refferer = str(refferer[0]) + '://' + str(refferer[1])
         config = Config.load()
         extra_email_context = {'config': config}
         if self.extra_email_context and isinstance(self.extra_email_context, dict):

apps/payment/views.py

@@ -48,7 +48,7 @@ class CourseBuyView(TemplateView):
 
     def get(self, request, pk=None, *args, **kwargs):
         host = urlsplit(self.request.META.get('HTTP_REFERER'))
-        host = host[0] + '://' + host[1]
+        host = str(host[0]) + '://' + str(host[1])
         course = Course.objects.get(id=pk)
         if request.user == course.author:
             messages.error(request, 'Вы не можете приобрести свой курс.')
@@ -85,7 +85,7 @@ class SchoolBuyView(TemplateView):
 
     def get(self, request, *args, **kwargs):
         host = urlsplit(self.request.META.get('HTTP_REFERER'))
-        host = host[0] + '://' + host[1]
+        host = str(host[0]) + '://' + str(host[1])
         weekdays = set(request.GET.getlist('weekdays', []))
         if not weekdays:
             messages.error(request, 'Выберите несколько дней недели.')