Handle backend provisioning errors.

kolibri/core/device/hooks.py

@@ -15,3 +15,7 @@ def url(self):
 
     def plugin_url(self, plugin_class, url_name):
         return plugin_url(plugin_class, url_name)
+
+    @classmethod
+    def provision_url(cls):
+        return next(hook.url for hook in cls.registered_hooks)

kolibri/core/device/middleware.py

@@ -1,9 +1,12 @@
 from django.conf import settings
 from django.http import HttpResponseRedirect
+from django.shortcuts import redirect
 from django.urls import is_valid_path
 from django.utils import translation
 
 from .translation import get_language_from_request_and_is_from_path
+from kolibri.core.device.hooks import SetupHook
+from kolibri.core.device.utils import DeviceNotProvisioned
 from kolibri.utils.conf import OPTIONS
 
 
@@ -79,3 +82,16 @@ def __call__(self, request):
                 response["Content-Language"] = language
 
         return response
+
+
+class ProvisioningErrorHandler(object):
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def process_exception(self, request, exception):
+        if isinstance(exception, DeviceNotProvisioned) and SetupHook.provision_url():
+            return redirect(SetupHook.provision_url())
+        return None
+
+    def __call__(self, request):
+        return self.get_response(request)

kolibri/core/views.py

@@ -129,10 +129,8 @@ def get(self, request):
         Redirects user based on the highest role they have for which a redirect is defined.
         """
         # If it has not been provisioned and we have something that can handle setup, redirect there.
-        if not is_provisioned():
-            SETUP_WIZARD_URLS = [hook.url for hook in SetupHook.registered_hooks]
-            if SETUP_WIZARD_URLS:
-                return redirect(SETUP_WIZARD_URLS[0])
+        if not is_provisioned() and SetupHook.provision_url:
+            return redirect(SetupHook.provision_url())
 
         if request.user.is_authenticated():
             url = None

kolibri/deployment/default/settings/base.py

@@ -89,6 +89,7 @@
 
 MIDDLEWARE = [
     "kolibri.core.analytics.middleware.cherrypy_access_log_middleware",
+    "kolibri.core.device.middleware.ProvisioningErrorHandler",
     "django.middleware.cache.UpdateCacheMiddleware",
     "kolibri.core.analytics.middleware.MetricsMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",