IXF preview tool (#408)

peeringdb_server/import_views.py

@@ -0,0 +1,45 @@
+import json
+
+from django.http import JsonResponse, HttpResponse
+from django.conf import settings
+from django.utils.translation import ugettext_lazy as _
+
+from django_namespace_perms.util import has_perms
+from ratelimit.decorators import ratelimit, is_ratelimited
+
+from peeringdb_server import ixf
+from peeringdb_server.models import IXLan
+
+RATELIMITS = settings.RATELIMITS
+
+
+@ratelimit(key="ip", rate=RATELIMITS["view_import_ixlan_ixf_preview"])
+def view_import_ixlan_ixf_preview(request, ixlan_id):
+
+    # check if request was blocked by rate limiting
+    was_limited = getattr(request, "limited", False)
+    if was_limited:
+        return JsonResponse({
+            "non_field_errors": [
+                _("Please wait a bit before requesting " \
+                  "another ixf import preview.")
+            ]
+        }, status=400)
+
+    try:
+        ixlan = IXLan.objects.get(id=ixlan_id)
+    except IXLan.DoesNotExist:
+        return JsonResponse({
+            "non_field_errors": [_("Ixlan not found")]
+        }, status=404)
+
+    if not has_perms(request.user, ixlan, "update"):
+        return JsonResponse({
+            "non_field_errors": [_("Permission denied")]
+        }, status=403)
+
+    importer = ixf.Importer()
+    importer.update(ixlan, save=False)
+
+    return HttpResponse(
+        json.dumps(importer.log, indent=2), content_type="application/json")