#189 Minor fix

* adds try-catch if WFS result is not a valid json

konova/models/geometry.py

@@ -132,9 +132,9 @@ class Geometry(BaseResource):
             lock_id = f"parcel_calc-lock-{flr_id}"
             with cache_lock(lock_id) as acquired:
                 while not acquired:
-                    print(f"Am locked. Need to rest. Calculating: {parcel_properties}")
                     sleep(0.5)
                     acquired = cache_lock(lock_id)
+
                 district = District.objects.get_or_create(
                     key=parcel_properties["kreisschl"],
                     name=parcel_properties["kreis"],

konova/utils/wfs/spatial.py

@@ -86,13 +86,14 @@ class ParcelWFSFetcher(AbstractWFSFetcher):
         from konova.models import Geometry
         if filter_srid is None:
             filter_srid = DEFAULT_SRID_RLP
-        geom_gml = Geometry.objects.filter(
+        geom = Geometry.objects.filter(
             id=self.geometry_id
         ).annotate(
             transformed=Transform(srid=filter_srid, expression="geom")
         ).annotate(
             gml=AsGML(MakeValid('transformed'))
-        ).first().gml
+        ).first()
+        geom_gml = geom.gml
         spatial_filter = f"<Filter><{geometry_operation}><PropertyName>{self.geometry_property_name}</PropertyName>{geom_gml}</{geometry_operation}></Filter>"
         return spatial_filter
 
@@ -163,7 +164,28 @@ class ParcelWFSFetcher(AbstractWFSFetcher):
                 if rerun_on_exception:
                     # Wait a second before another try
                     sleep(1)
-                    self.get_features(
+                    return self.get_features(
+                        typenames,
+                        spatial_operator,
+                        filter_srid,
+                        start_index,
+                        rerun_on_exception=False
+                    )
+                else:
+                    e.msg += content
+                    raise e
+
+            try:
+                fetched_features = content.get(
+                    "features",
+                    {},
+                )
+            except AttributeError as e:
+                # Might occur if returned content is no json but something different (maybe an error message)
+                if rerun_on_exception:
+                    # Wait a second before another try
+                    sleep(1)
+                    return self.get_features(
                         typenames,
                         spatial_operator,
                         filter_srid,
@@ -173,10 +195,6 @@ class ParcelWFSFetcher(AbstractWFSFetcher):
                 else:
                     e.msg += content
                     raise e
-            fetched_features = content.get(
-                "features",
-                {},
-            )
 
             found_features += fetched_features
 
@@ -187,4 +205,7 @@ class ParcelWFSFetcher(AbstractWFSFetcher):
                 # If a 'full' response returned, there might be more to fetch. Increase the start_index!
                 start_index += self.count
 
+        if not found_features:
+            print(f"No features found. Fetched content: {content}\nUsed POST body: {post_body}")
+
         return found_features