Fix error handling. Well, actually ... implement it :)

geoip-lookup.py

@@ -82,9 +82,6 @@ def get_details(ipaddress, dbfile):
         reader = geoip2.database.Reader(dbfile)
         dbtype = reader.metadata().database_type
         result = None
-        country = None
-        continent = None
-        network = None
         if dbtype == 'GeoLite2-City' or dbtype == 'GeoIP2-City':
             result = reader.city(ipaddress)
         elif dbtype == 'GeoLite2-Country' or dbtype == 'GeoIP2-Country':
@@ -98,6 +95,14 @@ def get_details(ipaddress, dbfile):
         continent = result.continent.code
         network = result.traits.network
         return "%s,%s,%s" % (country, continent, network)
+    except FileNotFoundError as e:
+        raise LookupException(e.args)
+    except maxminddb.errors.InvalidDatabaseError as e:
+        raise LookupException(e.args)
+    except geoip2.errors.AddressNotFoundError as e:
+        raise LookupException(e.args)
+    except ValueError as e:
+        raise LookupException(e.args)
     finally:
         if reader:
             reader.close()