api: reverse-geocoding needs lat and lon (#6849)

wcs/api.py

@@ -25,7 +25,7 @@ import random
 
 from quixote import get_request, get_publisher, get_response
 from quixote.directory import Directory
-from qommon.errors import AccessForbiddenError
+from qommon.errors import AccessForbiddenError, QueryError
 
 def get_user_from_api_query_string():
     query_string = get_request().get_query()
@@ -120,10 +120,14 @@ class ApiDirectory(Directory):
     _q_exports = [('reverse-geocoding', 'reverse_geocoding')]
 
     def reverse_geocoding(self):
+        try:
+            lat = get_request().form['lat']
+            lon = get_request().form['lon']
+        except KeyError:
+            raise QueryError
         nominatim_url = get_publisher().get_site_option('nominatim_url')
         if not nominatim_url:
             nominatim_url = 'http://nominatim.openstreetmap.org'
         get_response().set_content_type('application/json')
         return urllib2.urlopen('%s/reverse?format=json&zoom=18&addressdetails=1&lat=%s&lon=%s' % (
-            nominatim_url,
-            get_request().form['lat'], get_request().form['lon'])).read()
+            nominatim_url, lat, lon)).read()