Check for some issues like empty input, recoverable exceptions, etc

server/lib/python/cartodb_services/cartodb_services/mapzen/types.py

@@ -10,7 +10,11 @@ def polyline_to_linestring(polyline):
         coordinates.append("%s %s" % (point[1]/10, point[0]/10))
     wkt_coordinates = ','.join(coordinates)
 
-    sql = "SELECT ST_GeomFromText('LINESTRING({0})', 4326) as geom".format(wkt_coordinates)
-    geometry = plpy.execute(sql, 1)[0]['geom']
+    try:
+        sql = "SELECT ST_GeomFromText('LINESTRING({0})', 4326) as geom".format(wkt_coordinates)
+        geometry = plpy.execute(sql, 1)[0]['geom']
+    except BaseException as e:
+        plpy.warning("Can't generate LINESTRING from polyline: {0}".format(e))
+        geometry = None
 
     return geometry

server/lib/python/cartodb_services/cartodb_services/tools/coordinates.py

@@ -17,3 +17,5 @@ class Coordinate:
     def to_json(self):
         return "{{\"lon\": {0},\"lat\": {1}}}".format(self._longitude,
                                                       self._latitude)
+    def __str__(self):
+        return "{0}, {1}".format(self._longitude, self._latitude)

server/lib/python/cartodb_services/cartodb_services/tools/polyline.py

@@ -11,14 +11,11 @@ class PolyLine:
         for chunk in chunks:
             coordinate = self._process_chunk(chunk)
             coordinate /= 1e5
-            print coordinate
             if len(coordinates) > 1:
                 # We have to sum the previous with the offset in this chunk
                 coordinate += coordinates[-2]
             coordinates.append(round(coordinate, 5))
 
-        print coordinates
-
         return zip(coordinates, coordinates[1:])[::2]
 
     def _extract_chunks(self, data):