Reduce frequency and print error

pkgs/meteocat-exporter/meteocat-exporter

@@ -8,7 +8,7 @@ from urllib import request
 # Configuration -------------------------------------------
 meteo_station = "X8" # Barcelona - Zona Universitària
 listening_port = 9929
-update_period = 60 * 10 # Each 10 min
+update_period = 60 * 5 # Each 5 min
 # ---------------------------------------------------------
 
 metric_tmin = Gauge('meteocat_temp_min', 'Min temperature')
@@ -17,7 +17,7 @@ metric_tavg = Gauge('meteocat_temp_avg', 'Average temperature')
 metric_srad = Gauge('meteocat_solar_radiation', 'Solar radiation')
 
 def update(st):
-    url = 'http://www.meteo.cat/observacions/xema/dades?codi=' + st
+    url = 'https://www.meteo.cat/observacions/xema/dades?codi=' + st
     response = request.urlopen(url)
     data = response.read()
     soup = BeautifulSoup(data, 'lxml')
@@ -36,11 +36,19 @@ def update(st):
         metric_tmax.set(float(row_data[2]))
         metric_tmin.set(float(row_data[3]))
         metric_srad.set(float(row_data[10]))
+        #print("ok: temp_avg={}".format(float(row_data[1])))
     except:
-        pass
+        print("cannot parse row: {}".format(row))
+        metric_tavg.set(float("nan"))
+        metric_tmax.set(float("nan"))
+        metric_tmin.set(float("nan"))
+        metric_srad.set(float("nan"))
 
 if __name__ == '__main__':
     start_http_server(port=listening_port, addr="localhost")
     while True:
-        update(meteo_station)
+        try:
+            update(meteo_station)
+        except:
+            print("update failed")
         time.sleep(update_period)