Mirror the iCal file

1 files changed, 23 insertions, 4 deletions

diff --git a/scripts/get_calendar.py b/scripts/get_calendar.py
index 639e1ea..cb3c800 100644
--- a/scripts/get_calendar.py
+++ b/scripts/get_calendar.py
@@ -15,9 +15,26 @@ import subprocess
 def fetch_calendar(logger):
     """Fetches the calendar events and returns a icalendar.Calendar instance.
     """
-    response = urllib2.urlopen(CALENDARIUM_IMPORT_URL)
-    logger.debug('Fetched calendar from %s' % CALENDARIUM_IMPORT_URL)
-    return icalendar.Calendar.from_ical(response.read())
+    try:
+        response = urllib2.urlopen(CALENDARIUM_IMPORT_URL)
+        logger.debug('Fetched calendar from %s' % CALENDARIUM_IMPORT_URL)
+    except Exception:
+        sys.excepthook(*sys.exc_info())
+        content = None
+    else:
+        content = response.read()
+
+    if content is None:
+        # If we couldn't fetch the content, pull it from the copied file
+        # if it's not there, just fail fatally as we don't have any data
+        with open(CALENDARIUM_EXPORT, 'r') as export_file:
+            content = export_file.read()
+    else:
+        with open(CALENDARIUM_EXPORT + '.new', 'w') as export_file:
+            export_file.write(content)
+        os.rename(CALENDARIUM_EXPORT + '.new', CALENDARIUM_EXPORT)
+
+    return icalendar.Calendar.from_ical(content)
 
 def get_events(calendar, after, before):
     """Yields all events in calendar as dictionary.
@@ -91,8 +108,11 @@ def put_events(calendar, after, before, destination):
         return True
     return False
 
+base_path = os.path.dirname(os.path.abspath(__file__))
 #CALENDARIUM_IMPORT_URL = 'https://sublab.org:5232/calendars/events'
 CALENDARIUM_IMPORT_URL = 'https://posteo.de/calendars/ics/ruku1tibpa2b2evfwsxrbvwcy2n60j9g'
+CALENDARIUM_EXPORT = os.path.join(base_path, '../public/calendar.ical')
+
 if __name__ == '__main__':
     logging.basicConfig(stream=sys.stderr, level=logging.ERROR)
     logger = logging.getLogger('calendar_feed')
@@ -100,7 +120,6 @@ if __name__ == '__main__':
     now = datetime.now()
     after = now - relativedelta(days=1)
     before = now + relativedelta(months=+1)
-    base_path = os.path.dirname(os.path.abspath(__file__))
 
     after_tab = datetime(now.year,now.month,1);
     if now.month + 2 > 12: