I'm creating events on google calendar using the Google Calendar API, which is working fine. When I modify one of those events within Google Calendar, Google can email me an even update with an .ics file.
Is there a way determine the eventid via the email or ics file, and tie it back to the eventid when i created the event using the API?
For example, I want to automatically receive event change emails sent from Google Calendar, and update the event in my database (where I store the eventid returned from adding the event using the API)
In the body of the email, you should have:
<meta itemprop=3D"eventId/googleCalendar" content=3D"[your event id here]"/>
However, parsing email is not the best way to do this. The preferred method is laid out here: https://developers.google.com/google-apps/calendar/v3/sync
If you're needing/wanting a push method, that is laid out here: https://developers.google.com/google-apps/calendar/v3/push
来源：https://stackoverflow.com/questions/10846750/google-calendar-api-email-notification-ics-file