Google CardDAV API 403 Error
问题 I've been trying to use Google's CardDAV APIs (and I've successfully gotten CalDAV access working). Unfortunately, I keep getting a 403 error when trying to discover the user's current-user-principal. FWIW, I have gone to Google's Developer Console and set up client information and it seems to work perfectly fine for CalDAV access. Here is a snippet of the HTTP traffic for CardDAV: PROPFIND https://www.googleapis.com:443/.well-known/carddav/ Depth: 0 Content-Type: text/xml Brief: T