Issue Summary

Team Calendar private ICS url https://<confluence-base-url>/rest/calendar-services/1.0/calendar/export/subcalendar/private/<ics-file-name>.ics requires authentication starting from Confluence version 8.3.2 and 8.4.0.

This is reproducible on Data Center: (yes)

Steps to Reproduce

• In a Confluence instance running with version 8.3.2 and 8.4.0, add a Calendar.
• In the Right pane, click on ellipses (...) present next to the calendar added in the previous step and choose Subscribe Calendar.
• In the Calendar app drop-down, select Ical.
• Copy the ICS url from the Copy the Team Calendars URL text box.
• Access the Ical url using curl or wget, and it fails with a 401 error.

  curl -v https://<confluence-base-url>/rest/calendar-services/1.0/calendar/export/subcalendar/private/<ics-file-name>.ics
  wget https://<confluence-base-url>/rest/calendar-services/1.0/calendar/export/subcalendar/private/<ics-file-name>.ics
  

Expected Results

In the earlier versions, the Ical url did not ask for authentication. The Private ICAL url should work without authentication.

Actual Results

The Ical url fails with a 401 error when accessed with the curl or wget command.

curl -v https://<confluence-base-url>/rest/calendar-services/1.0/calendar/export/subcalendar/private/<ics-file-name>.ics
wget https://<confluence-base-url>/rest/calendar-services/1.0/calendar/export/subcalendar/private/<ics-file-name>.ics
{code:java}
 

Workaround

Workarounds include:

• In Calendar integration systems that support it, use a personal access token to authenticate
• Enable anonymous access for the site. Note that this also enables anonymous access to the dashboard, and any spaces that also have anonymous access explicitly enabled