[Bug]: `calendar-access` missing from `DAV` header on

WhyNotHugo commented 1 year ago

⚠️ This issue respects the following points: ⚠️

[X] This is a bug, not a question or a configuration/webserver/proxy issue.
[X] This issue is not already reported on Github (I've searched it).
[X] Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
[X] Nextcloud Server is running on 64bit capable CPU, PHP and OS.
[X] I agree to follow Nextcloud's Code of Conduct.

Bug description

I'm writing a function to check whether a given URL corresponds to a server supporting CALDAV or not. For this, I'm checking the DAV URL as specified in rfc4791#section-5.1:

A server supporting the features described in this document MUST include "calendar-access" as a field in the DAV response header from an OPTIONS request on any resource that supports any calendar properties, reports, method, or privilege. A value of "calendar- access" in the DAV response header MUST indicate that the server supports all MUST level requirements specified in this document.

The URL (https://example.com/remote.php/dav) does support calendar access; I can successfully use REPORT to fetch calendar resources and PROPFIND to enumerate calendar resources and collections, so I'm quite sure I have the right URL.

Steps to reproduce

Send an OPTIONS http request.

Expected behavior

The DAV header should contain calendar-access.

Installation method

Other Community project

I don't have access to the server installation; I only have a test account which someone is lending me to test NextCloud support. As such, I don't have most of the below details.

Operating system

Other

PHP engine version

Other

Web server

Other

Database engine version

Other

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

[ ] Default user-backend (database)
[ ] LDAP/ Active Directory
[ ] SSO - SAML
[X] Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

Version from the about screen:

(I'm not entirely sure why, but text selection for copy-pasting was not possible).

WhyNotHugo commented 1 year ago

Note that calendar access itself does work, it's merely not advertised.

So when I try to check whether the URL is correct, the result is false, but when I try to use it assuming it is correct, it works.

WhyNotHugo commented 1 year ago

I should have specified for completeness's sake, the DAV header contains the following value:

1, 3, extended-mkcol, access-control, calendarserver-principal-property-search, nextcloud-checksum-update, nc-calendar-search, nc-enable-birthday-calendar

andyholmes commented 6 months ago

This is also true for the addressbook entry.

For CalDAV see: RFC 4791, Calendar Access Support

A server supporting the features described in this document MUST include "calendar-access" as a field in the DAV response header from an OPTIONS request on any resource that supports any calendar properties, reports, method, or privilege. A value of "calendar- access" in the DAV response header MUST indicate that the server supports all MUST level requirements specified in this document.

For CardDAV see: RFC 6352, Address Book Support

A server supporting the features described in this document MUST include "addressbook" as a field in the DAV response header from an OPTIONS request on any resource that supports any address book properties, reports, or methods. A value of "addressbook" in the DAV response header MUST indicate that the server supports all MUST level requirements and REQUIRED features specified in this document.

solracsf commented 6 days ago

Can't reproduce in v29.0.9

# curl -I -X OPTIONS -u "user:pass" https://my.cloud.com/remote.php/caldav
...
dav: 1, 3, extended-mkcol, calendar-access, calendar-proxy, access-control, calendarserver-principal-property-search, calendar-auto-schedule, calendar-availability
...

And for carddav:

# curl -I -X OPTIONS -u "user:pass" https://my.cloud.com/remote.php/carddav
...
dav: 1, 3, extended-mkcol, addressbook, access-control, calendarserver-principal-property-search
...

WhyNotHugo commented 5 days ago

Can you try also:

# curl -I -X OPTIONS -u "user:pass" https://my.cloud.com/remote.php/dav

If I recall correctly, that's the URL returned as current-user-principal, and the resource is where I'm querying the CALDAV:calendar-home-set property.

solracsf commented 5 days ago

Hum. I'm not a specialist in this area, please wait for someone who can verify this behavior 👍

nextcloud / server