CalDav | CalDav server and client libraries

My server has IPv6 address, but as IPv6 does not work properly in some networks, I have created a sub-domain, which has only IPv4 address, and it points to the same IP as my server. This all is to serve my Nextcloud installation.

On the server, both names (server.org and subdomain.server.org) are served from the same directory tree. Both of them work fine, except for RewriteRules.

I have RewriteRules on .htaccess to handle .well-known/carddav etc things, and those rules work fine on my main domain, but not for the subdomain. Here is the .htaccess file:

I have Nextcloud (21.0.3) and Onlyoffice Documents Server (6.3.2.2) installed on the same server without docker. I'm using only nginx as webserver. SSL certificate is from European SSL.

Nextcloud and Document Server they have different domain names -> cloud.xxx.com and office.xxx.com. However if I'm trying to connect Document Server via Nextcloud Onlyoffice app I'm getting following error message: Error when trying to connect (Error occurred in the document service: Error while downloading the document file to be converted.) (version 6.3.2.2)

If I open cloud.xxx.com on my web browser there is no ssl issues.

Log File from the Onlyoffice Document Server says:

I want to develop an application to access some caledars in a google account.

My idea is to just set the google account, myaccount@gmail.com and the application can connect. The only requirement would be to go to the google account and give access to my application. In this way I can install the application for many users and they don't need to do anything.

It is how the addon caldav synchronizer works.

So for that, I create a service account in my google account, and I use this code to try to create the calendar service:

I'm trying to integrate a WebDAV client into some bigger tool suite to be able to create events/notifications from my software in the users existing calendar. My project is a WPF application written in c#.

I have set up a calendar with a WebDAV interface/api available and now I try to read the ctag property of the calendar. When sending the PROPFIND http request

I am trying to send yahoo calendars(caldav) a request to get "current-user-principal" But In response I am getting "401 Unauthorized" error. Before this request I am making another request to get "OPTIONS" which is giving "200 OK" response.

Request call is

I want to delete an Event of my Nextcloud calendar using CalDAV. But when I try to delete an object, I get an error.

This is my code:

I have a self-hosted CalDav calendar (DaviCal). Also, I have a Spring application, and I want to manage this calendar from my application (e.g. create events, users, scheduling). I have found a CalDAV library - iCal4j, but I cannot find any good documentation on how to use it. I need at least to connect to my calendar server. How to do it? Thanks in advance!

(p.s. I know, that there is another library - caldav4j but it seems to me that it has no more supported.)

I have an iCalendar event in my Sabre:

I'm working on a little project where I would like to fully sync my Apple Calendar with my web-app. I'm using two packages in python (caldav and icalendar) to view, create, update and delete events and then I'm using some GraphQL to prettify the data to my frontend. It's working quite nicely at the moment, but if I ever were to push this to production, there is one big problem. In the caldav-package, you need to supply a link to the client. It looks something like this: