support for webcal

[georgehrke]

• add a subscription service
• for now query subscriptions on load (using render event with static option)

[georgehrke]

• register handler for webcal protocol

[georgehrke]

I'm afraid we will have to move this to 1.2.

[brot]

Will this issue be in the next calendar release 1.2? If yes, when can we expect this new calendar version? I ask because this issue should be the solution for my problem (#326).

[georgehrke]

@LukasReschke I'm currently working on webcal, when I try to access the ics file directly i get an CSP error. My new approach would be to create an PHP end point in the calendar app the JS could access. This end point would make the actual request to the ics file. The problem is, that the url to the ics file is completely user-controlled, doesn't necessarily need to be an ics file and can have any arbitrary content.

Is there a better approach or is this PHP endpoint thing fine?

(The PHP endpoint would basically return a json with the raw calendar data and maybe a new url if the server with the ics file returned a 301)
I can't access the subscriptions via PHP though. I would have to send the url directly to the PHP endpoint 😕

[LukasReschke]

@georgehrke So webcal means the ICS basically lives on "google.com" instead of "mycloud.com", is that correct?

Can you also show how you access the ICS file? – This should be pretty easy to resolve using a slightly adjusted CSP in the view controller.

[georgehrke]

So webcal means the ICS basically lives on "google.com" instead of "mycloud.com", is that correct?

Exactly

My current approach (with the CSP error) is this one:
https://github.com/owncloud/calendar/pull/443/files#diff-76e5b6d488dfa593c2c71732da4c0532R56

[georgehrke]

ping @LukasReschke :)

[strugee]

Ping @LukasReschke (again, since I really want this feature :D)

[Happyfeet01]

that would be cool :)

[caco3]

I also used the great but now abandoned script (cl-calendarimport) from Georg.
Now, after updating to OC9, I realise that that was a bad move as I now have no option anymore to get my work calendar to my phone :(

Let me explain my use case to show how important this feature is:
My company uses Outlook/Exchange. The sadly do not allow to access the Exchange server from the internet. But Outlook has a feature to export the calendar whenever a change to the calendar occurred (*). So it can upload my calendar as an ics file to a webdav server. This ics file now needs to be imported into a calendar (which should be wiped beforehand). Then my phone can fetch the new calendar.

Note this is only a one-way-sync, but still an acceptable way.

[georgehrke]

@caco3 You can use https://github.com/buzz/ics2owncloud.py in the meantime

[caco3]

I am aware of this script but it is not too easy to install the required Python modules on the server in use :(
I am currently trying to figure out how to use the modules without having to install them...

[Happyfeet01]

Can anyone tell me how to run the script? it won´t work anymore for me :(

[Happyfeet01]

@georgehrke can you tell me how to use this script? maybe on german :-)

[georgehrke]

@Happyfeet01 I don't know. I didn't develop it and i never used it.

[caco3]

@Happyfeet01: Welchen Script meinst Du?
Den Alten von Georg? Der geht mit Owncloud 9 nicht mehr!
Oder den Neuen auf https://github.com/buzz/ics2owncloud.py? Für den brauchtst Du eine laufende Python-Umgebung und Virtualenv.

[georgehrke]

Ich schätze mal das neue

[tcitworld]

Since some .ics providers (such as Google Calendar) do not have a Access-Control-Allow-Origin header, we cannot use them as-is, and the .ics files need to be downloaded before being used, right ?

Edit : Also, maybe a cache system ?

[georgehrke]

@LukasReschke ^

[georgehrke]

From IRC:

georgehrke: If you want it client-side set a custom CSP policy on your controller and use \OC\Security\CSP\ContentSecurityPolicy::setAllowedScriptDomains and add the proper domains in there
1:12:47 PM whitelisting is nicer here than going with *

[tcitworld]

You mean, when adding a new subscription, add it's domain into a config key ?

[georgehrke]

After I solved that issue I went into CORS problems, that we can't solve when keeping everything in js.
That's why I added a proxyController in the feature/webcal branch

[georgehrke]

implemented in #694

[Pazu]

Pardon me, but is there a separate issue open for exposing these subscribed calendars via CalDAV?

[tcitworld]

That would be a core issue.

[grafenhofer]

@Pazu @tcitworld I have filed respective bugreports for owncloud and nextcloud (see references above).

[necarnot]

Hello Georg,

I installed OwnCloud then NextCloud mostly only hoping I could find there a caldav client I could plug in my existing remote DaviCal server. At present (V11), I can only plug in a remote .ics, which is pointless to me.
I'm writing here to ask if there is further dev on this subject?

Best regards,