Filtering out calendar invites?

Filtering out calendar invites?

[Lars-Johan Liman]

Hi again!

(I'm positively surprised at the amount of list traffic my previous
simple question generated and very thankful for the attention it got, so
let's see about this one. ;-) )

I use the "imap" backend to download all mail and I want to filter out
messages that contain calendar invites in my incoming mail flow.

The trigger is that they contain a MIME message part with "Content-Type:
text/calendar".

I understand that the body may not be downloaded at the point of
splitting, but the IMAP protocol has the ability to list the
content-type of all MIME parts of a message on the server.

Is it possible to access that list of MIME parts and use it in a custom
function "(: (lambda nil ( ...)) )"in the nnmail-split-fancy variable?
If so, please hint or point me to RTFM.

Or is there a better/simpler way?

				Cheers,
				  /Liman
-- 
#-------------------------------------------------------------------------
# Lars-Johan Liman, M.Sc.		 ! E-mail: info-gnus-english@cafax.se
# Cafax AB				 ! HTTP  : //www.cafax.se/
# Computer Consultants, Sweden		 ! Voice : +46 8 - 564 702 30
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Re: Filtering out calendar invites?

[Lars-Johan Liman]

Whooa!

I'm backing up! My hack actually seems to work! ;-)

In case anyone googles this thread: this seems to work for me. Happy to
hear feedback from others.

I put this as one of the entries in my nnmail-split-fancy variable. It's
a bit crude as it doesn't assert that the string is actually a MIME tag
and not just part of the text in the message, but I'll live with the
risk ... ;-)

(: (lambda nil
     (save-excursion
       (save-restriction
	 (widen)
	 (goto-char (point-min))
	 (when (re-search-forward
                ;; The regexp "\\s-+" means "one or more whitespace chars".
                "^Content-Type:\\s-+text/calendar"
                nil
                t)
	   "calendar") ))))


				Cheers,
				  /Liman

info-gnus-english@cafax.se 2021-10-27 17:24 [+0200]:
> Hi again!

> (I'm positively surprised at the amount of list traffic my previous
> simple question generated and very thankful for the attention it got, so
> let's see about this one. ;-) )

> I use the "imap" backend to download all mail and I want to filter out
> messages that contain calendar invites in my incoming mail flow.

> The trigger is that they contain a MIME message part with "Content-Type:
> text/calendar".

> I understand that the body may not be downloaded at the point of
> splitting, but the IMAP protocol has the ability to list the
> content-type of all MIME parts of a message on the server.

> Is it possible to access that list of MIME parts and use it in a custom
> function "(: (lambda nil ( ...)) )"in the nnmail-split-fancy variable?
> If so, please hint or point me to RTFM.

> Or is there a better/simpler way?

> 				Cheers,
> 				  /Liman
> -- 
> #-------------------------------------------------------------------------
> # Lars-Johan Liman, M.Sc.		 ! E-mail: info-gnus-english@cafax.se
> # Cafax AB				 ! HTTP  : //www.cafax.se/
> # Computer Consultants, Sweden		 ! Voice : +46 8 - 564 702 30
> #-------------------------------------------------------------------------

Re: Filtering out calendar invites?

[Eric Abrahamsen]

Lars-Johan Liman <liman@netnod.se> writes:

> Whooa!
>
> I'm backing up! My hack actually seems to work! ;-)
>
> In case anyone googles this thread: this seems to work for me. Happy to
> hear feedback from others.
>
> I put this as one of the entries in my nnmail-split-fancy variable. It's
> a bit crude as it doesn't assert that the string is actually a MIME tag
> and not just part of the text in the message, 

If you really want to go down a rabbit hole, you can call the function
`gnus-article-mime-handles' while gnus-article-buffer is current. That
ought to give you a full list of the actual mime attachments on the
message.