[MlMt] Proposal: conditional image loading by URL filtering

[Benny Kjær Nielsen]

On 4 Nov 2017, at 17:10, Sam Hathaway wrote:

> I’ve been thinking about whether there’d be an easy way for you to 
> add conditional domain-based image loading, without doing a bunch of 
> UI work for a feature that (admittedly) has limited appeal.

Thanks for the detailed idea.
>
> 2. If this is set, MailMate would run this program when displaying an 
> HTML email. It would send the program each image URL on stdin, and 
> expect to get back the strings `allow` or `deny`.

I'm thinking it might be a performance issue to call a script for every 
image (there can be a lot of them in a single email).

> Everyone else could ignore this feature.
>
> What do you think?

It might be nice with a more flexible solution, but if all you want is a 
regular expression to allow certain images then I already implemented 
`MmAllowedImageURLRegexp`. For example:

	defaults write com.freron.MailMate MmAllowedImageURLRegexp -string 
"https://(freron\.com|example\.com)/.*"

Hmm, it appears I've “forgotten” to document this. Maybe because I 
didn't really finish this feature. I would have liked to also handle a 
`MmDisallowedImageURLRegexp`. Let me know if you need that.

-- 
Benny
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