icat kitten does not work with HTTPS image URIs

[lamby]

This appears to be due to ImageMagick's Security Policy:

$ icat https://sw.kovidgoyal.net/kitty/_static/kitty.png
Failed to open image: https://sw.kovidgoyal.net/kitty/_static/kitty.png with error: identify-im6.q16: attempt to perform an operation not allowed by the security policy `HTTPS' @ error/delegate.c/InvokeDelegate/1726.
identify-im6.q16: unable to open file `': No such file or directory @ error/constitute.c/ReadImage/600.

If it helps, the underlying call is: identify -format '%m %w %h %A' https://sw.kovidgoyal.net/kitty/_static/kitty.png. Hopefully we can set a policy when calling-out to identify.

Note that HTTP (ie. not-SSL) images Just Work.

[kovidgoyal]

You could just do

curl https://whatever | icat

[kovidgoyal]

It will be much more efficient since the image will not be fetched twice.

[lamby]

Oh sure, lots of solutions… but it's strange to half-support HTTP (!) but not HTTPS. :)

[kovidgoyal]

well icat does not technically support any network protocols, that is an accident of imagemagick. The proper fix for this would be to identify http(s) URLs and either download them ourselves before processing, or filter them out.