tootctl media lookup doesn't work for local media

[brookmiles]

Steps to reproduce the problem

1. run tootctl media lookup on the URL of a locally posted media file

Expected behaviour

Displays URL of post containing the given media file

Actual behaviour

Displays "Not a media URL"

Detailed description

Running the command:
RAILS_ENV=production bin/tootctl media lookup https://media.mastodon.sunny.garden/media_attachments/files/113/632/298/078/427/840/original/656aebb68bf18a19.jpg

Returns:
Not a media URL

And yet, it clearly is a media URL.

A brief inspection of the code at...

mastodon/lib/mastodon/cli/media.rb

Line 271 in 58a0293

fail_with_message 'Not a media URL' unless VALID_PATH_SEGMENTS_SIZE.include?(path_segments.size)

... shows that the code relies on specific numbers of URL path elements, which do not match up with the actual number of elements in a local media path.

If I pass in a modified URL to add a "/cache" path element - which the code will strip out - the number of path elements now matches and the command will successfully look up the post, even though the actual URL passed in is invalid.

Running:
RAILS_ENV=production bin/tootctl media lookup https://media.mastodon.sunny.garden/cache/media_attachments/files/113/632/298/078/427/840/original/656aebb68bf18a19.jpg

Returns:
https://sunny.garden/@brook/113632322942825152

Mastodon instance

sunny.garden

Mastodon version

v4.3.3

Technical details

If this is happening on your own Mastodon server, please fill out those:

• Ruby version: ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [x86_64-linux]
• Node.js version: v20.17.0