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The primary change (in its own commit for clarity) is to allow dot (
.
) characters in attachment file name. The default constraint on segments does not allow dots, so requests for attachments with a dot in the file name wouldn't find a route, resulting in a 404 out of the Rails router.The other commits are appeasing Rubocop.
An alternative approach
There are likely other characters allowed in file names, but disallowed in the path of a URL. If we'd also like to handle those, we could change the way we pass the attachment file name to use a query param. So the route would change to something like:
The
filename
param would also be URL encoded to make it safe. If you like this idea, I can adjust this PR to use that approach. Or, just roll with this one as-is and deal with that later, if someone needs it.