MailCatcher UI not working in 0.10.0 (when installed via homebrew)

[iamstuba]

Environment:

OS: macOS Sonoma 14.4.1
Ruby: 3.3.2
MailCatcher: 0.10.0
Browser: Google Chrome (125.0.6422.114) and Mozilla Firefox (126.0.1)

The .js and .css files from /assets are resolving with an incorrect content-type of text/html, which prevents browsers from executing them.

This issue was not present in the 0.9.0 version of MailCatcher.

[joshualip-plaudit]

Were you able to find a solution? (It's happening to me as well)

[iamstuba]

Nope. Haven't ever written a line of Ruby, so don't really know how/where the headers are set. I'd hope/think that for anyone more familiar with Ruby and/or MailCatcher this'd be quite an easy fix.

[kilis]

Same issue when installed via Homebrew for version 0.10.0

[iamstuba]

@joshualip-plaudit @kilis, my current workaround is to just go to http://127.0.0.1:1080/messages/{X}.html where {X} is the id of the message I want to see. Not optimal, but at least I can work this way.

Wasn't able to install version 0.9.0 of MailCatcher via Homebrew for some reason.

[sj26]

Hm, this is a weird one. And I can't replicate it -- for me they resolve with the correct content type:

including in Chrome:

[iamstuba]

mailcatcher --foreground
Starting MailCatcher v0.10.0
==> smtp://127.0.0.1:1025
==> http://127.0.0.1:1080

curl -I http://localhost:1080/assets/mailcatcher.js
HTTP/1.1 404 Not Found
X-Cascade: pass
Content-Type: text/html;charset=utf-8
Content-Length: 145
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Connection: keep-alive
Server: thin

Seems like my initial report was incorrect and the assets folder isn't even exposed. I've installed MailCatcher through Homebrew.

[sj26]

I've installed MailCatcher through Homebrew.

Ah, interesting. Through the tap? That hasn’t been updated in a very long time.

https://github.com/sj26/homebrew-mailcatcher

[sj26]

Oh, there’s an official formula now!

https://github.com/Homebrew/homebrew-core/blob/95f7ea11c1fe7c4f65a81b5e09984cd392316bef/Formula/m/mailcatcher.rb

but it’s missing the step that compiles assets. That’s the issue.

[iamstuba]

Seems like the homebrew PR was automatically closed? 🤔

[sj26]

Yeah. The formula is broken, but I don’t install with homebrew and don’t know how to fix it. Please help if you know how! 🙏

[james-caresnap]

@sj26 I opened a discussion on the homebrew github page to discuss the proper way to fix the homebrew formula.

tldr; it seems like the easiest path forward would be to add a Gemfile.lock to the mailcatcher repo. Then the formula can simply install the released gem version from rubygems.

Any particular feelings about checking in a Gemfile.lock going forward? It seems kind of pointless to me, other than to satisfy the homebrew folks. Unfortunately it lightens the burden on maintaining the homebrew formula by shifting the burden to the mailcatcher repo.

[james-caresnap]

@sj26 any thoughts on the above?