Simple Rewrite returning 404

[manni (Manuel)]

I have a Dockerised container for Caddy that mounts some static assets, for some reason my rewrite attempts 404:

0.0.0.0:8585

gzip
log stdout
errors stdout

rewrite {
	r [a-z]+\.css

	to /assets/styles/
}

rewrite {
	r [a-z]+\.js

	to /assets/scripts/
}

The docker-compose file is like so:

  caddy:
    image: demo/caddy
    ports:
     - 8585:8585
    volumes:
     - ./assets:/assets:ro
     - /tmp:/tmp

Bash’ing into the container shows ls -l /assets/scripts etc do exist.

Can anyone provide some guidance?

[tobya (Toby Allen)]

try writing to your log using {rewrite_path} this will output what the rewrite engine is rewriting to which may help you diagnose what the issue is.

eg

log / stdout "{remote} {host} {uri} {rewrite_path}"

[manni (Manuel)]

I think it’s because I was using the Golang docker image, Caddy being installed in /go/bin - so setting root / fixed the issue if I first capture the rewrite rule and passed it on with the placeholder: to /assets/styles/{1}

[Whitestrake (Matthew Fay)]

Yeah, I’d think those rewrites wouldn’t work. For example:

rewrite {
	r [a-z]+\.js
	to /assets/scripts/
}

Would be trying to serve a request to /foo.js with /assets/scripts/, which isn’t a file and would 404.