Serve files in root before passing to proxy

Help
1

I’m trying to replicate my old Nginx configuration that used the try_files directive to attempt to serve files from my public folder before passing the request to my Rails app.

Here’s my current Caddyfile:

www.example.com {
    root /srv/webapp/current/public
    tls webmaster@example.com
    gzip

    cors /assets https://www.example.com
       
        proxy / unix:/srv/webapp/shared/tmp/sockets/puma.sock {
           except /assets
           transparent
        }
}

As with most Rails applications, my public folder looks like:

public/
|-- 404.html
|-- 422.html
|-- 500.html
|-- apple-touch-icon-precomposed.png
|-- apple-touch-icon.png
|-- assets -> /srv/webapp/shared/public/assets
|-- favicon.ico
|-- robots.txt
|-- sitemap.xml.gz
|-- system -> /srv/webapp/shared/public/system
\`-- uploads -> /srv/webapp/shared/public/uploads

My current Caddy configuration serves files out of the assets folder with no problem, because of except /assets in the proxy block. However, I also want Caddy to serve all other files in the public folder, 404.html, 500.html, etc.

I see no good way of accomplishing this aside from listing all the files as arguments to the except directive, which just seems hackish.

How can I configure Caddy to serve a file if it exists, and pass the request to the proxy if the file does not exist?

2

Have you look into this ? It specifically mentioned nginx try_files.

3

Perhaps you could rewrite to {path} {path}/ /ruby-app{uri} and proxy /ruby-app to your app, using without /ruby-app?

4

This seem to work:-

localhost:4000
root ./public
rewrite {
    if {path} is /
    to /proxy/{uri}
}
rewrite {
    to {path} /proxy/{uri}
}

proxy /proxy localhost:8080 {
    without /proxy
}

Based on this issue - https://github.com/mholt/caddy/issues/695

Although this seem to break my websocket directive.

5

What happens when you include websocket in the proxy directive? You might still want to include transparent as well, unless your app doesn’t use X-Forwarded headers.

6

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