Feature request: support operation behind a proxy

[tokarenko]

I suggest to support Zoekt operation behind a proxy by adding configurable base_url parameter as a prefix to lines 193-L197 of server.go:

	if s.HTML {
		mux.HandleFunc("/robots.txt", s.serveRobots)
		mux.HandleFunc("/search", s.serveSearch)
		mux.HandleFunc("/", s.serveSearchBox)
		mux.HandleFunc("/about", s.serveAbout)
		mux.HandleFunc("/print", s.servePrint)
	}

[linear]

SPLF-858 Feature request: support operation behind a proxy

[jtibshirani]

hello @tokarenko! At first glance, it feels like these endpoints should already work with a proxy. Is there a specific issue you're running into? (Just checking I understand the problem, to ensure we're making the right code change.)

[tokarenko]

We were unable to get Zoekt GUI working behind the nginx without prefixing the lines above. We tried to make Zoekt GUI accessible by …/zoekt/ URL. Without the base URL prefix all the links break as lead to a site root URL.

[jtibshirani]

I just checked with my team about how we serve this webserver GUI behind a proxy. Everything works well without any changes to Zoekt. Here's how we set up the proxy in Sourcegraph: https://sourcegraph.com/github.com/sourcegraph/sourcegraph-public-snapshot/-/blob/cmd/frontend/internal/app/debugproxies/handler.go?L38-41

nginx can have surprising behavior around trailing backslashes, it's worth double-checking your config looks roughly like this:

        location /zoekt/ {
            proxy_pass http://localhost:6070/;
        }