forward http request to unix socket

http-unix.go

package main

import (
	"log"
	"net"
	"net/http"
	"net/http/httputil"
	"net/url"
)
// From: https://stackoverflow.com/a/26224019/5563477
func fakeDial(proto, addr string) (conn net.Conn, err error) {
	return net.Dial("unix", "/tmp/vscode.sock")
}

func main() {
	tr := &http.Transport{
		Dial: fakeDial,
	}

	remote, err := url.Parse("http://localhost")
	if err != nil {
		log.Fatal(err)
	}
	proxy := httputil.NewSingleHostReverseProxy(remote)
	proxy.Transport = tr
	handler := func(p *httputil.ReverseProxy) func(http.ResponseWriter, *http.Request) {
		return func(w http.ResponseWriter, r *http.Request) {
			log.Println(r.URL)
			r.Host = remote.Host
			w.Header().Set("X-Ben", "Rad")
			p.ServeHTTP(w, r)
		}
	}
	mux := http.NewServeMux()
	mux.HandleFunc("/", handler(proxy))
	log.Println(http.ListenAndServe(":8090", mux))
}