main.go

package main

import (
	"flag"
	"net/http"
	"strconv"
	"strings"
)

var (
	httpPort = flag.Int("http_port", 80, "HTTP port to serve on (defaults to 80)")
)

func main() {
	// Parse the flags
	flag.Parse()

	mux := http.NewServeMux()
	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		query := r.URL.Query()
		state := strings.Split(query.Get("state"), "-")[0]
		host := r.Host
		redir := "http://" + host + state
		http.Redirect(w, r, redir, 302)
	})

	http.ListenAndServe(":"+strconv.Itoa(*httpPort), mux)
}