gistfile1.txt

package main

import (
	"embed"
	"html/template"
	"io/ioutil"
	"log"
	"net/http"
	"os"
)

//go:embed templates/*
var resources embed.FS

var t = template.Must(template.ParseFS(resources, "templates/*"))

func main() {
	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		uri := "http://localhost:8181/"
		resp, err := http.Get(uri)
		if err != nil {
			log.Fatalf("http.Get() failed with '%s'\n", err)
		}
		defer resp.Body.Close()
		d, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			log.Fatalf("ioutil.ReadAll() failed with '%s'\n", err)
		}
		data := map[string]string{
			"Region":    os.Getenv("FLY_REGION"),
			"LocalData": string(d),
		}

		t.ExecuteTemplate(w, "index.html.tmpl", data)
	})

	log.Println("listening on", port)
	log.Fatal(http.ListenAndServe(":"+port, nil))
}