rkt-foo/hello.go

package main

import (
  "log"
  "net/http"
)

func main() {
  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    log.Printf("request from %v\n", r.RemoteAddr)
    w.Write([]byte("hello\n"))
  })
  log.Fatal(http.ListenAndServe(":5000", nil))
}