package main

import (
  "log"
  "net/http"
  "net/http/httputil"
  "net/url"
  "time"
)

func main() {
  // setup base http server                                                     
  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    http.Redirect(w, r, "/redirectURL", http.StatusFound)
  })
  go func() { log.Fatal(http.ListenAndServe("localhost:1024", nil)) }()

  // setup reverse proxy                                                        
  url, err := url.Parse("http://localhost:1024/")
  if err != nil {
    log.Fatal(err)
  }
  rp := httputil.NewSingleHostReverseProxy(url)
  rp.FlushInterval = -1
  rpServ := &http.Server{
    Addr:    "localhost:1025",
    Handler: http.TimeoutHandler(rp, time.Minute, "msg"),
  }
  go func() { log.Fatal(rpServ.ListenAndServe()) }()

  // send request                                                               
  c := &http.Client{
    CheckRedirect: func(req *http.Request, via []*http.Request) error {
      return http.ErrUseLastResponse
    },
  }
  resp, err := c.Get("http://localhost:1025/")
  if err != nil {
    log.Fatal(err)
  }
  if resp.StatusCode != http.StatusFound {
    log.Fatalf("expected %d. found: %d", http.StatusFound,
      resp.StatusCode)
  }
  log.Printf("success: %d", resp.StatusCode)
}