gistfile1.go

=========================客户端
package main

import "net/http"

func main() {
  req, _ := http.NewRequest("GET", "http://localhost:12346/aaa", nil)
  req.Header.Set("User-Agent", "abc")
  http.DefaultClient.Do(req)
}

===========================第一个服务器
package main

import (
  "net/http"
  "log"
  "os"
)

func main() {

  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    http.Redirect(w, r, "http://localhost:12347", 302)
  })

  log.Fatal(http.ListenAndServe(os.Args[1], nil))
}

================另一个服务端
nc -l 12347