package main
import (
    "fmt"
    "net/http"
    "time"
)
func handler(response http.ResponseWriter, request *http.Request) {
    time.Sleep(time.Second * 5)
    fmt.Fprintf(response, "Hello, %s!", request.URL.Path[1:])
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8001", nil)
}