为什么每次请求都执行两次？fmt.Println("请求:", (i))会打印两次

```go package main import ( "net/http" "fmt" "strconv" ) var writera http.ResponseWriter var i int64 = 0 func main() { http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) { fmt.Println("请求:", (i)) i++ writera = writer name := request.FormValue("name") outHtml("name=" + name) }) port2 := 82 fmt.Println("http://localhost:" + strconv.Itoa(port2)) http.ListenAndServe(":"+strconv.Itoa(port2), nil) } func outHtml(c ...interface{}) { for _, v := range c { fmt.Fprintln(writera, v) fmt.Println() } } ```