golang获取请求参数

package main
import (
  "net/http"
  "io/ioutil"
  "fmt"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request){

        buf := make([]byte, 1024)
        n, _ := r.Body.Read(buf)
        fmt.Println(string(buf[0:n]))
        // 或者
        body, _ := ioutil.ReadAll(r.Body)
        fmt.Println(string(body))

        fmt.Fprintf(w, "Hello golang!")     
    })