http request body leak

http.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	_ "net/http/pprof"
	"time"
)

func NewHttpService() {
	go func() {
		log.Println(http.ListenAndServe("localhost:6060", nil))
	}()
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("Hello, world!"))
	})
	err := http.ListenAndServe(":8081", nil)
	if err != nil {
		log.Println("http.ListenAndServe err:", err)
	}
}

func main() {
	go NewHttpService()
	time.Sleep(1 * time.Second)
	for { // 模拟大量请求
		go makeRequest()
		time.Sleep(50 * time.Millisecond)
	}
}

func makeRequest() {
	client := &http.Client{}
	req, err := http.NewRequest(http.MethodGet, "http://localhost:8081", nil)
	res, err := client.Do(req)
	if err != nil {
		fmt.Println(err)
	}
	_, err = ioutil.ReadAll(res.Body)
	// defer res.Body.Close()
	if err != nil {
		fmt.Println(err)
	}
}