test.go

package main

import (
	"io"
	"log"
	"net"
)

func handleConnection(conn net.Conn) {
	io.WriteString(conn, "HTTP/1.1 2000000000000000000000000000000000000000000000000000000000000000 OK\r\nConnection: close\r\nContent-Length: 5\r\n\r\nSuccess\r\n")
	conn.Close()
}

func main() {
	ln, err := net.Listen("tcp", ":8080")
	if err != nil {
		log.Fatal(err)
	}
	for {
		conn, err := ln.Accept()
		if err != nil {
			continue
		}
		go handleConnection(conn)
	}
}