http_server.go

// returns "hello world\n"
// 6g http_server.go
// 6l http_server.6 
// ./6.out

// benchmark w/ Apache Bench
// ab -n 2000 -c 200 http://localhost:1234/
package main

import (
	"flag"
	"http"
	"io"
	"log"
)

func main() {
	addr := flag.String("addr", ":1234", "http service address")
	flag.Parse()
	http.Handle( "/", http.HandlerFunc(HelloWorld) )
	err := http.ListenAndServe(*addr, nil)
	if err != nil {
		log.Exit("ListenAndServe: ", err)
	}
}

func HelloWorld(c *http.Conn, req *http.Request) {
    io.WriteString(c, "hello world\n")
}