05-Web服务器练习

package main


import (
	"fmt"
	"net/http"
	"os"
)


func OpenSendFile(fName string, w http.ResponseWriter) {
	//pathFileName := "C:/itcast/test" + fNmae
	pathFileName := "./05-Web服务器练习" + fName
	fmt.Println("地址:",pathFileName)
	f, err := os.Open(pathFileName)
	if err != nil {
		fmt.Println("Open err :", err)
		w.Write([]byte("No such file or directol"))
		return
	}

	defer f.Close()
	buf := make([]byte,4096)
	for {
		n, _ := f.Read(buf)  // 从本地将文件内容读取
		if n == 0{
			return
		}
		w.Write(buf[:n])              // 写到客户端(浏览器)上
	}
}



func myHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Println("客户端请求。 ", r.URL)
	OpenSendFile(r.URL.String(), w)
}



func main() {
	//注册回调函数。该回调函数会在服务器被访问时,自动被调用。
	//http.HandleFunc("/itcast", myHandler)
	http.HandleFunc("/", myHandler)

	//绑定服务器监听地址
	http.ListenAndServe("127.0.0.1:8000",  nil)
}