Server

package main

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

func main()  {
	http.HandleFunc("/",handle)
	http.ListenAndServe("127.0.0.1:8005",nil)
}

func handle(w http.ResponseWriter,r *http.Request)  {
	url:=r.URL.String()
	fp,err:=os.Open("/Users/zmx/go/180726/src/main"+url)
	if err!=nil {
		w.Write([]byte(err.Error()))
		return
	}
	defer fp.Close()
	buf:=make([]byte,4096)
	for  {
		n,err:=fp.Read(buf)
		if err==io.EOF {
			break
		}
		w.Write(buf[:n])
	}
}
 

Client

package main

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

func main()  {
	resp,err:=http.Get("http://127.0.0.1:8005/index.go")
	if err!=nil {
		fmt.Print(err)
		return
	}
	defer resp.Body.Close()
	fmt.Println(resp.Status)
	fmt.Println(resp.StatusCode)
	fmt.Println(resp.Body)
	fmt.Println(resp.Header)
	buf:=make([]byte,4096)
	for  {
		n,err:=resp.Body.Read(buf)
		fmt.Print(string(buf[:n]))
		if err!=nil {
			if err==io.EOF {
				break
			} else {
				fmt.Print(err)
			}
		}
	}
}