获取文件信息需要用到os. Stat接口，发送文件前开启接收者（服务端），启动客户端先发送文件名给接收者，接收者收到文件名返回确认信息"ok",才读取本地文件 发送给接收者。
发送者：
package main import (
"fmt"
"io"
"net"
"os"
) func main() {
fmt.Println("请输入接收者地址(IP:PORT)：")
var addr string
fmt.Scan(&addr)
fmt.Println("请输入需要传输的文件：")
var path string
fmt.Scan(&path)
info, errf := os.Stat(path)
if errf != nil{
fmt.Println("os.Stat errf =", errf)
return
} conn, err := net.Dial("tcp", addr)
if err != nil{
fmt.Println("net.Dial err =",err)
return
}
defer conn.Close() _, err = conn.Write([]byte(info.Name()))
if err != nil{
fmt.Println("conn.Write info.Name err =",err)
return
}
var n int
buf := make([]byte, )
n, err = conn.Read(buf)
if err != nil{
fmt.Println("conn.Read ok err =", err)
return
}
if "ok" == string(buf[:n]){
fmt.Println("ok")
SendFile(path, conn)
}
} func SendFile(path string, conn net.Conn){
file , err := os.Open(path) if err != nil{
fmt.Println("os.Open err =", err)
return
}
defer file.Close()
buf := make([]byte, * ) for {
n, err := file.Read(buf)
if err != nil{
if err == io.EOF{
fmt.Println("文件发送完毕")
} else{
fmt.Println("file.Read err =",err)
} return
}
if n == {
fmt.Println("文件发送完毕")
break
}
conn.Write(buf[:n])
}
}
接收者：
package main import (
"fmt"
"io"
"net"
"os"
) func main() {
fmt.Println("请你的地址(IP:PORT)：")
var addr string
fmt.Scan(&addr)
listenner, err := net.Listen("tcp", addr)
if err != nil{
fmt.Println("net.Listen err =", err)
return
}
defer listenner.Close() conn, errl := listenner.Accept()
if errl != nil{
fmt.Println("listenner.Accept err =", errl)
return
}
var n int
buf := make([]byte, )
n, err = conn.Read(buf)
if err != nil{
fmt.Println("conn.Read fileName err =", err)
return
}
fileName := string(buf[:n])
n, err = conn.Write([]byte("ok"))
if err != nil{
fmt.Println("conn.Write ok err =", err)
return
} RecvFile(fileName, conn)
} func RecvFile(fileName string, conn net.Conn){
file , err := os.Create(fileName)
if err != nil{
fmt.Println("os.Create err =", err)
return
} defer file.Close() buf := make([]byte, * )
for{
n, err := conn.Read(buf)
if err != nil{
if err == io.EOF{
fmt.Println("文件接收完成")
} else {
fmt.Println("conn.Read err =", err)
}
return
} n, err = file.Write(buf[:n])
if err != nil{
fmt.Println("file.Write err =", err)
break
}
}
}