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, 1024)
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, 1024 * 4) 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 == 0{
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, 1024)
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, 1024 * 4) 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
}
}
}
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