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main.go
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main.go
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package main
import (
"bytes"
"crypto/rand"
"encoding/binary"
"fmt"
"io"
"log"
"net"
// "time"
)
type FileServer struct{}
func (fs *FileServer) start() {
ln, err := net.Listen("tcp", ":3000")
if err != nil {
log.Fatal(err)
}
for {
conn, err := ln.Accept()
if err != nil {
log.Fatal(err)
}
go fs.readLoop(conn)
}
}
func (fs *FileServer) readLoop(conn net.Conn) {
buf := new(bytes.Buffer)
for {
var size int64
binary.Read(conn, binary.LittleEndian, &size)
n, err := io.CopyN(buf,conn, size)
if err != nil {
log.Fatal(err)
}
fmt.Println(buf.Bytes())
fmt.Printf("Bytes read over the network %d", n)
}
}
func sendFile(size int) error {
file := make([]byte, size)
_, err := io.ReadFull(rand.Reader, file)
if err != nil {
return err
}
conn, err := net.Dial("tcp", ":3000")
if err != nil {
return err
}
binary.Write(conn, binary.LittleEndian, int64(size))
n, err := io.CopyN(conn, bytes.NewReader(file), int64(size))
if err != nil {
return err
}
fmt.Printf("Written %d bytes over network\n", n)
return nil
}
func main() {
go func() {
// time.Sleep(1 * time.Second)
sendFile(400000)
}()
server := &FileServer{}
server.start()
}