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63 lines (58 loc) · 980 Bytes
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Copy pathmain.go
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63 lines (58 loc) · 980 Bytes
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package main
import (
"io"
"os"
"sync"
cli "github.com/urfave/cli/v2"
"golang.org/x/net/context"
)
func main() {
app := &cli.App{
Commands: []*cli.Command{
{
Name: "server",
Flags: []cli.Flag{
&cli.StringFlag{Name: "bind", Value: "localhost:4242"},
},
Action: server,
},
{
Name: "client",
Flags: []cli.Flag{
&cli.StringFlag{Name: "addr", Value: "localhost:4242"},
},
Action: client,
},
},
}
if err := app.Run(os.Args); err != nil {
panic(err)
}
}
func readAndWrite(ctx context.Context, r io.Reader, w io.Writer, wg *sync.WaitGroup) <-chan error {
c := make(chan error)
go func() {
if wg != nil {
defer wg.Done()
}
buff := make([]byte, 1024)
for {
select {
case <-ctx.Done():
return
default:
nr, err := r.Read(buff)
if err != nil {
return
}
if nr > 0 {
_, err := w.Write(buff[:nr])
if err != nil {
return
}
}
}
}
}()
return c
}