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package graceful
import (
"net"
"time"
)
type keepAliveConn interface {
SetKeepAlive(bool) error
SetKeepAlivePeriod(d time.Duration) error
}
// keepAliveListener sets TCP keep-alive timeouts on accepted
// connections. It's used by ListenAndServe and ListenAndServeTLS so
// dead TCP connections (e.g. closing laptop mid-download) eventually
// go away.
type keepAliveListener struct {
net.Listener
keepAlivePeriod time.Duration
}
func (ln keepAliveListener) Accept() (net.Conn, error) {
c, err := ln.Listener.Accept()
if err != nil {
return nil, err
}
kac := c.(keepAliveConn)
kac.SetKeepAlive(true)
kac.SetKeepAlivePeriod(ln.keepAlivePeriod)
return c, nil
}
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