/
listener.go
37 lines (33 loc) · 1.02 KB
/
listener.go
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package server
import (
"net"
"time"
)
// tcpKeepAliveListener 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 tcpKeepAliveListener struct {
*net.TCPListener
}
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
if c, err = ln.AcceptTCP(); err != nil {
return
} else if err = c.(*net.TCPConn).SetKeepAlive(true); err != nil {
return
}
// Ignore error from setting the KeepAlivePeriod as some systems, such as
// OpenBSD, do not support setting TCP_USER_TIMEOUT on IPPROTO_TCP
_ = c.(*net.TCPConn).SetKeepAlivePeriod(3 * time.Minute)
return
}
func newListener(address, network string) (*tcpKeepAliveListener, error) {
if network != "tcp" && network != "tcp4" && network != "tcp6" {
return nil, ErrInvalidListenerNetwork
}
l, err := net.Listen(network, address)
if err != nil {
return nil, err
}
return &tcpKeepAliveListener{l.(*net.TCPListener)}, nil
}