/
tcp.go
38 lines (34 loc) · 951 Bytes
/
tcp.go
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package server
import (
"net"
"time"
)
// TCPKeepAliveListener is a copy of tcpKeepAliveListener
// source: net/http/server.go
//
// 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
}
// Accept implements the Accept method in the Listener interface;
// it waits for the next call and returns a generic Conn.
func (ln TCPKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}
// getNewAddr lets the system discover a new port available
func getNewAddr() (string, error) {
addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
if err != nil {
return "", err
}
return addr.String(), nil
}