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Consolidate TCPKeepalive in server.Serve (#1320) #1324

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merged 1 commit into from
Jun 20, 2022
Merged

Consolidate TCPKeepalive in server.Serve (#1320) #1324

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71 changes: 21 additions & 50 deletions server.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1554,34 +1554,6 @@ func (s *Server) getNextProto(c net.Conn) (proto string, err error) {
return
}

// tcpKeepAliveListener sets TCP keep-alive timeouts on accepted
// connections. It's used by ListenAndServe, ListenAndServeTLS and
// ListenAndServeTLSEmbed so dead TCP connections (e.g. closing laptop mid-download)
// eventually go away.
type tcpKeepaliveListener struct {
*net.TCPListener
keepalive bool
keepalivePeriod time.Duration
}

func (ln tcpKeepaliveListener) Accept() (net.Conn, error) {
tc, err := ln.AcceptTCP()
if err != nil {
return nil, err
}
if err := tc.SetKeepAlive(ln.keepalive); err != nil {
tc.Close() //nolint:errcheck
return nil, err
}
if ln.keepalivePeriod > 0 {
if err := tc.SetKeepAlivePeriod(ln.keepalivePeriod); err != nil {
tc.Close() //nolint:errcheck
return nil, err
}
}
return tc, nil
}

// ListenAndServe serves HTTP requests from the given TCP4 addr.
//
// Pass custom listener to Serve if you need listening on non-TCP4 media
Expand All @@ -1593,13 +1565,6 @@ func (s *Server) ListenAndServe(addr string) error {
if err != nil {
return err
}
if tcpln, ok := ln.(*net.TCPListener); ok {
return s.Serve(tcpKeepaliveListener{
TCPListener: tcpln,
keepalive: s.TCPKeepalive,
keepalivePeriod: s.TCPKeepalivePeriod,
})
}
return s.Serve(ln)
}

Expand Down Expand Up @@ -1638,13 +1603,6 @@ func (s *Server) ListenAndServeTLS(addr, certFile, keyFile string) error {
if err != nil {
return err
}
if tcpln, ok := ln.(*net.TCPListener); ok {
return s.ServeTLS(tcpKeepaliveListener{
TCPListener: tcpln,
keepalive: s.TCPKeepalive,
keepalivePeriod: s.TCPKeepalivePeriod,
}, certFile, keyFile)
}
return s.ServeTLS(ln, certFile, keyFile)
}

Expand All @@ -1664,13 +1622,6 @@ func (s *Server) ListenAndServeTLSEmbed(addr string, certData, keyData []byte) e
if err != nil {
return err
}
if tcpln, ok := ln.(*net.TCPListener); ok {
return s.ServeTLSEmbed(tcpKeepaliveListener{
TCPListener: tcpln,
keepalive: s.TCPKeepalive,
keepalivePeriod: s.TCPKeepalivePeriod,
}, certData, keyData)
}
return s.ServeTLSEmbed(ln, certData, keyData)
}

Expand Down Expand Up @@ -1910,7 +1861,27 @@ func (s *Server) Shutdown() error {

func acceptConn(s *Server, ln net.Listener, lastPerIPErrorTime *time.Time) (net.Conn, error) {
for {
c, err := ln.Accept()
var c net.Conn
var err error
if tl, ok := ln.(*net.TCPListener); ok && s.TCPKeepalive {
tc, err := tl.AcceptTCP()
if err != nil {
return nil, err
}
if err := tc.SetKeepAlive(s.TCPKeepalive); err != nil {
tc.Close() //nolint:errcheck
return nil, err
}
if s.TCPKeepalivePeriod > 0 {
if err := tc.SetKeepAlivePeriod(s.TCPKeepalivePeriod); err != nil {
tc.Close() //nolint:errcheck
return nil, err
}
}
c = tc
} else {
c, err = ln.Accept()
}
if err != nil {
if c != nil {
panic("BUG: net.Listener returned non-nil conn and non-nil error")
Expand Down