internal: cleanup logging, remove duplicate code

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/utils/web/keepalive.go

@@ -0,0 +1,32 @@
+package web
+
+import (
+	"net"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// 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() (net.Conn, error) {
+	tc, err := ln.AcceptTCP()
+	if err != nil {
+		return nil, err
+	}
+	err = tc.SetKeepAlive(true)
+	if err != nil {
+		log.WithError(err).Warning("Error setting Keep-Alive")
+	}
+	err = tc.SetKeepAlivePeriod(3 * time.Minute)
+	if err != nil {
+		log.WithError(err).Warning("Error setting Keep-Alive period")
+	}
+	return tc, nil
+}