// Called by http.Server
func (lh *loggingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
g, err := guid.V4()
if err != nil {
msg := "logginghandler: couldn't create request GUID"
log.Errorln(msg)
http.Error(w, msg, http.StatusInternalServerError)
return
}
rw := &loggingResponseWriter{g, lh.loglevel, w}
log.Logf(lh.loglevel, "HTTP(%s) %s from %s for %s", g.Short(), r.Method, r.RemoteAddr, r.URL)
lh.Handler.ServeHTTP(rw, r)
}
// Serve on a given port
//
// The server will log to the default logger and will gracefully terminate on
// receipt of an interrupt or kill signal.
//
// The following URLs are defined:
// /
// /healthz
// /varz
// /streamz
// /birpc
// /debug/pprof
//
func ServeForever(port int) error {
addr := ":" + fmt.Sprint(port)
l, err := net.Listen("tcp", addr)
if err != nil {
log.Errorln("govtil/net/server: Failed to listen on", port, err)
return err
}
// Close listen port on signals (causes http.Serve() to return)
sigch := make(chan os.Signal)
signal.Notify(sigch, []os.Signal{
syscall.SIGABRT,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGKILL,
syscall.SIGPWR,
syscall.SIGQUIT,
syscall.SIGSTOP,
syscall.SIGTERM,
}...)
go func() {
sig := <-sigch
log.Println("govtil/net/server: Closing listen port", l.Addr().String(), "due to signal", sig)
l.Close()
}()
logginghandler := logginghandler.New(http.DefaultServeMux, log.NORMAL)
err = http.Serve(l, logginghandler)
if err != nil {
if vnet.SocketClosed(err) {
err = nil // closed due to signal, no error
} else {
log.Errorln("govtil/net/server:", err)
}
}
log.Println("govtil/net/server: Terminating")
return err
}
// Signallistener returns a net.Listener that will be closed when standard OS
// stop signals are received.
func SignalListener(port int) (net.Listener, error) {
addr := ":" + fmt.Sprint(port)
l, err := net.Listen("tcp", addr)
if err != nil {
log.Errorln("govtil/net: Failed to listen on", port, err)
return nil, err
}
// Close listen port on signals (causes http.Serve() to return)
signal.Go(func(s os.Signal) {
log.Debugf("govtil/net: Closing listen port %v due to signal %v", l.Addr().String(), s)
l.Close()
})
return l, nil
}