package main
import (
"context"
"fmt"
"log"
"net/http"
"os"
"os/signal"
"time"
)
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
time.Sleep(10 * time.Second)
fmt.Fprintln(w, "Hello world!")
})
srv := &http.Server{Addr: ":8080", Handler: mux}
go func() {
if err := srv.ListenAndServe(); err != nil {
log.Printf("Server error: %s
", err)
}
}()
log.Println("Server listening on : " + srv.Addr)
stopChan := make(chan os.Signal)
signal.Notify(stopChan, os.Interrupt)
<-stopChan // wait for SIGINT
log.Println("Shutting down server...")
ctx, cancel := context.WithTimeout(
context.Background(),
30*time.Second)
srv.Shutdown(ctx)
cancel()
log.Println("Server gracefully stopped")
}
/*
2018/03/27 00:18:10 Server listening on : :8080
2018/03/27 00:19:56 Shutting down server...
2018/03/27 00:19:56 Server error: http: Server closed
2018/03/27 00:20:04 Server gracefully stopped
*/