优雅地关闭 Go HTTP 服务
Go 1.8 之后，http.Server 增加了 Shutdown 函数，类似于第三方的 graceful 插件一样，可以平滑的关闭自身 HTTP 服务了，我们看看代码：
package main
import (
"context"
"github.com/urfave/negroni"
"log"
"net/http"
"os"
"os/signal"
"time"
)
func main(){
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "Welcome to the home page!")
})
n := negroni.Classic()
n.UseHandler(mux)
srv := &http.Server{
Addr: ":3000",
Handler: n,
ReadTimeout: time.Second * 15,
WriteTimeout: time.Second * 15,
IdleTimeout: time.Second * 60,
MaxHeaderBytes: 1 << 20,
}
go func() {
if err := srv.ListenAndServe(); err != nil {
log.Fatalf("listen and serve http server fail:\n %s\n", err)
}
}()
exit := make(chan os.Signal, 1)
signal.Notify(exit, os.Interrupt)
<-exit
log.Println("it will shut down.")
ctx, _ := context.WithTimeout(context.Background(), time.Second*15)
err := srv.Shutdown(ctx)
log.Println("it shutting down.\n", err)
os.Exit(0)
}
哇~~~ 竟然还没有评论！