golang HTTP notes

1. Golang HTTP notes

1.1. graceful shutdown

package main

import (
	"context"
	"net/http"
	"os"
	"os/signal"
	"time"

	"github.com/labstack/echo/v4"
	"github.com/labstack/gommon/log"
)

func main() {
    
    
	// Setup
	e := echo.New()
	e.Logger.SetLevel(log.INFO)
	e.GET("/", func(c echo.Context) error {
    
    
		time.Sleep(5 * time.Second)
		return c.JSON(http.StatusOK, "OK")
	})

	// Start server
	go func() {
    
    
		if err := e.Start(":1323"); err != nil && err != http.ErrServerClosed {
    
    
			e.Logger.Fatal("shutting down the server")
		}
	}()

	// Wait for interrupt signal to gracefully shutdown the server with a timeout of 10 seconds. 
	// Use a buffered channel to avoid missing signals as recommended for signal.Notify
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, os.Interrupt)
	<-quit
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	if err := e.Shutdown(ctx); err != nil {
    
    
		e.Logger.Fatal(err)
	}
}