main.go

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"gotwarden/handlers"
	"gotwarden/util"
	"gotwarden/version"

	"github.com/joho/godotenv"
)

func init() {
	log.Print("Try to load .env ...")
	if err := godotenv.Load(); err != nil {
		log.Print("No .env file found")
	}
}

func main() {

	wardenCtx, err := handlers.Init(util.InitConfig())
	if err != nil {
		log.Fatalf("Impossible to load the context: %s", err)
	}

	srv := &http.Server{
		Addr:    fmt.Sprintf(":%s", wardenCtx.Port),
		Handler: wardenCtx.Router(),
	}

	log.Printf("Starting on port %s Gotwarden server version %s (commit %s) built at %s", wardenCtx.Port, version.Release, version.Commit, version.BuildTime)

	// Initializing the server in a goroutine so that
	// it won't block the graceful shutdown handling below
	go func() {
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("listen: %s\n", err)
		}
	}()

	// Wait for interrupt signal to gracefully shutdown the server with
	// a timeout of 3 seconds.
	quit := make(chan os.Signal)
	// kill (no param) default send syscall.SIGTERM
	// kill -2 is syscall.SIGINT
	// kill -9 is syscall.SIGKILL but can't be catch, so don't need add it
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	log.Println("Shutting down server...")

	// The context is used to inform the server it has 3 seconds to finish
	// the request it is currently handling
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		log.Fatal("Server forced to shutdown:", err)
	}

	log.Println("Server exiting")
}