Go Ginに入門してみる

Go

Quickstart | Gin Web Framework

go get -u github.com/gin-gonic/gin

main.go

package main
 
import "github.com/gin-gonic/gin"
 
func main() {
	r := gin.Default()
	r.GET("/ping", func(c *gin.Context) {
		c.JSON(200, gin.H{
			"message": "pong",
		})
	})
	r.Run() // listen and serve on 0.0.0.0:8080
}

Graceful shutdownを実装する

https://gin-gonic.com/docs/examples/graceful-restart-or-stop/

Go http.ServerのGraceful shutdown

middleware

middlewareには gin.HandlerFunc を実装している関数を渡す

func Logger() gin.HandlerFunc {
	return func(c *gin.Context) {
		t := time.Now()
 
		defer func() {
			elapsed := time.Since(t)
			fmt.Printf("elapsed: %v\n", elapsed)
 
		}()
 
		c.Next()
	}
}
 
func main() {
	r := gin.New()
	r.Use(Logger())
 
	r.GET("/test", func(c *gin.Context) {
		example := c.MustGet("example").(string)
 
		// it would print: "12345"
		log.Println(example)
	})
 
	// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}