middlewares

Documentation

Index

• Variables
• func InitiateMiddlewaresDependencies()
• func RegisterMiddlewares()

Variables

var (
	// DB for database manipulation
	DB *gorm.DB
	// Cache for cache manipulation
	Cache *cache.CacheEngine
	// JWT used for jwt tokens creation and validation
	JWT *jwt.JWTUtil
)

var Auth gin.HandlerFunc = func(c *gin.Context) {

	token, err := JWT.ExtractToken(c)
	if err != nil {
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"message": "unauthorized",
		})
		return
	}

	_, err = JWT.ValidateToken(token)
	if err != nil {
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"message": "unauthorized",
		})
		return
	}

	payload, err := JWT.DecodeToken(token)
	if err != nil {
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"message": "unauthorized",
		})
		return
	}

	tokenRedisKey := fmt.Sprintf("%s-token", payload["userId"])
	res, err := Cache.Get(tokenRedisKey)

	if err != nil {
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"message": "unauthorized",
		})
		return
	}

	userId, _ := strconv.ParseInt(fmt.Sprintf("%s", res), 10, 64)
	// check db for user with given id
	var user models.User
	result := DB.Find(&user, userId)
	if result.Error != nil && errors.Is(result.Error, gorm.ErrRecordNotFound) {
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"message": "unauthorized",
		})
		return
	}

	c.Next()
}

MiddlewareExample is an example of a middleware gets executed before the request handler

var MiddlewareExample gin.HandlerFunc = func(c *gin.Context) {
	fmt.Println("I'm an example middleware!")

	c.Next()
}

MiddlewareExample is an example of a middleware gets executed before the request handler

Functions

func InitiateMiddlewaresDependencies

func InitiateMiddlewaresDependencies()

InitiateMiddlewaresDependencies to initiate the any dependency of the handlers

func RegisterMiddlewares

func RegisterMiddlewares()

RegisterMiddlewares helps you attach middlwares globally