Aula 10 - Golang - Fiber - Login do Usuário

Aula 10 - Golang - Fiber - Login

Vamos começar criando a rota do login.

fiber-project/routes/routes.go


package routes

import (
	"fiber-project/controllers"

	"github.com/gofiber/fiber/v2"
)

func Setup(app *fiber.App) {
	app.Post("/api/register", controllers.Register)
	app.Post("/api/login", controllers.Login)
}

E agora a função login() no fiber-project/controllers/authController.go.

fiber-project/controllers/authController.go

package controllers

import (
	"fiber-project/database"
	"fiber-project/models"

	"github.com/gofiber/fiber/v2"
	"golang.org/x/crypto/bcrypt"
)

func Register(c *fiber.Ctx) error {
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}
	if data["password"] != data["confirm_password"] {
		c.Status(400)
		return c.JSON(fiber.Map{
			"message": "Passwords do not match!",
		})
	}

	password, _ := bcrypt.GenerateFromPassword([]byte(data["password"]), 14)

	user := models.User{
		FirstName: data["first_name"],
		LastName:  data["last_name"],
		Email:     data["email"],
		Password:  password,
	}

	database.DB.Create(&user)
	return c.JSON(user)
}

func Login(c *fiber.Ctx) error {
	//get the request parameter
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}

	var user models.User
	//get user by email
	database.DB.Where("email = ?", data["email"]).First(&user)

	return c.JSON(user)

}

Agora faça um login teste, faça uma solicitação(request) do tipo POST, usando o Postman, ou Insomnia, ou nightingale, ... No meu caso, vou usar o Postman. Faça um login usando os dados certos de email e senha e veja que ele retorna o usuário, depois faça um teste passando o email incorreto por exemplo, ele retorna um Id = 0, e no console record not found. Vamos tratar esse caso então.

fiber-project/controllers/authController.go

package controllers

import (
	"fiber-project/database"
	"fiber-project/models"

	"github.com/gofiber/fiber/v2"
	"golang.org/x/crypto/bcrypt"
)

func Register(c *fiber.Ctx) error {
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}
	if data["password"] != data["confirm_password"] {
		c.Status(400)
		return c.JSON(fiber.Map{
			"message": "Passwords do not match!",
		})
	}

	password, _ := bcrypt.GenerateFromPassword([]byte(data["password"]), 14)

	user := models.User{
		FirstName: data["first_name"],
		LastName:  data["last_name"],
		Email:     data["email"],
		Password:  password,
	}

	database.DB.Create(&user)
	return c.JSON(user)
}

func Login(c *fiber.Ctx) error {
	//get the request parameter
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}

	var user models.User
	//get user by email
	database.DB.Where("email = ?", data["email"]).First(&user)

        //user not found
	if user.Id == 0 {
		c.Status(404)
		return c.JSON(fiber.Map{
			"message": "User not found!",
		})
	}

	return c.JSON(user)

}

Precisamos também conferir se o password digitado no login está correto.

fiber-project/controllers/authController.go

package controllers

import (
	"fiber-project/database"
	"fiber-project/models"

	"github.com/gofiber/fiber/v2"
	"golang.org/x/crypto/bcrypt"
)

func Register(c *fiber.Ctx) error {
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}
	if data["password"] != data["confirm_password"] {
		c.Status(400)
		return c.JSON(fiber.Map{
			"message": "Passwords do not match!",
		})
	}

	password, _ := bcrypt.GenerateFromPassword([]byte(data["password"]), 14)

	user := models.User{
		FirstName: data["first_name"],
		LastName:  data["last_name"],
		Email:     data["email"],
		Password:  password,
	}

	database.DB.Create(&user)
	return c.JSON(user)
}

func Login(c *fiber.Ctx) error {
	//get the request parameter
	var data map[string]string

	if err := c.BodyParser(&data); err != nil {
		return err
	}

	var user models.User
	//get user by email
	database.DB.Where("email = ?", data["email"]).First(&user)

        //user not found
	if user.Id == 0 {
		c.Status(404)
		return c.JSON(fiber.Map{
			"message": "User not found!",
		})
	}
        //incorrect password
        if err := bcrypt.CompareHashAndPassword(user.Password, []byte(data["password"])); err != nil {
		c.Status(400)
		return c.JSON(fiber.Map{
			"message": "Incorrect password!",
		})
	}
	return c.JSON(user)

}

Agora faça o teste passando o password errado.