email validation express code example
Example 1: express validator
const { validationResult, check } = require('express-validator')
exports.resultsValidator = (req) => {
const messages = []
if (!validationResult(req).isEmpty()) {
const errors = validationResult(req).array()
for (const i of errors) {
messages.push(i)
}
}
return messages
}
exports.registerValidator = () => {
return [
check('username')
.notEmpty()
.withMessage('username is required')
.not()
.custom((val) => /[^A-za-z0-9\s]/g.test(val))
.withMessage('Username not use uniq characters'),
check('password')
.notEmpty()
.withMessage('password is required')
.isLength({ min: 8 })
.withMessage('password must be 8 characters')
]
}
exports.loginValidator = () => {
return [
check('username').notEmpty().withMessage('username or email is required'),
check('password').notEmpty().withMessage('password is required')
]
}
const errors = resultsValidator(req)
if (errors.length > 0) {
return res.status(400).json({
method: req.method,
status: res.statusCode,
error: errors
})
}
route.post('/login', loginValidator(), (req, res) => {
return res.status(200).send('Login Sucessfuly');
});
route.post('/register', registerValidator(), (req, res) => {
return res.status(200).send('Register Sucessfuly');
});
Example 2: express-validator
const { body, validationResult } = require('express-validator');
app.post('/user', [
body('username').isEmail(),
body('password').isLength({ min: 5 })
], (req, res) => {
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(422).json({ errors: errors.array() });
}
User.create({
username: req.body.username,
password: req.body.password
}).then(user => res.json(user));
});