Can't access api post method, request always OPTIONS - php

Question

i'm trying to create login form with nuxtjs as front end and slim php as backend api, when i tried to access the API, i see the request method that i send is OPTIONS not POST, and in chrome dev console error shown that the request is blocked (CORS).
I know i have to set Access-Control-Allow-Methods add OPTIONS into it, but still failed, where to set that in nuxt js(nuxt.config) or slim php?
I have tried to access the api from postman and it work's just fine, i can see Access-Control-Allow-Methods headers has OPTIONS in it, but still it failed when i tried in vue apps
commons.app.js:434 OPTIONS http://localhost:8080/login 401 (Unauthorized)
Access to XMLHttpRequest at 'http://localhost:8080/login' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Code from slim php (API)
routes.php
// login routes
$app->post('/login', function (Request $request, Response $response, array $args) {
$input = $request->getParsedBody();
$sql = "SELECT * FROM groups
LEFT JOIN users_groups ON groups.groups_id = users_groups.users_groups_id
LEFT JOIN users ON users_groups.users_groups_id = users.id
WHERE users.email = :email";
$sth = $this->db->prepare($sql);
$sth->bindParam("email", $input['email']);
$sth->execute();
$user = $sth->fetchObject();
// verify email address.
if (!$user) {
$container->get('logger')->info("Error trying to login with email : ".$input['email']);
return $this->response->withJson(['error' => true, 'message' => 'These credentials do not match our records.']);
}
// verify password.
if (!password_verify($input['password'], $user->password)) {
$container->get('logger')->info("Error trying to login with password : ".$input['password']);
return $this->response->withJson(['error' => true, 'message' => 'These credentials do not match our records.']);
}
// cek apakah sudah login sebelumnya hari ini untuk user ini
$absensiSql = "SELECT * FROM users_presensi WHERE user_id = :userID";
$sth = $this->db->prepare($absensiSql);
$sth->bindParam("userID", $user->id);
$sth->execute();
$absensi = $sth->fetchObject();
// jika belum absen, masukan user ke absensi
if(!$absensi){
$status = 1;
$absensiSql = "INSERT INTO users_presensi(user_id, statuss) VALUES (:userID, :statuss)";
$sth = $this->db->prepare($absensiSql);
$sth->bindParam("userID", $user->id);
$sth->bindParam("statuss", $status);
$sth->execute();
// $absensi = $sth->fetchObject();s
}
$settings = $this->get('settings'); // get settings array.
$token = JWT::encode(['id' => $user->id, 'email' => $user->email, 'level' => $user->groups_level], $settings['jwt']['secret'], "HS256");
// i already set the header here
return $this->response
->withHeader('Access-Control-Allow-Origin', '*')
->withHeader('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type, Accept, Origin, Authorization')
->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS')
->withHeader('Set-Cookie', "token=$token; httpOnly")
->withJson(['token' => $token]);
})->setName('login');
my nuxtjs auth config
nuxt.config.js
/*
** Nuxt.js modules
*/
modules: [
'#nuxtjs/vuetify',
// Doc: https://axios.nuxtjs.org/usage
'#nuxtjs/axios',
'#nuxtjs/pwa',
'#nuxtjs/eslint-module',
'#nuxtjs/auth'
],
/*
** Axios module configuration
** See https://axios.nuxtjs.org/options
*/
axios: {
},
/**
* set auth middleware
*/
router: {
middleware: ['auth']
},
auth: {
strategies: {
local: {
endpoints: {
login: { url: 'http://localhost:8080/login', method: 'post', propertyName: 'token' }
}
// tokenRequired: true,
// tokenType: 'bearer'
}
}
}
method login from login.vue
loginPost: function () {
this.$auth.loginWith('local', {
data: {
username: this.loginData.username,
password: this.loginData.password
}
})
}
in postman, the result is token itself, and i think there shouldn't be cors error happen, but who's know.

Answer 1

I don't know about other browsers, but I know that Chrome does not support using localhost in your Access-Control-Allow-Origin header. What you should do is in your dev environment only tell it to accept all origins ->withHeader('Access-Control-Allow-Origin', '*')
The OPTIONS request is what is sent out in preparation for the browser sending out the real request to determine what the CORS rules are.