Firebase Auth JS/PHP

Question

I\'ve been tasked to build a web interface for an Android app based on firebase. I\'ve got a handful of endpoints, that interact with the database (Cloud functions). To acce

Answer 1

I have to admit, the complexity of the firebase docs and examples and different services, got me so confused, that I thought, authentication for the web is only possible via JavaScript. That was wrong. At least for my case, where I just login with email and password to retrieve a Json Web Token (JWT), to sign all calls to the Firebase cloud functions. Instead of juggling with weird Ajax requests or set the token cookie via JavaScript, I just needed to call the Firebase Auth REST API

Here is a minimal case using the Fatfreeframework:

Login form

Route

$f3->route('POST /auth', 'App->auth');

Controller

class App
{
    function auth()
    {
        $email = $this->f3->get('POST.email');
        $password = $this->f3->get('POST.password');

        $apiKey = 'API_KEY'; // see https://firebase.google.com/docs/web/setup

        $auth = new Auth($apiKey);
        $result = $auth->login($email,$password);

        if($result['success']){
            $this->f3->set('COOKIE.token',$result['idToken']);
            $this->f3->reroute('/dashboard');
        }else{
            $this->f3->clear('COOKIE.token');
            $this->f3->reroute('/');
        }
    }
}

Class

apiKey = $apiKey;
    }

    public function login($email,$password)
    {

        $client = new Client();
        // Create a POST request using google api
        $key = $this->apiKey;
        $responsee = $client->request(
            'POST',
            'https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyPassword?key=' . $key,
            [
                'headers' => [
                    'content-type' => 'application/json',
                    'Accept' => 'application/json'
                ],
                'body' => json_encode([
                    'email' => $email,
                    'password' => $password,
                    'returnSecureToken' => true
                ]),
                'exceptions' => false
            ]
        );

        $body = $responsee->getBody();
        $js = json_decode($body);

        if (isset($js->error)) {
            return [
                'success' => false,
                'message' => $js->error->message
            ];
        } else {
            return [
                'success' => true,
                'localId' => $js->localId,
                'idToken' => $js->idToken,
                'email' => $js->email,
                'refreshToken' => $js->refreshToken,
                'expiresIn' => $js->expiresIn,
            ];

        }

    }

}

Credits