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ADD console-based example

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florianheinemann committed Jul 14, 2018
1 parent a9c5121 commit 36741468da29021b6f38d082136d7fbf84fa4f13
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/*
A simple example of Passwordless that requires no configuration and no database.
Hence, this is perfect to give Passwordless a quick spin.
Just run 'npm install' and then 'npm start' within this directory
*/

// Imports relevant packages
const express = require('express');
const app = express();
const session = require('express-session')
const passwordless = require('passwordless');
const MemoryStore = require('passwordless-memorystore');
const bodyParser = require('body-parser');

// Our user database. Typically, you'd store those in a database
const users = [
{ id: 1, email: 'marc@example.com' },
{ id: 2, email: 'alice@example.com' }
];

// Prepare express (add support for sessions and for receiving POST requests)
app.use(session({secret: 'foo', resave: false, saveUninitialized: true }))
app.use(bodyParser.urlencoded({ extended: false }));

// Prepare Passwordless and tell it that we want to store the temporary tokens in memory
passwordless.init(new MemoryStore());

// Tell Passwordless what to do when a user requests a token
// Here, we simply show a link with the token in the sever console
// In practice, we'd send an email or text message to the user
passwordless.addDelivery(
function(tokenToSend, uidToSend, recipient, callback) {
console.log('Access the account here:\n'
+ 'http://localhost:3000/'
+ '?token=' + tokenToSend + '&uid='
+ encodeURIComponent(uidToSend));
callback();
});

// Prepare Passwordless' session support and tell it
// to accept tokens on any URL
app.use(passwordless.sessionSupport());
app.use(passwordless.acceptToken({ successRedirect: '/'}));

// Display a login form
app.get('/', function(req, res) {
var userString = '';
if(req.user) {
userString = '<p>Hi, ' + findUserById(req.user).email + '</p>';
}

res.send('<html> \
<body> \
<h1>Passwordless Demo</h1>'
+ userString
+ '<h2>Login</h2> \
<form action="/sendtoken" method="POST"> \
Email: \
<br><input name="user" type="text"> \
<br><input type="submit" value="Login"> \
</form> \
</body> \
</html>');
});

// Accept the login form via POST
app.post('/sendtoken',
passwordless.requestToken(
function(user, delivery, callback) {
var currentUser = findUserByEmail(user);
callback(null, (currentUser) ? currentUser.id : null);
}
),
function(req, res) {
res.send('Sent - The token link has been sent to your server \
console. In practice, you would send it via email or text message!');
}
);

// Launch express
app.listen(3000, () => console.log('Example app listening on port 3000!'));

// Find a user via its email address
function findUserByEmail(email) {
for (var i = users.length - 1; i >= 0; i--) {
if(users[i].email === email.toLowerCase()) {
return users[i];
}
}
return null;
}

// Find a user by its ID
function findUserById(id) {
for (var i = users.length - 1; i >= 0; i--) {
if(users[i].id === parseInt(id, 10)) {
return users[i];
}
}
return null;
}
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