Passport strategy for authenticating with Slack using the V2 OAuth 2.0 API.
Updated to support Sign in with Slack by default.
$ npm install @workablehr/passport-slack-v2const {CLIENT_ID, CLIENT_SECRET, PORT} = process.env,
SlackStrategy = require('passport-slack-v2').Strategy,
passport = require('passport'),
express = require('express'),
app = express();
// setup the strategy using defaults
passport.use(new SlackStrategy({
clientID: CLIENT_ID,
clientSecret: CLIENT_SECRET
}, (accessToken, refreshToken, profile, done) => {
// optionally persist profile data
done(null, profile);
}
));
const app = express();
app.use(passport.initialize());
app.use(express.urlencoded({ extended: true }));
// path to start the OAuth flow
app.get('/auth/slack', passport.authorize('slack'));
// OAuth callback url
app.get('/auth/slack/callback',
passport.authorize('slack', { failureRedirect: '/login' }),
(req, res) => res.redirect('/')
);
app.listen(PORT);{
"ok": true,
"user": {
"id": "W012A3CDE",
"team_id": "T012AB3C4",
"name": "spengler",
"deleted": false,
"color": "9f69e7",
"real_name": "Egon Spengler",
"tz": "America/Los_Angeles",
"tz_label": "Pacific Daylight Time",
"tz_offset": -25200,
"profile": {
"avatar_hash": "ge3b51ca72de",
"status_text": "Print is dead",
"status_emoji": ":books:",
"real_name": "Egon Spengler",
"display_name": "spengler",
"real_name_normalized": "Egon Spengler",
"display_name_normalized": "spengler",
"email": "spengler@ghostbusters.example.com",
"image_original": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_24": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_32": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_48": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_72": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_192": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"image_512": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
"team": "T012AB3C4"
},
"is_admin": true,
"is_owner": false,
"is_primary_owner": false,
"is_restricted": false,
"is_ultra_restricted": false,
"is_bot": false,
"updated": 1502138686,
"is_app_user": false,
"has_2fa": false
}
}The Slack authentication strategy authenticates users using a Slack
account and OAuth 2.0 tokens. The strategy requires a verify callback, which
accepts these credentials and calls done providing a user, as well as
options specifying a client ID, client secret, and callback URL.
passport.use(new SlackStrategy({
clientID: CLIENT_ID,
clientSecret: CLIENT_SECRET,
skipUserProfile: false, // default
scope: [],
user_scope: [],
passReqToCallback: true
},
(accessToken, refreshToken, profile, done) => {
// optionally persist user data into a database
done(null, profile);
}
));Use passport.authenticate() (or passport.authorize() if you want to authenticate with Slack and NOT affect req.user and the user session), specifying the 'slack' strategy, to
authenticate requests.
For example, as route middleware in an Express application:
app.get('/auth/slack', passport.authorize('Slack'));
app.get('/auth/slack/callback',
passport.authenticate('slack', { failureRedirect: '/login' }),
(req, res) => res.redirect('/') // Successful authentication, redirect home.
);By default, the passport-slack-v2 strategy attempts to retrieve the user's identity from Slack. This action requires at least the following scopes users:read and users:read.email.
passport.use(new SlackStrategy({
clientID: CLIENT_ID,
clientSecret: CLIENT_SECRET,
user_scope: ['users:read', 'users:read.email']
}, () => { }));For bot scopes, set the scope parameter to an array of the desired scopes.
passport.use(new SlackStrategy({
clientID: CLIENT_ID,
clientSecret: CLIENT_SECRET,
scope: ['channels:manage', 'groups:write', 'im:write', 'mpim:write']
}, () => { }));If you only need an access token and no user profile data, you can avoid getting profile information by setting skipUserProfile to true.
passport.use(new SlackStrategy({
clientID: CLIENT_ID,
clientSecret: CLIENT_SECRET,
scope: ['incoming-webhook'],
skipUserProfile: true
}, () => { });