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javascriptnode.jspassport.jsslack-apislack

passport-slack return Cannot GET /auth/slack

I'm developing an app that has slack signin functionality.

I'm using passport-slack for OAuth but having some problem about routing which return Cannot GET /auth/slack

I followed the step by step procedure which can be found in https://github.com/mjpearson/passport-slack but still no luck

My current code for passport is like this which I think I define the routes correctly

// setup the strategy using defaults
passport.use(new SlackStrategy({
  clientID: environment.SLACK.CLIENT_ID,
  clientSecret: environment.SLACK.CLIENT_SECRET,
  }, (accessToken, refreshToken, profile, done) => {
    done(null, profile);
}));

// path to start the OAuth flow
app.get('/auth/slack', passport.authenticate('slack'));

// OAuth callback url
app.get('/auth/slack/callback',
  passport.authenticate('slack', { successRedirect: '/',
  failureRedirect: '/login' }));
Solution

  • /auth/slack is just a middleware for authentication, which means all the routes begin with /auth/slack will invoke this middleware.

    Also because you don have any response for this route, and passport will just invoke the next() function, so Cannot GET /auth/slack

    You should put /auth/slack/callback in your slack settings, slack will redirect the user to this route after the user sign in on slack

    http://expressjs.com/en/guide/using-middleware.html