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const express = require('express'); |
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const app = express(); |
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const port = 3000; |
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// Display the Sign in with Slack button |
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app.get('/sign-in', async (_, res) => { |
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// TODO: adding one-time state parameter as well |
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const scopes = "identity.basic,identity.email"; // don't mix other non-`identity.` scopes here |
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// if you already have another Redirect URL for "Add to Slack", you may need to pass redirect_uri as well |
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const url = `https://slack.com/oauth/v2/authorize?user_scope=${scopes}&client_id=${process.env.SLACK_CLIENT_ID}`; |
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res.status(200) |
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.header('Content-Type', 'text/html; charset=utf-8') |
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// https://api.slack.com/docs/sign-in-with-slack#generator |
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.send(`<html> |
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<body> |
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<a href="${url}"><img alt="Sign in with Slack" height="40" width="172" src="https://platform.slack-edge.com/img/sign_in_with_slack.png" srcset="https://platform.slack-edge.com/img/sign_in_with_slack.png 1x, https://platform.slack-edge.com/img/[email protected] 2x" /></a> |
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</body> |
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</html> |
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`); |
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}); |
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// Verify the installation |
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const { WebClient } = require('@slack/web-api'); |
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const client = new WebClient(); |
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app.get('/sign-in-callback', async (req, res) => { |
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// TODO: verify state parameter |
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try { |
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const response = await client.oauth.v2.access({ |
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client_id: process.env.SLACK_CLIENT_ID, |
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client_secret: process.env.SLACK_CLIENT_SECRET, |
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code: req.query.code, |
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}); |
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console.log(response); |
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const identity = await client.users.identity({ |
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token: response.authed_user.access_token |
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}); |
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console.log(identity); |
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// Now you can assume this user logged in with his/her Slack account |
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// TODO: set-cookie etc |
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res.status(200).send("You've logged in with your Slack account!"); |
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} catch (e) { |
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console.log(e); |
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res.status(500).send("Something wrong!"); |
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} |
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}); |
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app.listen(port, () => { |
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console.log(`Example app listening at http://localhost:${port}`) |
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}); |
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