Class: Xeno::SlackController

Inherits:
ApiController
  • Object
show all
Defined in:
app/controllers/xeno/slack_controller.rb

Overview

The Slack Events API endpoint. The generic auth lambda is skipped — Slack's own request signature IS the authentication (verified in constant time), and it fails closed: no configured slack channel = 404, bad or stale signature = 401.

Constant Summary

Constants inherited from ApiController

ApiController::DEV_PRINCIPAL

Instance Method Summary collapse

Instance Method Details

#events ⇒ Object 



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# File 'app/controllers/xeno/slack_controller.rb', line 9

def events
  channel = Channels.registry[:slack]
  return head :not_found unless channel

  raw = request.raw_post
  unless channel.verify_signature(
    request.headers["X-Slack-Request-Timestamp"],
    request.headers["X-Slack-Signature"],
    raw
  )
    return head :unauthorized
  end

  payload = JSON.parse(raw)
  return render json: { challenge: payload["challenge"] } if payload["type"] == "url_verification"

  enqueue_event(payload)
  head :ok
end