flyteplugins-slack

Receive Slack webhooks in Flyte.

pip install "flyteplugins-slack[app]"

Using it

Hand a SlackProvider() to a WebhookAppEnvironment and register handlers with the typed constants in events:

import flyte
from flyte.extras.webhooks import WebhookAppEnvironment, run_once
from flyteplugins.slack import SlackProvider, events

# SlackProvider.default_secret_env is mounted for you.
app_env = WebhookAppEnvironment(name="slack-webhooks", providers=[SlackProvider()])


@app_env.on_event(events.AppMention.ANY)
async def handle(event):
    import flyte.remote as remote

    task = remote.Task.get(name="my-env.my_task", auto_version="latest")
    result = await run_once.aio(task, key=event.dedupe_key(), resource=event.resource_id)
    if not result.created:
        return {"skipped": result.run.name, "url": result.run.url}
    return {"run": result.run.name}


flyte.serve(app_env)

Handlers must await run_once.aio(...). The blocking form stalls the app's event loop, and Slack times deliveries out in seconds.

One app can serve several products at once — hand it one provider per product.

Try it

examples/slack_webhooks.py runs two ways. The first needs no Slack account:

python examples/slack_webhooks.py --local   # replay a real sample delivery in-process
python examples/slack_webhooks.py           # deploy the receiver to Flyte

--local posts this plugin's SAMPLE_DELIVERY through the app with FastAPI's test client, so you see a delivery verified, normalized, and dispatched — plus an unsigned one refused with a 401, and the same delivery replayed to show the dedupe key is stable.

Setup

1. Store the secret and mount it on the app:

   flyte create secret SLACK_SIGNING_SECRET --value <secret>
   

2. Point Slack at <app-url>/webhook/slack, from api.slack.com/apps → Event Subscriptions, then subscribe to bot events.

Slack POSTs a url_verification challenge before events flow; it is echoed automatically, so the Request URL field verifies itself.

Verification: HMAC-SHA256 over v0:{timestamp}:{body}, with a five-minute replay window (X-Slack-Signature).

Messages are keyed per message, so each one launches its own run. To collapse a whole thread onto one run, pass event.payload["event"]["thread_ts"] as your own key.

Event constants

events spells every event this plugin can dispatch, as str enums grouped by event type, so a typo fails at import rather than by silently never matching. Raw strings still work, for events the constants do not cover yet.

What this plugin does not do

Call the Slack API. Use slack_sdk directly from your tasks — see examples/external_saas_integrations. This plugin owns only the part that is Flyte's: authenticating an inbound delivery and turning it into a run.