Middleware for handling responses

[Tenzer]

I would like to add tracing to my bot, so I was looking at setting up middleware to add tracing to each request. It does however look like middleware only can be triggered for incoming requests and not for the outgoing responses.

Would it be possible to let middleware's hook into the response action? That way, a trace can be started in the middleware and attached to the context of the request, and then finalised when the response is being sent after the event has been handled.

Category (place an x in each of the [ ])

• slack_bolt.App and/or its core components
• slack_bolt.async_app.AsyncApp and/or its core components
• Adapters in slack_bolt.adapter
• Others

Requirements

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[seratch]

Hi @Tenzer, thanks for asking this question!

As you mentioned, a global middleware is not a right solution for this. A suggested way to do this is to have your own adapter. With your own adapter, you can hook the timings of the BotRequest construction from raw HTTP requests and the BoltResponse conversion to a valid HTTP/Socket Mode response.

Here is the built-in Flask adapter: https://github.com/slackapi/bolt-python/blob/v1.6.1/slack_bolt/adapter/flask/handler.py#L40-L41 At least, you can reuse to_bolt_request and to_flask_response. If you are not using Flask, you may be able to find the one you can use here. Also, refer to the document about implementing a custom adapter.

I hope this was helpful to you! if everything is clear, would you mind closing this issue?

[Tenzer]

Thank you! That's really helpful. I'll take a look at this next week. I'll close this ticket and get back if I've got further questions. Have a nice weekend.