What about `before_request` hook?

Didn’t find a correct place where to post my question.

Hook system is a cool idea but I’m wondered why there is no some kind of ‘before_request’ hook?

Let’s assume I want to create requests.Session, and do some preparation steps for upcoming requests (like body formatting or simply log what URL and method). One of possible ways to do that is to override requests.Session.request method, but adding one more hook sounds more reasonable. It is possible to put it here https://github.com/requests/requests/blob/master/requests/sessions.py#L623

Is there any reason of not having this hook? Or is there some appropriate way to execute some piece of code before each request within Session?

[joaoe]

Howdy.

If you support the concept of hooks in the requets API, they should be comprehensive and allow a lot of control over how the API works. So far only a “response” hook is partially useful.

My use case: I want to run the API in either capturing mode (write all responses to disk, for that the response hook works) or read back mode (for this case I’d need a “request” hook before the request is sent to produce a response. And/or, a global hook when a session is created so I can override the HTTPAdapters to an adapter that reads back from the cache.

Thank you.

[sigmavirus24]

This could also be useful for adding distributed tracing support to requests. I had thought about using a TransportAdapter for that though, so really before_request isn’t entirely necessary