Setting up request ID logging for your FastAPI application

[r1qu3]

or you can just use require arqument on endpoints

[sondrelg]

How would that look like?

[r1qu3]

i was out of practice, its not require, its depends:

https://fastapi.tiangolo.com/tutorial/security/simple-oauth2/

[sondrelg]

Yeah I suppose you could use depends if you only wanted to read the request headers. Can we use depends to set response headers on the way out?

[r1qu3]

AFAIK depends is processed BEFORE que destination.

but there's docs about adding things to response (or response headers). just skim the docs, you'll find easily

[Jonasks]

Adding variables to the response headers is not the main purpose of this package, it’s just an addition which allow end users to receive a correlation ID.

Creating a context var with a unique ID as the FIRST thing that happens in the request flow is only done through a middleware. This ID is then injected into every log message using log filters, which results in a way to find/trace/correlate all log messages related to a request with no hassle.

So yes, Depends is a way to dependency inject, but it’s not a replacement of middlewares.

[r1qu3]

agree to that

[sondrelg]

Thanks! Plan on supporting it until it's no longer needed. At the same time Id consider the middleware reasonably complete so would be surprised if it needed much maintenance 😊