Event hooks system doesn't allow hooking an requests that don't have a response

[allenhumphreys]

I'm using the hooks system to do distributed tracing. That means I need to end my span when the request completes, either with an error or not.

It seems that when a particular request encounters a read timeout, the response hooks won't be called.

The hooks system is nice because it allows capturing all requests including redirects or auth flows. But it seems like I might need to actually subclass the client to ensure potential errors are reported, which means I'll have to worry about the implementation details a bit more than is desirable.

[lovelydinosaur]

Hi @allenhumphreys

For more fine grained detail you could look at the trace extension... https://www.encode.io/httpcore/extensions/#trace

import httpx

def log(event_name, info):
    print(event_name, info)

client = httpx.Client()
resp = client.get("https://www.example.org/", extensions={"trace": log})

That's probably not really quite what you're looking for, but perhaps it'd be helpful?

I suppose the alternative might be adding an 'exception' event hook or something like that?

It'd also be interesting to take a look at what third party tracing packages exist for requests?