django integration: fitering transactions by url

Problem Statement

I'm trying to reduce the noise in our transactions, by filtering out frequently reached but not interesting urls ( /health in my particular case)

Solution Brainstorm

I tried to use the trace_sampler function, but at the time it is called, the transaction has the generic name generic WSGI request , and the name is only overwritten later to contain the url.
I did not see any opportunity to drop the transaction after the first decision is made.
Am I right that there is currently no way to do such a filtering ?
Thanks!

@etienne-lebrun

hi @etienne-lebrun, for WSGI we include the wsgi_environ object inside sampling_context, so you can access the underlying request fields. Something like the following should work.

IGNORED_URLS = ["/ignore/this/url"]

def traces_sampler(sampling_context):
    path = sampling_context.get("wsgi_environ", {}).get("PATH_INFO", None)
    if path and path in IGNORED_URLS:
        return 0
    else:
        return 1

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django integration: fitering transactions by url #1568

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django integration: fitering transactions by url #1568

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sl0thentr0py commented on Aug 16, 2022

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