Django request_finished signal

How to use request_started signal in djan开发者_开发百科go? I want to execute some commands before processing a http request or do django have a callback similar with rails before_filter?

Thanks

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Consider writing your own middleware instead.

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According to this doc you may use:

from django.core.signals import request_finished
from django.dispatch import receiver

@receiver(request_finished)
def my_callback(sender, **kwargs):
    # process