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Use memcached to throttle POSTs

Author:
coleifer
Posted:
May 8, 2010
Language:
Python
Version:
1.1
Tags:
cache decorator
Score:
2 (after 2 ratings)

Problem: you want to limit posts to a view

This can be accomplished with a view decorator that stores hits by IP in memcached, incrementing the cached value and returning 403's when the cached value exceeds a certain threshold for a given IP.

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from django.utils.cache import cache
from django.http import HttpResponseForbidden

def throttle_post(func, duration=15):
    def inner(request, *args, **kwargs):
        if request.method == 'POST':
            remote_addr = request.META.get('HTTP_X_FORWARDED_FOR') or \
                          request.META.get('REMOTE_ADDR')
            key = '%s.%s' % (remote_addr, request.get_full_path())
            if cache.get(key):
                return HttpResponseForbidden('Try slowing down a little.')
            else:
                cache.set(key, 1, duration)
        return func(request, *args, **kwargs)
    return inner

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Comments

tttallis (on August 23, 2011):
<p>I think the first line should be:</p> <p>from django.core.cache import cache</p>

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