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# -*- coding: utf-8 -*-
"""
werkzeug.contrib.limiter
~~~~~~~~~~~~~~~~~~~~~~~~
A middleware that limits incoming data. This works around problems with
Trac_ or Django_ because those directly stream into the memory.
.. _Trac: http://trac.edgewall.org/
.. _Django: http://www.djangoproject.com/
:copyright: (c) 2011 by the Werkzeug Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from warnings import warn
from werkzeug.wsgi import LimitedStream
class StreamLimitMiddleware(object):
"""Limits the input stream to a given number of bytes. This is useful if
you have a WSGI application that reads form data into memory (django for
example) and you don't want users to harm the server by uploading tons of
data.
Default is 10MB
"""
def __init__(self, app, maximum_size=1024 * 1024 * 10):
self.app = app
self.maximum_size = maximum_size
def __call__(self, environ, start_response):
limit = min(self.maximum_size, int(environ.get('CONTENT_LENGTH') or 0))
environ['wsgi.input'] = LimitedStream(environ['wsgi.input'], limit)
return self.app(environ, start_response)
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