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# -*- coding: utf-8 -*-
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"""
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werkzeug.contrib.limiter
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~~~~~~~~~~~~~~~~~~~~~~~~
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A middleware that limits incoming data. This works around problems with
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Trac_ or Django_ because those directly stream into the memory.
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.. _Trac: http://trac.edgewall.org/
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.. _Django: http://www.djangoproject.com/
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:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
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:license: BSD, see LICENSE for more details.
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"""
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from warnings import warn
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from werkzeug.wsgi import LimitedStream
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class StreamLimitMiddleware(object):
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"""Limits the input stream to a given number of bytes. This is useful if
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you have a WSGI application that reads form data into memory (django for
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example) and you don't want users to harm the server by uploading tons of
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data.
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Default is 10MB
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.. versionchanged:: 0.9
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Deprecated middleware.
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"""
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def __init__(self, app, maximum_size=1024 * 1024 * 10):
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warn(DeprecationWarning('This middleware is deprecated'))
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self.app = app
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self.maximum_size = maximum_size
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def __call__(self, environ, start_response):
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limit = min(self.maximum_size, int(environ.get('CONTENT_LENGTH') or 0))
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environ['wsgi.input'] = LimitedStream(environ['wsgi.input'], limit)
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return self.app(environ, start_response)
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