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class RewriteMiddleware:

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    """

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        Trivial path rewrites.

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        rewrite: {

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            path: path

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        }

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        Only does exact matches.

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    """

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    def __init__ (self, app, rewrite):

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        self.app = app

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        self.rewrite = rewrite

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    def __call__ (self, environ, start_response):

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        environ['PATH_INFO'] = self.rewrite.get(environ['PATH_INFO'], environ['PATH_INFO'])

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        return self.app(environ, start_response)