TextVariationMiddleware

Needs to be first in the list so it can properly modify the path information.

The middleware modifies the request

• Matches request path against the configured regular expressions
• If it matches, extract the dimensions and set into request.META[‘TEXT_VARIATIONS’]
• Join the unnamed groups in the matching regular expression with “/”
• Set request.path, request.path_info and request.META[‘PATH_INFO’] to the resulting value