Django middleware to rewrite a request?

I would like to write middleware (or some other method) for re-writing a request (AFAICT the contents of request.META['PATH_INFO']) before the URL resolver. This is so I could pick it up as a component of the URL and treat it as another view argument.

Something like this:

def process_request(self, request):
    request.META['PATH_INFO'] = "string to prefix/" + request.META['PATH_INFO']

But it looks like the URL resolver is getting in there first.

Is there any way to achieve this?

My middleware is installed as the first in the list.

EDIT: To clarify, I want to re-write this request:

http://something.com/my/view/ => /something.com/my/view http://somethingelse.com/my/view/ => /somethingelse.com/my/view etc in middleware before the url handler.

I am currently doing it with view decorators which modify the kwargs passed to the view funciton, but it doesn't quite feel right.

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Why? My app is handling requests from multiple domains and I would like a way to deduce the domain in middleware and have it passed 开发者_如何学编程in as a view argument.

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If you use wsgi, I think you can do the rewrite in the .wsgi script (that is before the request is given to django)