I'm trying to write custom Authentication in tastypie. Basically, I want to do the authentication using the post parameters and I don't want to use the django auth at all, so my code looks something like:

class MyAuthentication(Authentication):
   def is_authenticated(self, request, **kwargs):
       if request.method == 'POST':
           token = request.POST['token']
           key = request.POST['key']
           return is_key_valid(token,key)

This is more or less the idea. The problem is that I keep getting the following error:

"error_message": "You cannot access body after reading from request's data stream"

I understand that this is related to the fact that I'm accessing the POST, but I could not figure if there is a way to solve it. Any ideas? Thanks.

EDIT: Maybe I forgot the mention the most important thing. I'm handling form data using a trick I found in github. My resource derives from multipart resource

class MultipartResource(object):
    def deserialize(self, request, data, format=None):
        if not format:
            format = request.META.get('CONTENT_TYPE', 'application/json')

        if format == 'application/x-www-form-urlencoded':
            return request.POST

        if format.startswith('multipart'):
            data = request.POST.copy()
            data.update(request.FILES)
            return data
        return super(MultipartResource, self).deserialize(request, data, format)
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