Code Review

[boatcoder]

if hasattr(request, 'cparam'):
        for k, v in request.cparam.items():
            params.append('{0}={1}'.format(k, v))

Doesn't take into account potential need for v to urlencoded....

Might be better to clone the QueryDict that is GET with mutable=True and update the QueryDict and urlencode the final result. This would also allow you to replace params vs just append params to the end of the URL....