from functools import wraps from django.utils.cache import patch_vary_headers def vary_on_headers(*headers): """ A view decorator that adds the specified headers to the Vary header of the response. Usage: @vary_on_headers('Cookie', 'Accept-language') def index(request): ... Note that the header names are not case-sensitive. """ def decorator(func): @wraps(func) def inner_func(*args, **kwargs): response = func(*args, **kwargs) patch_vary_headers(response, headers) return response return inner_func return decorator def vary_on_cookie(func): """ A view decorator that adds "Cookie" to the Vary header of a response. This indicates that a page's contents depends on cookies. Usage: @vary_on_cookie def index(request): ... """ @wraps(func) def inner_func(*args, **kwargs): response = func(*args, **kwargs) patch_vary_headers(response, ("Cookie",)) return response return inner_func