app/django/views/decorators/vary.py
author Todd Larsen <tlarsen@google.com>
Thu, 26 Feb 2009 04:29:56 +0000
changeset 1502 2fee94feef59
parent 54 03e267d67478
permissions -rw-r--r--
Remove the release.py module and just use the field in app.yaml.template. This is a DRY fix, to have the release /branches/ and /tags/ use a release version that is compatible with the app.yaml file "version:" field. Also, the steps for creating a release were simplified (with several steps removed), and the release procedure moved to app/README, since app/soc/release.py is now deleted. Patch by: Todd Larsen Review by: to-be-reviewed

try:
    from functools import wraps
except ImportError:
    from django.utils.functional import wraps  # Python 2.3, 2.4 fallback.

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):
        def inner_func(*args, **kwargs):
            response = func(*args, **kwargs)
            patch_vary_headers(response, headers)
            return response
        return wraps(func)(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):
            ...
    """
    def inner_func(*args, **kwargs):
        response = func(*args, **kwargs)
        patch_vary_headers(response, ('Cookie',))
        return response
    return wraps(func)(inner_func)