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from django.middleware.csrf import CsrfViewMiddleware
from django.utils.decorators import decorator_from_middleware, available_attrs
try:
from functools import wraps
except ImportError:
from django.utils.functional import wraps # Python 2.4 fallback.
csrf_protect = decorator_from_middleware(CsrfViewMiddleware)
csrf_protect.__name__ = "csrf_protect"
csrf_protect.__doc__ = """
This decorator adds CSRF protection in exactly the same way as
CsrfViewMiddleware, but it can be used on a per view basis. Using both, or
using the decorator multiple times, is harmless and efficient.
"""
def csrf_response_exempt(view_func):
"""
Modifies a view function so that its response is exempt
from the post-processing of the CSRF middleware.
"""
def wrapped_view(*args, **kwargs):
resp = view_func(*args, **kwargs)
resp.csrf_exempt = True
return resp
return wraps(view_func, assigned=available_attrs(view_func))(wrapped_view)
def csrf_view_exempt(view_func):
"""
Marks a view function as being exempt from CSRF view protection.
"""
# We could just do view_func.csrf_exempt = True, but decorators
# are nicer if they don't have side-effects, so we return a new
# function.
def wrapped_view(*args, **kwargs):
return view_func(*args, **kwargs)
wrapped_view.csrf_exempt = True
return wraps(view_func, assigned=available_attrs(view_func))(wrapped_view)
def csrf_exempt(view_func):
"""
Marks a view function as being exempt from the CSRF checks
and post processing.
This is the same as using both the csrf_view_exempt and
csrf_response_exempt decorators.
"""
return csrf_response_exempt(csrf_view_exempt(view_func))
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