django未登陆用户的请求进行拦截（非中间件的形式）

1. 拦截用户的请求的示列（1）：

def required(wrapping_functions,patterns_rslt):
'''
Used to require 1..n decorators in any view returned by a url tree

Usage:
urlpatterns = required(func,patterns(...))
urlpatterns = required((func,func,func),patterns(...))

Note:
Use functools.partial to pass keyword params to the required
decorators. If you need to pass args you will have to write a
wrapper function.

Example:
from functools import partial

urlpatterns = required(
partial(login_required,login_url='/accounts/login/'),
patterns(...)
)
'''
if not hasattr(wrapping_functions,'__iter__'):
wrapping_functions = (wrapping_functions,)

return [
_wrap_instance__resolve(wrapping_functions,instance)
for instance in patterns_rslt
]

def _wrap_instance__resolve(wrapping_functions,instance):
if not hasattr(instance,'resolve'): return instance
resolve = getattr(instance,'resolve')

def _wrap_func_in_returned_resolver_match(*args,**kwargs):
rslt = resolve(*args,**kwargs)

if not hasattr(rslt,'func'):return rslt
f = getattr(rslt,'func')

for _f in reversed(wrapping_functions):
# @decorate the function from inner to outter
f = _f(f)

4000
setattr(rslt,'func',f)

return rslt

setattr(instance,'resolve',_wrap_func_in_returned_resolver_match)

return instance

urlpatterns += required(
partial(login_required,login_url='/accounts/login/'),
urlpatterns
)

2.拦截用户请求的示列(2):

from django.core.urlresolvers import RegexURLPattern, RegexURLResolver
from django.conf.urls.defaults import patterns, url, include
from django.contrib import admin
from myproject.myapp.decorators import superuser_required

class DecoratedURLPattern(RegexURLPattern):
def resolve(self, *args, **kwargs):
result = super(DecoratedURLPattern, self).resolve(*args, **kwargs)
if result:
result.func = self._decorate_with(result.func)
return result

class DecoratedRegexURLResolver(RegexURLResolver):
def resolve(self, *args, **kwargs):
result = super(DecoratedRegexURLResolver, self).resolve(*args, **kwargs)
if result:
result.func = self._decorate_with(result.func)
return result

def decorated_includes(func, includes, *args, **kwargs):
urlconf_module, app_name, namespace = includes

for item in urlconf_module:
if isinstance(item, RegexURLPattern):
item.__class__ = DecoratedURLPattern
item._decorate_with = func

elif isinstance(item, RegexURLResolver):
item.__class__ = DecoratedRegexURLResolver
item._decorate_with = func

return urlconf_module, app_name, namespace

urlpatterns = patterns('',
# ...
(r'^private/', decorated_includes(login_required, include(private.urls))),
)