🌵例如实现一个 decorator 用来鉴权，支持如下使用方式:
python
# 默认 admin 才能访问（根据实现逻辑，也可以设置为只要登录就可以访问）
@auth_required
# 制定角色可以访问
@auth_required(roles=['admin', 'user'])实现方案参考如下：
方案一：
python
import functools
def auth_required(*args, **kwargs):
if len(args) == 1 and len(kwargs) == 0 and callable(args[0]):
func = args[0]
@functools.wraps(func)
def wrap(*args, **kwargs):
# check auth
if kwargs['role'] != 'admin':
return None
return func(*args, **kwargs)
return wrap
else:
authRoles = kwargs['roles']
def decorator(func):
@functools.wraps(func)
def wrap(*args, **kwargs):
# check auth
if kwargs['role'] not in authRoles:
return None
return func(*args, **kwargs)
return wrap
return decorator
@auth_required
def f1(app, **kwargs):
print(app)
@auth_required(roles=['admin'])
def f2(app, **kwargs):
print(app)
f1('myapp', role='admin')
f2('myapp', role='admin')方案二：
python
import functools
def auth_required(func=None, roles=None):
if func is None:
return functools.partial(auth_required, roles=roles)
@functools.wraps(func)
def wrap(*args, **kwargs):
# check auth
if roles is None:
if kwargs['role'] != 'admin':
return None
else:
if kwargs['role'] not in roles:
return None
return func(*args, **kwargs)
return wrap
@auth_required
def f1(app, **kwargs):
print(app)
@auth_required(roles=['admin'])
def f2(app, **kwargs):
print(app)
f1('myapp', role='admin')
f2('myapp', role='admin')