处理程序装饰器
由于sanic处理程序是简单的python函数,所以可以以类似于flask的方式将修饰器应用于它们。一个典型的用例是,当您希望在执行处理程序的代码之前运行一些代码时。
授权修饰器
假设您希望检查用户是否有权访问特定端点。您可以创建一个包装处理程序函数的装饰器,检查客户机是否有权访问资源,并发送适当的响应。
from functools import wraps
from sanic.response import json
def authorized():
def decorator(f):
@wraps(f)
async def decorated_function(request, *args, **kwargs):
# run some method that checks the request
# for the client's authorization status
is_authorized = check_request_for_authorization_status(request)
if is_authorized:
# the user is authorized.
# run the handler method and return the response
response = await f(request, *args, **kwargs)
return response
else:
# the user is not authorized.
return json({'status': 'not_authorized'}, 403)
return decorated_function
return decorator
@app.route("/")
@authorized()
async def test(request):
return json({'status': 'authorized'})