python - 如何将参数传递给 after_request？

Question

我是 Flask 的新手，正在学习 @app.after_request 和 @app.teardown_appcontext。我有一个 decorated view对于接受参数的 oauthlib，data(这是一个对象)。

@app.route('/api/me')
@oauth.require_oauth()
def me(data):
    user = data.user
    return jsonify(username=user.username)

执行此 View (以及许多其他 View )后，我想更新我的数据库，但需要访问变量 data。我如何使用 @app.after_request 或 @app.teardown_appcontext 做到这一点？

@app.after_request
def record_ip(response):
   client = data.client # needs access to "data"
   .... log stuff in my database ...
   return response

Answer 1

您可以将对象添加到 flask.g globals object :

from flask import g

@app.route('/api/me')
@oauth.require_oauth()
def me(req):
    user = req.user
    g.oauth_request = req
    return jsonify(username=user.username)

@app.after_request
def record_ip(response):
   req = g.get('oauth_request')
   if req is not None:
       client = req.client # needs access to "req"
       # .... log stuff in my database ...

   return response

全局flask.g 上下文是线程安全的并且绑定(bind)到当前请求；引用自 documentation :

The application context is created and destroyed as necessary. It never moves between threads and it will not be shared between requests.