简单的服务器端Flask会话变量 [英] Simple server-side Flask session variable

问题描述

在Flask中拥有服务器端会话变量的最简单方法是什么?

What is the easiest way to have a server-side session variable in Flask?

变量值:

1. 一个简单的字符串
2. 客户端(浏览器)不可见
3. 不能持久存储到数据库中-会话消失后就消失了

有一个内置的Flask会话，但是它将会话数据发送到客户端:

There is a built-in Flask session, but it sends the session data to the client:

session["secret"] = "I can see you"

数据是Base64编码的，并以加密签名的cookie发送，但是在客户端上读取仍然很简单.

The data is Base64 encoded and sent in a cryptographically signed cookie, but it is still trivial to read on the client.

在许多框架中，创建服务器端会话变量是一种形式，例如:

In many frameworks, creating a server-side session variable is a one-liner, such as:

session.secret = "You can't see this"

到目前为止，我发现的Flask解决方案非常麻烦，并且适合处理大量数据.有一个简单的轻量级解决方案吗?

The Flask solutions I have found so far are pretty cumbersome and geared towards handling large chunks of data. Is there a simple lightweight solution?

推荐答案

我认为 Flask-Session 扩展程序就是您想要的.

I think the Flask-Session extension is what you are looking for.

Flask-Session是Flask的扩展，它为您的应用程序添加了对服务器端会话的支持.

Flask-Session is an extension for Flask that adds support for Server-side Session to your application.

从链接的网站上:

from flask import Flask, session
from flask_session import Session  # new style
# from flask.ext.session import Session  # old style

app = Flask(__name__)
# Check Configuration section for more details
SESSION_TYPE = 'redis'
app.config.from_object(__name__)
Session(app)

@app.route('/set/')
def set():
    session['key'] = 'value'
    return 'ok'

@app.route('/get/')
def get():
    return session.get('key', 'not set')

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