import os

from flask import Flask, session, request

from flask_session import Session

from redis import Redis

app = Flask(__name__)

app.config['SESSION_TYPE'] = 'redis'   #session存储格式为redis

app.config['SESSION_REDIS'] = Redis(    #redis的服务器参数

    host='192.168.1.3',                 #服务器地址

    port=6379)                           #服务器端口

app.config['SESSION_USE_SIGNER'] = True   #是否强制加盐，混淆session

app.config['SECRET_KEY'] = os.urandom(24)  #如果加盐，那么必须设置的安全码，盐

app.config['SESSION_PERMANENT'] = False  #sessons是否长期有效，false，则关闭浏览器，session失效

app.config['PERMANENT_SESSION_LIFETIME'] = 3600   #session长期有效，则设定session生命周期，整数秒，默认大概不到3小时。

Session(app)

@app.route('/')

def default():

    return session.get('key', 'not set')

@app.route('/test/')

def test():

    session['key'] = 'test'

    return 'ok'

@app.route('/set/')

def set():

    arg = request.args.get('key')

    print(arg)

    session['key'] = arg

    return 'ok'

@app.route('/get/')

def get():

    return session.get('key', 'not set')

@app.route('/pop/')

def pop():

    session.pop('key')

    return session.get('key', 'not set')

@app.route('/clear/')

def clear():

    session.clear()

    return session.get('key', 'not set')

if __name__ == "__main__":

    app.run(debug=True)