# coding:utf-8from flask import Flask, make_response, requestapp = Flask(__name__)@app.route("/set_cookie")
def set_cookie():# 创建一个响应的对象resp = make_response('设置成功')# 设置cookieresp.set_cookie('username1', 'hannibal')# 设置多个cookieresp.set_cookie('username2', 'circle')# 默认的有效期是关闭浏览器之前 max_age 是手动添加有效期 单位是妙resp.set_cookie('username3', 'benjamin', max_age=3600)return resp@app.route("/get_cookie")
def get_cookie():c = request.cookies.get('username1')return c@app.route('/del_cookie')
def del_cookie():　　# 删除Cookie的时候也需要先创建响应对象resp = make_response('del cookie')resp.delete_cookie('username3')return respif __name__ == '__main__':app.run(host='0.0.0.0', debug=True)

resp.headers["Set-Cookie"] = "username3=benjamin; Expires=Tue, 23-Jul-2019 09:49:51 GMT; Max-Age=3600; Path=/"

>>> import os
>>> os.urandom(24)
'u\x8a\r\x9b\x89\xad7//\xd6\x9a\x19\t\xdb3A\x92\xbaCN\xee\xc8x-'

# coding:utf-8
from flask import Flask, session, redirect, url_for, escape, request
import sysreload(sys)
sys.setdefaultencoding('utf8')app = Flask(__name__)
# 设置密钥 这个是必须要有的否则会抛出一个RuntimeError
app.config['SECRET_KEY'] = 'u\x8a\r\x9b\x89\xad7//\xd6\x9a\x19\t\xdb3A\x92\xbaCN\xee\xc8x-'@app.route('/')
def index():if 'username' in session:print(session['username'])return '欢迎 %s 登陆' % escape(session['username'])return '抱歉你还没有登陆'@app.route('/login', methods=['GET', 'POST'])
def login():if request.method == 'POST':session['username'] = request.form['username']# 重定向到index页面return redirect(url_for('index'))return '''<form action="" method="post"><p><input type=text name=username><p><input type=submit value=Login></form>'''@app.route('/logout')
def logout():# 如果有就将它删除session.pop('username', None)return redirect(url_for('index'))if __name__ == '__main__':app.run(host='0.0.0.0', debug=True)