Flask——session

from flask import Flask,render_template,request,session,redirect

app = Flask(__name__)
# 设置secret_key
app.secret_key = "123456"
app.debug = True
# app.config["DEBUG"] = True

@app.route('/login',methods=["POST","GET"])
def login():
    if request.method == "GET":
        return render_template("login.html")

    if request.method == "POST":
        username = request.form.get("username")
        password = request.form.get("password")
        if username == "henry" and password == "123456":
            # 登录成功设置session
            session["username"] = username
            return redirect('index')
        else:
            return "404"

@app.route('/index')
def index():
    # 检查是否是登录用户
    if session.get("username"):
        return "这是index页面"
    else:
        return redirect('login')
if __name__ == '__main__':
    app.run("0.0.0.0", 9876)

cookies 中 session 存储的是通过 secret_key 加密后的 key , 通过这个 key 从flask程序的内存中找到用户对应的session信息