Flask_Session插件

pip install Flask-Session

from flask import Flask, request, render_template, redirect, session
from flask_session import Session
import redis

app = Flask(__name__)
# app.secret_key = "123"
app.config["SESSION_TYPE"] = "redis"
app.config["SESSION_REDIS"] = redis.Redis(host="localhost", port=6379, db=3)
Session(app)

@app.route("/login", methods=("GET", "POST"))
def login():
    msg = ""
    if request.method == "POST":
        print(request.form)
        print(request.form.get("hhh"))
        username = request.form.get("username")
        pwd = request.form.get("pwd")
        if username == "ggg" and pwd == "123":
            session["user"] = username
            return redirect("/home")
        msg = "用户名或者密码错误"
    return render_template("login.html", msg=msg)

    def _get_interface(self, app):
        config = app.config.copy()
        config.setdefault(‘SESSION_TYPE‘, ‘null‘)
        config.setdefault(‘SESSION_PERMANENT‘, True)
        config.setdefault(‘SESSION_USE_SIGNER‘, False)
        config.setdefault(‘SESSION_KEY_PREFIX‘, ‘session:‘)
        config.setdefault(‘SESSION_REDIS‘, None)
        config.setdefault(‘SESSION_MEMCACHED‘, None)
        config.setdefault(‘SESSION_FILE_DIR‘,
                          os.path.join(os.getcwd(), ‘flask_session‘))
        config.setdefault(‘SESSION_FILE_THRESHOLD‘, 500)
        config.setdefault(‘SESSION_FILE_MODE‘, 384)
        config.setdefault(‘SESSION_MONGODB‘, None)
        config.setdefault(‘SESSION_MONGODB_DB‘, ‘flask_session‘)
        config.setdefault(‘SESSION_MONGODB_COLLECT‘, ‘sessions‘)
        config.setdefault(‘SESSION_SQLALCHEMY‘, None)
        config.setdefault(‘SESSION_SQLALCHEMY_TABLE‘, ‘sessions‘)

        if config[‘SESSION_TYPE‘] == ‘redis‘:
            session_interface = RedisSessionInterface(
                config[‘SESSION_REDIS‘], config[‘SESSION_KEY_PREFIX‘],
                config[‘SESSION_USE_SIGNER‘], config[‘SESSION_PERMANENT‘])
        .......

class RedisSessionInterface(SessionInterface):
    def __init__(self, redis, key_prefix, use_signer=False, permanent=True):...
        ...

    def open_session(self, app, request): ...

    def save_session(self, app, session, response):...


# 通过重写这两个方法，实现