如何解决Flask-Session 刷新后丢失 Flask-Login 会话数据
我目前正在使用 Flask、Flask-Session、Flask-SocketIO 和 Flask-Login 构建一个包含不同房间的聊天应用程序。我在会话中保存用户的当前房间,以便我可以显示基于该房间的信息。我正在从 Flask-SocketIO 事件更新这个会话数据,我只能通过使用 Flask-Session 模块而不是来自 Flask 的内置会话来做到这一点。因此,当我使用 Flask-Login 登录用户时,当前用户的数据将保存在此 Flask-Session 会话中,会话类型为“文件系统”。当我刷新页面时,Flask-Login 数据不再在会话中,这导致我的程序崩溃,因为当前用户现在是 AnonymousUserMixin 对象,因此用户已注销。那么是什么原因导致会话丢失当前用户的数据呢?一起使用 Flask-Session 和 Flask-Login 有问题吗?还是我只是在配置上做错了什么?
这是刷新前后会话的样子:
之前:
<FileSystemSession {'_permanent': True,'csrf_token': 'cd2428d22717128228ea31b9182ac46766802839','current_room': 'Lobby','_fresh': True,'_user_id': '1','_id': '4825ca5a26d88cfc91bcb75ef854505f0d4cdc736affaac2fd3211fb6015b34490c6ec47ec7175dee531442ec8d3a1d5f092c4de1349ca0d48fe723aed678c5a','_flashes': [('success','Logged in successfully')]}>
之后:
<FileSystemSession {'_permanent': True,'current_room': 'Lobby'}>
如您所见,来自 Flask-Login 模块的会话数据消失了,这就是为什么它说没有用户登录的原因。
这是我的代码:
init.py:
from flask import Flask
from flask_session import Session
from flask_login import LoginManager
from .models import *
app = Flask(__name__)
def create_app():
app.config["SECRET_KEY"] = "secret!"
app.config["SESSION_TYPE"] = "filesystem"
app.config["sqlALCHEMY_DATABASE_URI"] = f"sqlite:///{DB_NAME}"
login_manager = LoginManager()
login_manager.init_app(app)
Session(app)
@login_manager.user_loader
def load_user(id):
return User.query.get(int(id))
db.init_app(app)
from .application import socketio
from .views import views
from .auth import auth
app.register_blueprint(views,url_prefix="/")
app.register_blueprint(auth,url_prefix="/")
return socketio,app
auth.py:
from flask import Blueprint,render_template,flash,url_for,redirect,session,current_app
from flask_login import login_user,logout_user,current_user,login_required
from .wtform_fields import RegistrationForm,LoginForm
from werkzeug.security import generate_password_hash,check_password_hash
from .models import *
from app import app
auth = Blueprint("auth",__name__)
@auth.route("/login",methods=["GET","POST"])
def login():
login_form = LoginForm()
if login_form.validate_on_submit():
username = login_form.username.data
password = login_form.password.data
user = User.query.filter_by(username=username).first()
if user:
if check_password_hash(user.password,password):
login_user(user)
flash("Logged in successfully",category="success")
session["current_room"] = "Lobby"
return redirect(url_for("views.chat"))
else:
flash("Password is incorrect",category="error")
else:
flash(f"No user named {username}",category="error")
return render_template("login.html",form=login_form,user=current_user)
views.py:
from flask import Blueprint,request,session
from flask_login import current_user,login_required
from .models import *
views = Blueprint("views",__name__)
@views.route("/chat","POST"])
def chat():
return render_template("chat.html",user=current_user,rooms=current_user.rooms,current_room=Room.query.filter_by(room_name=session["current_room"]).first())
#Crashes after refresh because current user is anonymous
application.py
from flask import session
from flask_socketio import SocketIO,emit,send,join_room,leave_room
from app import app
from flask_login import current_user,logout_user
socketio = SocketIO(app,manage_session=False)
@socketio.on('join')
def on_join(data):
user = data["username"]
room = data["room"]
join_room(room)
session["current_room"] = room #Where I update the session
emit("room-manager",{"message": f"{user} has joined the {room} room"},room=room)
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