我必须设计一个提供Flask服务和Dash服务的Web应用程序。例如,我想在Flask中创建一个登录,并结合Dash应用程序。问题是我无法用破折号绑定烧瓶登录。我需要一个像'@require_login'这样的方法来过滤对Dash服务的访问。代码如下:
app_flask = Flask(__name__)
app_flask.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////login.db'
app_flask.config['SECRET_KEY'] = 'thisissecret'
db = SQLAlchemy(app_flask)
login_manager = LoginManager()
login_manager.init_app(app_flask)
class User(UserMixin, db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(30), unique=True)
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
@app_flask.route('/')
def index():
user = User.query.filter_by(username='admin').first()
login_user(user)
return 'You are now logged in!'
@app_flask.route('/logout')
@login_required
def logout():
logout_user()
return 'You are now logged out!'
@app_flask.route('/home')
@login_required
def home():
return 'The current FLASK user is ' + current_user.username
# TODO how to add login_required for dash?
app_dash = Dash(server=app_flask, url_base_pathname='/dash/')
app_dash.layout = html.H1('MY DASH APP')
if __name__ == '__main__':
app_dash.run_server(debug=True)
这条线,app_dash = Dash(server=app_flask, url_base_pathname='/dash/')
,在其view_functions
识别的app_flask
中创造了新的url_base_pathname
。
您可以在创建app_flask.view_functions
之前和之后调试和检查app_dash
的值。
现在我们知道哪个view_functions
是由app_dash
创建的,我们可以手动应用login_required
。
for view_func in app_flask.view_functions:
if view_func.startswith(app_dash.url_base_pathname):
app_flask.view_functions[view_func] = login_required(app_flask.view_functions[view_func])
The `app_dash` endpoints will now be protected.
解决方案:烧瓶会话(使用cookie)
from flask import session
这是一个例子:
@login_manager.user_loader
def load_user(user_id):
# I think here it's good
session["uid"] = user_id
return User.query.get(int(user_id))
# TODO how to add login_required for dash?
if "uid" in session :
app_dash = Dash(server=app_flask, url_base_pathname='/dash/')
app_dash.layout = html.H1('MY DASH APP')