类型错误：%d 格式：需要一个数字，而不是 Dash

Posted 2023-03-22

【中文标题】类型错误：%d 格式：需要一个数字，而不是 Dash

【英文标题】：TypeError: %d format: a number is required, not Dash

【发布时间】：2020-09-24 22:40:14

【问题描述】：

我正在创建一个带有令牌身份验证的烧瓶 Dash 应用程序。如果令牌经过身份验证，那么我想将 dash.Dash() 传递到烧瓶应用程序中，否则想要返回一个虚拟的破折号布局。但是当我点击路线“仪表板”时出现以下错误。请帮我解决这个问题。

错误：

__init.py 
"""
Initialize app
"""
from flask import Flask, make_response, request, redirect, jsonify, url_for, session
import jwt
import urllib.parse
from functools import wraps
from datetime import timedelta

import os
print("__init__.py location", os.getcwd())
path = os.path.join("application", "dash_application")
#os.chdir(path)
print("directory after init", os.getcwd())


def create_app():
    """
    construct the flask core application
    :return: Complete app
    """
    app = Flask(__name__)
    app.config.from_object('config.Config')


    """
    auth_request decorator is validating the token, if token is genuine then it returning to next method else
    sending invalid token response to use
    """

    def auth_request(f):
        @wraps(f)
        def wrapper(*args, **kwargs):
            authorization = request.args.get('access_token') or request.headers.get('authorization')

            if not authorization:
                return make_response(jsonify(
                    "message": "Invalid request",
                    "token": "null",
                    "status": False,
                    "error": 
                        "message": "Invalid token or token missing"
                    
                ), 400)
            try:
                if request.method == "POST":
                    authorization = authorization[7:]  # Removed first Bearer OR bearer from token
                    data = jwt.decode(authorization, app.config.get('SECRET_KEY'), audience=app.config.get('AUDIENCE'))
                    return f(data, *args, **kwargs)

                authorization = urllib.parse.unquote(authorization)  # Removed first Bearer OR bearer from token
                data = jwt.decode(authorization, app.config.get('SECRET_KEY'), audience=app.config.get('AUDIENCE'))
                return f(data, *args, **kwargs)

            except Exception as e:
                print(e)
                return make_response(jsonify(
                    "message": "Invalid request",
                    "token": "null",
                    "status": False,
                    "error": 
                        "message": "Invalid token or token missing"
                    
                ), 400)

        return wrapper

    @app.route('/', methods=['GET'])
    def index():
        return make_response(jsonify(
            "message": "Success",
            "status": True,
            "error": 
        ), 200)

    @app.route('/authenticate', methods=['POST'])
    @auth_request
    def authenticate(data):
        return make_response(jsonify(
            "message": "successfully authenticated!",
            "status": True,
            "error": 
        ), 200)

    @app.route('/twc-admin-panel-integration', methods=['GET'])
    @auth_request
    def twc_admin_panel_integration(data):
        if int(data['corporateId']) > 0:
            session['isAuthenticated'] = 'yes'
            session['corporateId'] = 9 # data.get('corporateId')
            return redirect('/dashboard/')

        return make_response(jsonify(
            "message": "required property is missing in token",
            "status": False,
            "error": 
                "message": "invalid token"
            
        ), 400)

    @app.route('/dashboard/')
    def mypage():
        app = Flask(__name__)
        app.config.from_object('config.Config')
        # session.permanent = True
        # app.permanent_session_lifetime = timedelta(minutes=app.config.get('SESSION_EXPIRY_TIME'))
        # app.secret_key = app.config.get('SESSION_SECRET')
        with app.app_context():
            print("reached at line 109")
            from application.dash_application.dashapp import add_dash
            dashapp = add_dash(app, 179)  # add_dash returning the dash.Dash instance
            #
            # if session.get('isAuthenticated') is not None:
            #     if 'yes' in session['isAuthenticated']:
            return app, dashapp
            #     return redirect(app.config.get('TWC_ADMIN_URL'))
            # return redirect(app.config.get('TWC_ADMIN_URL'))

    with app.app_context():
        from application.dash_application.dashapp import add_dash
        dashapp = add_dash(app, 179)

    return app, dashapp

并使用 WSGI DispatcherMiddleware 运行此应用程序文件

app.py

"""
Application entry point
"""
from application import create_app
from flask_cors import CORS
from werkzeug.middleware.dispatcher import DispatcherMiddleware
from werkzeug.serving import run_simple


def main():
    flask, dash = create_app()
    CORS(flask, resources=r"/*": "origins": "*")
    if dash:
        app = DispatcherMiddleware(flask, 
            'dashboard': dash.server
        )
        run_simple(hostname="127.0.0.1", port=8080, application=app, use_reloader=True, use_debugger=True)

if __name__=="__main__":
    main()

完整的错误回溯是：

[2020-06-05 21:54:43,860] ERROR in app: Exception on /dashboard/ [GET]
Traceback (most recent call last):
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\werkzeug\wrappers\base_response.py", line 298, in status_code
    self._status = "%d %s" % (code, HTTP_STATUS_CODES[code].upper())
KeyError: <dash.dash.Dash object at 0x0000020514B01390>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\flask\app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
    return self.finalize_request(rv)
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\flask\app.py", line 1967, in finalize_request
    response = self.make_response(rv)
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\flask\app.py", line 2138, in make_response
    rv.status_code = status
  File "D:\TWC\DashApp\crazy_corner\lib\site-packages\werkzeug\wrappers\base_response.py", line 300, in status_code
    self._status = "%d UNKNOWN" % code
TypeError: %d format: a number is required, not Dash

【问题讨论】：

请提供完整的错误回溯。

嗨，我添加了回溯错误。

任何查看此内容的人也可能对有关 Dash 和 JWT 的相关对话感兴趣：***.com/q/57629586/320399

【参考方案1】：

我不太明白你想做什么，但在这个视图中函数mypage：

def create_app():
    # ...

    @app.route('/dashboard/')
    def mypage():
        # ...
        with app.app_context():
            # ...
            return app, dashapp

    # ...

当你返回一个包含两个元素的元组时，Flask 会假定它是(body, status_code)，并且 status_code 必须是一个数字。但是在您的情况下，元组的第二个元素是 Dash 对象（dashapp），这会导致错误。此外，您作为元组的第一个元素返回的 Flask 应用程序实例 (app) 不是视图函数的有效响应体。

【讨论】：

现在我遇到了问题。但是如何在仪表板应用程序中集成或更新特定于用户的布局？实际上，我正在为客户端创建一个破折号应用程序，其中布局是根据 clientID 表单请求创建的。

另外，如果我的回答解决了当前的问题，请采纳:)