运行 Flask 时的警告消息 [英] Warning message while running Flask

问题描述

当我从命令行运行 Flask 代码时，出现警告:

While I am running Flask code from my command line, a warning is appearing:

Serving Flask app "hello_flask" (lazy loading)
* Environment: production
  WARNING: Do not use the development server in a production environment.
  Use a production WSGI server instead.

这是什么意思?

推荐答案

如 Flask 中所述文档:

虽然轻量级且易于使用，但 Flask 的内置服务器不适合生产，因为它不能很好地扩展并且默认一次只处理一个请求.

While lightweight and easy to use, Flask’s built-in server is not suitable for production as it doesn’t scale well and by default serves only one request at a time.

鉴于 Web 应用程序需要处理来自多个用户的多个并发请求，Flask 警告您开发服务器不会这样做(默认情况下).它建议使用 Web 服务器网关接口 (WSGI) 服务器 (部署文档中列出了许多可能性，每个可能性都有进一步的说明)，它们将用作您的 Web/应用程序服务器并调用 Flask因为它服务于请求.

Given that a web application is expected to handle multiple concurrent requests from multiple users, Flask is warning you that the development server will not do this (by default). It recommends using a Web Server Gateway Interface (WSGI) server (numerous possibilities are listed in the deployment docs with further instructions for each) that will function as your web/application server and call Flask as it serves requests.

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