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What are the differences between technologies like Flask, Django, NodeJS, and Apache? With Apache and NodeJS, they can function as a web server, interfacing your server-side code with HTTP requests. Do Flask and Django also provide this capability or do they provide different functionality?
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Apache/nginx are web servers, they can serve both static content(html,jpg, etc), and dynamic content generated by web apps.
Django/Flask/Express on NodeJS are web frameworks, they provide the common functionality for writing a web application, like request routing/ORM/session/template. It makes writing a web app much easier - you only need to 'fill in the blanks'.
Most of the time, a web app (implemented in a web framework) sits behind a web server, and process requests handed over by the web server. But sometimes, the framework itself can function as a web server, like Tornado/Express.
NodeJS is neither a web framework or a web server. You can think of it as a Javascript cross-platform runtime environment.
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