node.js中的JSGI和`http.createServer（）`是执行服务器端JavaScript Web应用程序的两种替代方法吗？

Question

I see that we can write a server side web application in JavaScript without framework, by using http.createServer() from https://medium.com/@saurabhkumar_4718/a-simple-nodejs-server-without-express-js-6773122d365f

I also see from https://en.wikipedia.org/wiki/JSGI

JSGI, or JavaScript Gateway Interface, is an interface between web servers and JavaScript-based web applications and frameworks

Are there two methods alternative to each other, both for executing a server side JavaScript web application? Or are they used for different purposes, and can work together?

Why do we need JSGI when we can achieve the same by creating a server by http.createServer() ?

Answer 1

as mentioned in the comment JSGI is old and very low-level interface between a HTTP server and JavaScript-based web applications . I personally have never came cross any node.js code that uses JSGI . you can use http.createServer() to run your http server in nodejs but you then have to take care of a lot of things such as parsing the requests and responses. You also don't need JSGI when using http.createServer()

a better (more practical,modern and high-level) way to run web server on nodejs is to use express or koa .