What is a Web Server Router? (HTTP Server)

About

A router is the routing system of web server that maps an HTTP request:

• based:
  • on the request method
  • and path specified in the URL of the request
• to a chain of request handler (function/method) that will:
  • process the request sequentially
  • and ultimately create the response

Router vs Proxy

Note that the proxy will also re-route the request but to another server and not to a function.