some samples abount server push tech e.g. Polling, COMET, SSE, WebSocket

Firstly,

cd server

npm i 

npm start

Then visit http://127.0.0.1:8080/ & http://127.0.0.1:8080/post in your browser

• On http://127.0.0.1:8080/post you can post some messages.
• Then on http://127.0.0.1:8080/ you will recieve these messages posted just now.

😊 😊

These technologies include:

• Ajax Polling
• COMET
  • HTTP long polling
  • iframe
• SSE (Server-Sent Events)
• WebSocket

And this is a brief introduction of these server-side-push technologies (in Chinese).