Protocols

How would you build a cross-device application? How can devices communicate with each other? Which protocols do you know? How do you choose the right one?

WebSockets and Socket.io

Socket.io is a library for real-time, bidirectional and event-based communication. Under the hood it uses WebSockets, but is a bit easier to use and provides additional functionality on top. You can work through the Socket.io tutorial or work with me one one the examples based on socket.io

Resources

HTTP

• MDN HTTP Overview
• Long polling

Websocket

• WebSockets for beginners
• WebSockets on MDN

WebRTC

• WebRTC Introduction
• Signalling

Server-sent events

• Server-sent events introduction
• WebSocket vs. server-sent events