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Go Academy · Lesson

WebSocket Basics

Real-time bidirectional comms.

Real-Time, Two-Way Communication

HTTP is request-response: the client asks, the server answers, the connection (logically) ends. For chat, live dashboards, and games you need a persistent, bidirectional channel. That is what WebSockets provide.

The Upgrade Handshake

A WebSocket connection starts as a normal HTTP request with special headers:

  • Upgrade: websocket
  • Connection: Upgrade

The server responds 101 Switching Protocols, and the TCP socket is reused for full-duplex frames.

All lessons in this course

  1. WebSocket Basics
  2. Using gorilla/websocket
  3. Broadcasting Messages
  4. Connection Management
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