Real-Time WebSocket Systems: Beyond the Tutorial

Part 1: The Problem Space Why HTTP isn't enough for real-time WebSocket lifecycle deep-dive Common misconceptions addressed Part 2: Production-Grade PoC A full-featured real-time system with: ✅ Connection management & heartbeats ✅ Message routing & acknowledgment ✅ Room-based pub/sub pattern ✅ Graceful reconnection strategies ✅ Rate limiting & abuse prevention ✅ Structured logging & metrics Part 3: The Hard Stuff (What Tutorials Skip) Memory leak prevention patterns Horizontal scaling strategies (Redis适配) Debugging & observability Security hardening (WSS, validation, sanitization) Part 4: Code Deep-Dive Modular architecture (not one giant file!) Type-safe implementations Error handling that actually helps