websockets

原文涵盖的主题

• WebSockets
• Quick Start
• When to Use
• Best Practices
• Protocol Design
• Connection Lifecycle
• Backpressure & Flow
• Scaling

Building real-time, bidirectional communication with WebSockets. Live updates (chat, notifications, dashboards) Collaborative editing and presence Streaming data and progress Bidirectional client-server interactions Define message envelopes with a type + payload Version the message protocol Use JSON or a binary format consistently Include correlation/request IDs Handle open, message, close, and error events Implement ping/pong keepalive Detect half-open connections Clean up resources on close Respect slow consumers; don't buffer unbounded Use queues with limits and drop policies Batch high-frequency updates Pause/close on saturation Share state via pub/sub (Redis) across nodes Use sticky sessions or a gateway Reconnect with exponential backoff client-side Handle authentication at handshake 1. Define the message envelope and event types. 2. Set up the server with connection handling. 3. Add keepalive (ping/pong) and reconnection. 4. Implement broadcast and room/scope routing. 5. Add backpressure handling for slow clients. 6. Auth at the handshake (token/cookie). 7. Scale with a pub/sub backbone for multi-node. 8. Monitor connections, messages, and errors. 1. Messages round-trip bidi

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