WebSocket Middleware — Complete Guide to Intercepting Messages

In this tutorial, you will learn about Websocket Middleware. We cover key concepts, practical examples, and best practices to help you master this topic.

WebSocket middleware intercepts incoming and outgoing messages for logging, validation, transformation, Rate Limiting, and authentication in a composable pipeline similar to HTTP middleware.

What You'll Learn

• Building a middleware pipeline for WebSocket
• Common middleware: auth, rate limiting, logging
• Error handling in middleware chains

Why It Matters

Without middleware, cross-cutting concerns like authentication and logging are mixed with business logic. Middleware provides clean separation and reusability.

Real-World Use

Durga Antivirus Pro WebSocket server uses a middleware pipeline: authenticate (validate JWT), rate limit (check message frequency), log (record message metadata), then route to business handler.

What's Next

Learn about WebSocket authentication for auth middleware, or explore WebSocket rate limiting for throttling middleware.