Question 1

How to handle CORS properly with gorilla/mux?

Accepted Answer

Use the built-in CORSMethodMiddleware to set method headers, but you must add a custom handler for other CORS headers like Access-Control-Allow-Origin. The README provides an example combining both for full CORS support.

Question 2

gorilla/mux vs Gin router: which is better for APIs?

Accepted Answer

Gorilla/mux is a minimal router that stays close to Go's net/http, ideal for custom setups. Gin is a full framework with built-in JSON binding and performance optimizations, better for rapid API development but less flexible if you prefer standard library compatibility.

Question 3

How to serve a React app with gorilla/mux?

Accepted Answer

Implement a spaHandler that serves static files from a directory and falls back to index.html for client-side routing. The README includes a complete example for SPAs like those built with React Router's BrowserRouter.

Question 4

Best practices for adding authentication middleware in gorilla/mux?

Accepted Answer

Define a middleware function that checks tokens or sessions and use Router.Use() to apply it globally. The README shows an authentication middleware example that maps session tokens to users and aborts requests if unauthorized.

Question 5

How to test handlers with route variables in gorilla/mux?

Accepted Answer

Use httptest.NewRecorder and pass the request through the router in tests. The README demonstrates table-driven tests for routes with variables, ensuring proper parameter extraction and error handling.

Question 6

Can gorilla/mux handle WebSocket upgrades?

Accepted Answer

Yes, but it requires manual handling: use route matchers to detect WebSocket upgrade requests based on paths or headers, then delegate to a separate handler for the WebSocket connection, as gorilla/mux focuses on HTTP routing.

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