How do you develop REST API?

When developing REST API in Go, I adhere to the following principles:

• Clearly define the structure of resources and their endpoints using understandable URLs.
• Use standard HTTP methods (GET, POST, PUT, DELETE) according to their semantics.
• Serialize data using JSON with the standard encoding/json library.
• Handle errors with clear HTTP statuses and messages.
• Structure code using middleware for logging, authentication, and validation.
• Write tests for each endpoint.

Example of a simple handler:

func getUserHandler(w http.ResponseWriter, r *http.Request) {
    id := mux.Vars(r)["id"]
    user, err := getUserByID(id)
    if err != nil {
        http.Error(w, "User not found", http.StatusNotFound)
        return
    }
    w.Header().Set("Content-Type", "application/json")
    json.NewEncoder(w).Encode(user)
}