Abstract a WebSocket adapter interface to support multiple libraries #37
Description
To improve compatibility with different WebSocket libraries, introduce an abstraction layer via a WebSocket adapter interface. Provide a default implementation using golang.org/x/net/websocket and allow custom adapters for libraries such as github.com/coder/websocket and github.com/gorilla/websocket.
Proposed approach:
- Define a unified WebSocketAdapter interface that covers connect/upgrade, read, write, close, and error handling, including binary/text frames and context cancellation.
- Implement the default adapter based on golang.org/x/net/websocket.
- Expose clear extension points so users can implement adapters for other libraries (e.g., coder/websocket, gorilla/websocket).
- Document how to implement and plug in a custom adapter.
This change increases extensibility and decouples go-vncproxy from any specific WebSocket library.