:sig
String ws_message()

:params
return value : payload of the current WebSocket message

:see
>websocket

:content
Returns the payload of the current WebSocket message being handled by `WS(Request& context)`.

For text frames this is the decoded text payload. For binary frames this `String` contains the raw message bytes.

Use `ws_is_binary()` or `ws_opcode()` to decide how the payload should be interpreted.

Related:

- PHP: WebSocket connection metadata and send APIs in Ratchet, Workerman, or similar server frameworks
- JavaScript / Node.js: browser `WebSocket` properties and Node `ws` server-side connection inspection and send methods
