:sig
u8 ws_opcode()

:params
return value : opcode of the current WebSocket message

:see
>websocket

:content
Returns the opcode of the message currently being handled by `WS(Request& context)`.

Common values are:

- `0x1` for text messages
- `0x2` for binary messages

:example
// ws_opcode() returns the WebSocket frame opcode (1 text, 2 binary, 8 close, ...).
print("opcode: ", (u64)ws_opcode(), " (0 outside a WS frame)\n");