extern int afb_ws_text(struct afb_ws *ws, const char *text, size_t length);
extern int afb_ws_texts(struct afb_ws *ws, ...);
extern int afb_ws_binary(struct afb_ws *ws, const void *data, size_t length);
extern int afb_ws_text(struct afb_ws *ws, const char *text, size_t length);
extern int afb_ws_texts(struct afb_ws *ws, ...);
extern int afb_ws_binary(struct afb_ws *ws, const void *data, size_t length);