--- title: "mg_send_websocket_handshake2()" decl_name: "mg_send_websocket_handshake2" symbol_kind: "func" signature: | void mg_send_websocket_handshake2(struct mg_connection *nc, const char *path, const char *host, const char *protocol, const char *extra_headers); --- Send WebSocket handshake to the server. `nc` must be a valid connection, connected to a server. `uri` is an URI to fetch, `host` goes into the `Host` header, `protocol` goes into the `Sec-WebSocket-Proto` header (NULL to omit), `extra_headers` is an extra HTTP header to send or `NULL`. This function is intended to be used by the WebSocket client.