kindox

I want to implement a Delphi WebSocket server to send binary data (Stream and byte array) to javascript client. This could be done after receive a client message OR EVEN as unidirectional message so no client message need to be received. Below the pseudocode. var WSServer: TWSocketServer; Case A: I want to send back the binary data after receive a message WSServer.OnClientConnect := procedure (Sender: TObject; Client: TWSocketClient; Error: Word) begin TWebSockSrvClient(Client).OnWebSocketMessage := WebSocketMessage; end; procedure WebSocketMessage(Sender: TObject; Msg: string); var MemStream: TMemoryStream; SocketConn: IWebSocketConnection; begin //create and populate MemStream if (Msg = 'A') then begin SocketConn := TWebSocketSocket(Sender).getConnection; //I need to send back the MemStream but I found only these method: //SocketConn.sendString //SocketConn.sendFrame //SocketConn.sendMessage end; end; Case B: send binary data to some client from button click procedure TForm1.btnSendBufferClick(Sender: TObject); var ArrB: TBytes; begin ArrB := [1, 2, 3]; //I tried WSServer.Client[0].SendTB(ArrB) but is doesn't work end; I check OverbyteIcsWebSocketSrv.dpr demo but only strings are send. Any advice?

Thanks @Angus Robertson I need to send a very big buffer (1 GB) of float array so I didn't want to waste time and memory duplicating the data. In addition, if it's only possible to send strings I need to waste time and memory in Javascript converting the data when it arrives because buffer is not created as ArrayBuffer or Blob but string. I thought this library was able to send binary frames (opcode = 0x02) but according to your answer it doesn't. Anyway I appreciate your reply. Do you know any free websocket library to do this?