!include once #1015699 // websocket

sclass PrintingWebSocketClient extends WebSocketClient {
  *(URI uri) { super(uri); }
  *(URI uri, SS httpHeaders) { super(uri, httpHeaders); }
  
  public void onMessage(S s) {
    print("WebSocket received: " + s);
  }

  public void onOpen(ServerHandshake handshake) {
    print("WebSocket opened");
  }
  
  public void onClose(int code, S reason, bool remote) {
    print("WebSocket closed, code " + code + ", reason: " + reason + ", remote: " + remote);
  }
  
  public void onError(Exception e) { printStackTrace(e); }
}

Began life as a copy of #1032381