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DocumentationGrafana k6JavaScript APIk6/wsSocketSocket.sendBinary(data)
Open source

Socket.sendBinary(data)

Note

A module with a better and standard API exists.

The new k6/experimental/websockets API partially implements the WebSockets API living standard.

When possible, we recommend using the new API. It uses a global event loop for consistency with other k6 APIs and better performance.

Send binary data through the connection.

ParameterTypeDescription
dataArrayBufferThe data to send.

Example

JavaScript 
import ws from 'k6/ws';

const binFile = open('./file.pdf', 'b');

export default function () {
  ws.connect('http://wshost/', function (socket) {
    socket.on('open', function () {
      socket.sendBinary(binFile);
    });

    socket.on('binaryMessage', function (msg) {
      // msg is an ArrayBuffer, so we can wrap it in a typed array directly.
      new Uint8Array(msg);
    });
  });
}