Function mapBinary

client-dist/socket.io.js:419–439

(data, binaryType)

  };

  var mapBinary = function mapBinary(data, binaryType) {
    switch (binaryType) {
      case "blob":
        if (data instanceof Blob) {
          // from WebSocket + binaryType "blob"
          return data;
        } else {
          // from HTTP long-polling or WebTransport
          return new Blob([data]);
        }
      case "arraybuffer":
      default:
        if (data instanceof ArrayBuffer) {
          // from HTTP long-polling (base64) or WebSocket + binaryType "arraybuffer"
          return data;
        } else {
          // from WebTransport (Uint8Array)
          return data.buffer;
        }
    }
  };

  var SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
  var encodePayload = function encodePayload(packets, callback) {