Function encodePayloadAsBinary

packages/engine.io/lib/parser-v3/index.ts:398–406

(packets, callback)

 */

export function encodePayloadAsBinary (packets, callback) {
  if (!packets.length) {
    return callback(EMPTY_BUFFER);
  }

  map(packets, encodeOneBinaryPacket, function(err, results) {
    return callback(Buffer.concat(results));
  });
};

function encodeOneBinaryPacket(p, doneCallback) {