rocket.chat.mqtt/node_modules/msgpack-lite/lib/decode-buffer.js

It's a MQTT Server, using redis to scale horizontally.

// decode-buffer.js

exports.DecodeBuffer = DecodeBuffer;

var preset = require("./read-core").preset;

var FlexDecoder = require("./flex-buffer").FlexDecoder;

FlexDecoder.mixin(DecodeBuffer.prototype);

function DecodeBuffer(options) {
  if (!(this instanceof DecodeBuffer)) return new DecodeBuffer(options);

  if (options) {
    this.options = options;
    if (options.codec) {
      var codec = this.codec = options.codec;
      if (codec.bufferish) this.bufferish = codec.bufferish;
    }
  }
}

DecodeBuffer.prototype.codec = preset;

DecodeBuffer.prototype.fetch = function() {
  return this.codec.decode(this);
};