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

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

// encode-buffer.js

exports.EncodeBuffer = EncodeBuffer;

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

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

FlexEncoder.mixin(EncodeBuffer.prototype);

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

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

EncodeBuffer.prototype.codec = preset;

EncodeBuffer.prototype.write = function(input) {
  this.codec.encode(this, input);
};