Fixed requested changes to RethinkDB handler

var crypto = require('crypto');

var rethink = require('rethinkdbdash');

const crypto = require('crypto');

const rethink = require('rethinkdbdash');

var RethinkDBStore = function (options) {

  this._options = options;

  this._options.silent = true;

  this._options.host = options.host || '127.0.0.1';

  this._options.port = options.port || 28015;

  this._options.db = options.db || 'haste';

  this._options.user = options.user || 'admin';

  this._options.password = options.password || '';

  this.client = rethink(this._options);

var RethinkDBStore = (options) => {

  this.client = rethink({

    silent: true,

    host: options.host || '127.0.0.1',

    port: options.port || 28015,

    db: options.db || 'haste',

    user: options.user || 'admin',

    password: options.password || ''

  });

};

RethinkDBStore.md5 = function (str) {

  var md5sum = crypto.createHash('md5');

RethinkDBStore.md5 = (str) => {

  const md5sum = crypto.createHash('md5');

  md5sum.update(str);

  return md5sum.digest('hex');

};

RethinkDBStore.prototype.set = function (key, data, callback) {

RethinkDBStore.prototype.set = (key, data, callback) => {

  try {

    this.client.table('uploads').insert({ id: RethinkDBStore.md5(key), data: data }).run(function (error) {

    this.client.table('uploads').insert({ id: RethinkDBStore.md5(key), data: data }).run((error) =? {

      if (error) return callback(false);

      callback(true);

    });

  }

};

RethinkDBStore.prototype.get = function (key, callback) {

RethinkDBStore.prototype.get = (key, callback) => {

  this.client.table('uploads').get(RethinkDBStore.md5(key)).run((error, result) => {

    if (error || !result) return callback(false);

    callback(result.data);