image.js

var uuid = require('node-uuid'),
    redis = require('redis'),
    client = redis.createClient();

exports.create = function(data, callback) {
  var key = uuid.v1.slice(0, 8);
  return client.setnx(key, callback);
};

exports.load = function(id, callback) {
  return client.get(id, function(error, response) {
    if (response == null) {
      console.log(id + " not found");
      client.get('default', callback);
    } else {
      callback(error, response);
    }
  });
};