Grab JSON from mtgjson.com, parse it and write out simplified json file of just card id and title.

getData.js

/**
 * @file
 * Fetch card data from mtgjson.com, write it in a format
 * that is more easily consumed by our application.
 */
'use strict';

var http = require('http'),
  fs = require('fs');

var fetchData = {

  //Properties
  properties: {
    url: 'http://mtgjson.com/json/AllSets-x.json'
  },

  /**
   * Get the JSON file.
   */
  getJson: function (url) {
    //console.log(url);
    http.get(url, function (res) {
      var str = '';
      console.log('Response: ' + res.statusCode);
      res.on('data', function (chunk) {
        str += chunk;
      });
      res.on('end', function () {
        fetchData.parseJson(str);
      });
    }).on('error', function (e) {
      console.log("Error: " + e.message);
    });
  },

  /**
   * Kick it off.
   */
  init: function () {
    fetchData.getJson(fetchData.properties.url);
  },

  /**
   * Read the JSON response.
   */
  parseJson: function (jsonString) {
    var cards = {},
      card = {},
      set = {},
      cardObj = {},
      jsonObj = JSON.parse(jsonString);

    for (set in jsonObj) {
      if (jsonObj.hasOwnProperty(set)) {
        for (card in jsonObj[set].cards) {
          if (jsonObj[set].cards.hasOwnProperty(card)) {
            cardObj = jsonObj[set].cards[card];
            cards[cardObj.multiverseid] = {};
            cards[cardObj.multiverseid].id = cardObj.multiverseid;
            cards[cardObj.multiverseid].name = cardObj.name;
          }
        }
      }
    }
    fetchData.writeFile(cards);
  },

  /**
   * Write JSON data to file.
   */
  writeFile: function (json) {
    var jsonString = JSON.stringify(json);
    fs.writeFile('./carddata.json', jsonString, function (err) {
      if (err) {
        console.log(err);
      } else {
        console.log('Card Data Saved');
      }
    });
  }
};

fetchData.init();