errorCodes.js

var requestLib = require("request"),
  request = requestLib.defaults({
  json:true
}, function(uri, options, callback){
  var params = requestLib.initParams(uri, options, callback);
  return requestLib(params.uri, params.options, function(err, res, body){
    // treat bad status codes as errors
    if (!err && res.statusCode >= 400) {
      params.callback.apply(this, [res.statusCode, res, body]);
    } else {
      params.callback.apply(this, arguments);
    }
  })
});
// note: waiting on https://github.com/mikeal/request/pull/727 for this to work with PUT and POST

note: waiting on request/request#727 for this to work with PUT and POST