JavaScript/Node.js Sample

Note: This page is deprecated. For more recent updates, see gtfs.org - JavaScript Language Bindings.

To use the gtfs-realtime-bindings JavaScript Node.js classes in your own project, you need to first install our Node.js npm package:

npm install gtfs-realtime-bindings

These bindings are designed to be used in the Node.js environment, but with some effort, they can probably be used in other JavaScript environments as well.

The following Node.js code snippet demonstrates downloading a GTFS realtime data feed from a particular URL, parsing it as a FeedMessage (the root type of the GTFS realtime schema), and iterating over the results.

var GtfsRealtimeBindings = require('gtfs-realtime-bindings');
var request = require('request');

var requestSettings = {
  method: 'GET',
  url: 'URL OF YOUR GTFS-REALTIME SOURCE GOES HERE',
  encoding: null
};
request(requestSettings, function (error, response, body) {
  if (!error && response.statusCode == 200) {
    var feed = GtfsRealtimeBindings.transit_realtime.FeedMessage.decode(body);
    feed.entity.forEach(function(entity) {
      if (entity.trip_update) {
        console.log(entity.trip_update);
      }
    });
  }
});

For more details, see the JavaScript / Node.js project page.