JavaScript GTFS-realtime Language Bindings

Provides JavaScript classes generated from the
GTFS-realtime Protocol
Buffer specification. These classes will allow you to parse a binary Protocol
Buffer GTFS-realtime data feed into JavaScript objects.

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.

We use the ProtBuf.js library for
JavaScript Protocol Buffer support.

Add the Dependency

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

``
npm install gtfs-realtime-bindings
`

Example Code

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.

`javascript
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.FeedMessage.decode(body);
feed.entity.forEach(function(entity) {
if (entity.trip_update) {
console.log(entity.trip_update);
}
});
}
});
`

For more details on the naming conventions for the Javascript classes generated
from the
gtfs-realtime.proto,
check out the ProtoBuf.js project
which we use to handle our Protocol Buffer serialization.

Updating

Note that, to maintain compatability with CommonJS typescript projects, we need to manually change the Long` type to the stub type included in the ProtobufJS library.