heroku-client

heroku-client

A wrapper around the v3 Heroku API.

Install

$ npm install heroku-client --save

Usage

heroku-client works by providing functions that return proxy objects for interacting with different resources through the Heroku API.

To begin, require the Heroku module and create a client, passing in an API token:

var Heroku = require('heroku-client'),
    heroku = new Heroku({ token: process.env.HEROKU_API_TOKEN });

The simplest example is listing a user's apps. First, we call heroku.apps(), which returns a proxy object to the /apps endpoint, then we call list() to actually perform the API call:

heroku.apps().list(function (err, apps) {
  // `apps` is a parsed JSON response from the API
});

The advantage of using proxy objects is that they are reusable. Let's get the info for the user's app "my-app", get the dynos for the app, and remove a collaborator:

var app = heroku.apps('my-app');

app.info(function (err, app) {
  // Details about the `app`
});

app.dynos().list(function (err, dynos) {
  // List of the app's `dynos`
});

app.collaborators('[e-mail]').delete(function (err, collaborator) {
  // The `collaborator` has been removed unless `err`
});

Requests that require a body are easy, as well. Let's add a collaborator to the user's app "another-app":

var app  = heroku.apps('another-app'),
    user = { email: '[e-mail]' };

app.collaborators().create({ user: user }, function (err, collaborator) {
  // `collaborator` is the newly added collaborator unless `err`
});

Promises

heroku-client works with Node-style callbacks, but also implements promises with the Q library.

var q = require('q');

// Fetches dynos for all of my apps.
heroku.apps().list().then(function (apps) {

  return q.all(apps.map(function (app) {
    return heroku.apps(app.name).dynos().list();
  }));

}).then(function (dynos) {

  console.log(dynos);

});

Caching

When NODE_ENV is set to "production", heroku-client will create a memcached client using memjs. See the memjs repo for configuration instructions.

For local development with caching, it's enough to start a memcached server and set MEMCACHIER_SERVERS to 0.0.0.0:11211 in your .env file.

You will also need to pass an option called cacheKeyPostfix when creating your heroku-client client:

var heroku = new Heroku({ token: user.apiToken, cacheKeyPostfix: user.id });

This ensures that API responses are cached and properly scoped to the user that heroku-client is making requests on behalf of.

Contributing

Updating resources

When a new resource manifest is available, download it into the repo, run tests, generate documentation, and bump the version number accordingly.

Generating documentation

Documentation for node-heroku is auto-generated from the resources manifest. Docs are generated like so:

$ bin/docs

Generating docs also runs a cursory test, ensuring that every documented function is a function that can be called.

Running tests

node-heroku uses jasmine-node for tests:

$ npm test