var FAKE_API_KEY = 'wadus';

var FAKE_PURGE_URL = 'http://example.com/image.jpg';
var FAKE_SERVICE_ID = 'wadus_service_id';
var FAKE_SURROGATE_KEY = 'wadus_key';

var fastlyPurge = new FastlyPurge(FAKE_API_KEY);
var fastlySoftPurge = new FastlyPurge(FAKE_API_KEY, { softPurge: true });

function callback(err, result) {
    console.log(err, result);
}

fastlyPurge.url(FAKE_PURGE_URL, callback);
// or
fastlySoftPurge.url(FAKE_PURGE_URL, { softPurge: false }, callback);

fastlyPurge.service(FAKE_SERVICE_ID, callback);

fastlyPurge.key(FAKE_SERVICE_ID, FAKE_SURROGATE_KEY, callback);
// or
fastlySoftPurge.key(FAKE_SERVICE_ID, FAKE_SURROGATE_KEY, { softPurge: false }, callback);

fastlyPurge.url(FAKE_PURGE_URL, { softPurge: true }, callback);
// or
fastlySoftPurge.url(FAKE_PURGE_URL, callback);

fastlyPurge.key(FAKE_SERVICE_ID, FAKE_SURROGATE_KEY, { softPurge: true }, callback);
// or
fastlySoftPurge.key(FAKE_SERVICE_ID, FAKE_SURROGATE_KEY, callback);