Promise progress notification using Angular's $q

promise-notification.js

function getResource(url) {
    var resource = [];
    var def = $q.defer();
    var lastProgress = 0;
    server.openAndGet(url, function(chunk) {
        resource.push(chunk);
    });
    while(!server.txDone()) {
        if (server.getProgress() !== lastProgress) {
            lastProgress = server.getProgress();
            def.notify(lastProgress);
        }
    }
    if (server.txDone()) {
        def.resolve(resource);
    }
    if (server.txError()) {
        def.reject(server.getTxError());
    }
    return def.promise;
}

getResource(myUrl)
.then(resolveHandler)
.catch(errorHandler)
.finally(finallyHandler, notifyHandler);

// There is another syntax for this that only uses .then()
getResource(myUrl).then(
    resolveHandler,
    errorHandler,
    notifyHandler
);