function Search() {
    var self = this;
    //many different items set

    self.totalSize = ko.observable(total);
    self.uploadedSize = ko.observable(uploaded);
}

var uploadProgress;

var total = 100;
var uploaded = 0;

function runUploadProgress() {
    uploadProgress = setInterval(function () {
        callWebApi({
            api: webapi.getUploadProgress,
            data: null,
            cache: false,
            success: function (json) {
                total = json.TotalBytes;
                uploaded = json.TransferedBytes;
                console.log(total + " - " + uploaded);
            }
        });
        if (total == uploaded) {
            stopUploadProgress();
        }
    }, 1000);
    return true;
}

function stopUploadProgress() {
    clearInterval(uploadProgress);
}