let dlf = $('.download_form');
let results = [];

dlf.submit(function(e) {
    $.post($(this).attr('action'), $(this).serialize(), function(json) {
        results.push(json["DownloadUrl"]);

        console.log("Processing link " + results.length + "/" + dlf.size() + "...");

        if (results.length >= dlf.size())
            console.log(JSON.stringify(results));

    }, 'json');
    e.preventDefault();
    e.stopPropagation();
    return false;
});

dlf.submit();