Extract the HTML content from a website that is dynamically rendered using JavaScript

Follow this link to access a document in an open nutrition database:

http://www.dabas.com/ProductSheet/Detail.ashx/124494

I am attempting to extract data from this page using xpath. The issue arises when I attempt to view the page source to identify the necessary tags, but all I see is:

<!DOCTYPE html>

<html>
<head>
    <script src="../../js/jquery-1.3.2-vsdoc2.js" type="text/javascript"></script>
    <title>ProductSheetLoader</title>
</head>
<body>
    <div style="position:absolute; left:50%; top:50%; width:500px; height:200px; margin-top:-100px; margin-left:-266px; padding:15px; color:#666;">
        <h1><img src="../../images/ajax-loader.gif" /> Product sheet loading...</h1>
    </div>
    <input id="hiddenARIDENT" name="ARIDENT" type="hidden" value="124494" />
</body>

<script type="text/javascript">
    $(document).ready(function () {
        var url2 = "/ProductSheet/Details.ashx/" + $('#hiddenARIDENT').val()

        $.ajax({
            url: url2,
            cache: false,
            success: function (response) {
                with (window.document) {
                    write(response);
                    close();
                }
            }
        });

    });

</script>

</html>

It appears that the information is being loaded from elsewhere. When I use f12, I can see the desired information, but how can I access it? Is it even possible?

Any assistance would be greatly appreciated.

Answer №1

Upon loading, the original page utilizes AJAX to fetch and replace the current document content with updated information. The essential data can be found at

/ProductSheet/Details.ashx/124494
, showcasing the actual contents of the page with the inclusion of the additional letter s in Details.ashx.

In most cases, the server would typically verify if the request includes the X-Requested-With: XMLHttpRequest header; however, this particular instance does not appear to require it.

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