Can I Use Htmlunit To Listen For Resource Loading Events?

I'm trying to use HtmlUnit to detect resources (scripts, images, stylesheets, etc) that fail to load on a webpage. I've tried new WebConnectionWrapper(webClient) { @Override

Solution 1:

• For AJAX, you have to wait as hinted here.
• HtmlUnit doesn't automatically loads HtmlLink and HtmlImage, for performance reasons.
• Please find below snippet that will print all. You can use .getByXPath() to get list of all elements.

public static void main(String[] args) throws Exception {
    try (final WebClient webClient = new WebClient()) {

        new WebConnectionWrapper(webClient) {
            @Override
            public WebResponse getResponse(WebRequest request) throws IOException {
              WebResponse response = super.getResponse(request);
              System.out.println(request.getUrl());
              System.out.println(response.getStatusCode());
              return response;
            }
        };

        String url = "http://localhost/test.html";
        HtmlPage page = webClient.getPage(url);

        // to wait for AJAX
        webClient.waitForBackgroundJavaScript(3000);

        // to forcibly load the link
        HtmlLink link = page.getFirstByXPath("//link");
        link.getWebResponse(true);

        // to forcibly load the image
        HtmlImage image = page.getFirstByXPath("//img");
        image.getImageReader();
    }
}