我可以使用HtmlUnit监听资源加载事件吗? [英] Can i use HtmlUnit to listen for resource loading events?
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问题描述
我正在尝试使用HtmlUnit来检测无法加载到网页上的资源(脚本，图像，样式表等).
I'm trying to use HtmlUnit to detect resources (scripts, images, stylesheets, etc) that fail to load on a webpage.
我尝试过
new WebConnectionWrapper(webClient) {
@Override
public WebResponse getResponse(WebRequest request) throws IOException {
WebResponse response;
response = super.getResponse(request);
System.out.println(response.getStatusCode());
return response;
}
};
无济于事.尽管有HtmlUnit日志记录，它似乎也不能处理CSS，图像或JS:
to no avail. It doesn't seem to handle CSS, images or JS, despite HtmlUnit logging:
statusCode = [404] contentType = [text/html] 文件:/resources/style.css
statusCode=[404] contentType=[text/html] File: /resources/style.css
作为参考，这是我正在加载的文件:
For reference, here's the file I'm loading:
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<script type='text/javascript'>
var xhr = new XMLHttpRequest();
xhr.open("get", "someBadLink", true);
xhr.send();
</script>
<link href="/resources/style.css" rel="stylesheet"/>
</head>
<body>
<img src="bad_image.png">
Cool.
</body>
</html>
是否可以使用HtmlUnit检测所有404的AJAX资源，CSS脚本和图像?
Is there any way to use HtmlUnit to detect the AJAX resource, CSS script and image that all 404?
推荐答案
- 对于AJAX，您必须等待此处.
- HtmlUnit不会自动加载 HtmlLink 和 HtmlImage ，出于性能原因.
- 请在下面的代码段中将其全部打印出来.您可以使用 .getByXPath( )以获取所有元素的列表.
- 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();
}
}
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