I want to try an establish if a website is using a CDN. It's a little wooly but I just want to check if the sourcecode contains 'cdn', based on that I can assume the site is using one. - Terrible I know. Unsure of any other menthod.
This is what I have
$url = $_GET['url'];
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
$subject = curl_exec($ch);
curl_close($ch);
//cdn check
if (preg_match("/(cdn)/", $subject)) {
$cdn = true;
} else {
$cdn = false;
}
It worked when checking a website containing this HTML:
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
But failed when checking a website containing this HTML:
<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.0.3/cookieconsent.min.css" />
Dispite 'cdn' being in both.
Any ideas? Thanks
The second website was returning html, but the links were dynamically inserted after page load so were not being returned in the html via curl