Would it be feasible to modify this code to function recursively if the redirects to the js file that needs to be executed?
function loadScript(scriptUrl)
{
var xhr = new XMLHttpRequest();
xhr.open("GET", scriptUrl);
xhr.onreadystatechange = function()
{
if ((xhr.status == 200) && (xhr.readyState == 4))
{
eval(xhr.responseText);
}
};
xhr.send();
}
loadScript("http://www.myurl.com");
Why not consider this alternative:
$("head").append("<script src='http://myurl.com' type='text/javascript'></script>");
While it is possible to achieve the same result without using jQuery, the essence remains the same. If you are simply fetching data from a URL that only requires GET arguments (or none at all), it is more convenient (and secure) to append a new script element with its source included.
By doing so, it also addresses any redirection concerns as the browser will automatically follow the redirect.
When a URL sends you to a different location, it will typically return a 301 status code instead of a 200 status code. In this scenario, your check should be:
if ((xmlhttp.status == 200 || xmlhttp.status == 301) && xmlhttp.readyState == 4)
Alternatively, you can choose to allow all statuses except for the ones indicating errors:
if (xmlhttp.status < 400 && xmlhttp.readyState == 4)
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