我正在尝试使用JS AJAX解析XML响应响应来自SAML的注销请求
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<apm_do_not_touch>
<body onload="document.forms[0].submit()">
<noscript>
<p> <strong> Your browser does not support JavaScript, press the Continue button once to proceed. </strong></p>
</noscript>
<form action="https://sp.company.lab/saml/sp/profile/post/sls" method="post">
<input type="hidden" name="SAMLRequest" value="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"/>
<noscript>
<div>
<input type="submit" value="Continue"/>
</div>
</noscript>
</form>
</body>
</apm_do_not_touch>
</html>
如何获取参数“ SAMLRequest”的值？
var val = $(responseText).find('input[name="SAMLRequest"]').val();