Hello guys, I stuck with accessing my request.
Here's from:
<form action="http://****/ajax/" method="POST">
<label for="fname">First name:</label><br>
<input type="text" id="fname" name="fname"><br>
<label for="lname">Last name:</label><br>
<input type="text" id="lname" name="lname">
<input id="send" type="submit" value="send">
</form>
Controller method:
public function ajaxTest()
{
$fname = $this->request->getVar('fname');
print($fname);
}