Get all broken PDF files url in page

broken-pdf.js

function urlExists(url, text ){
	jQuery.get(url, function (response, status, xhr) {
	  if (xhr.getResponseHeader("content-type").indexOf("text") > -1){
	    //console.log( text + ' --> ' + url+ ' --> NOT PDF' );
	 } else {
	  	//console.log(xhr.getResponseHeader("content-type"));
	  	if( xhr.getResponseHeader("Content-Length") == null){
	  		console.log(xhr.getResponseHeader("Content-Length"));
	  
	    	console.log( text + ' --> ' + url+ ' --> IS PDF' );
	    }
	    }
	});
  
}
jQuery("a").each(function(){
    var url = jQuery(this).attr('href');
    var text = jQuery(this).text();
    var exists = urlExists(url, text );

});