Can't direct download after creating a CSV file - php

Question

I've seen a lot of answers of this type of questions but none worked for me. I've a CSV object which has a createCSV function like this :
public function createCSV($url, $delimiter = ","){
$file = fopen($url, 'w');
foreach ($this->content as $line) {
fputcsv($file, $line, $delimiter);
}
fclose($file);
}
And I want to download it directly from the browser so here is what I do :
header('Content-type: text/csv');
header('Content-Disposition: attachment; filename="'.$filename.'"');
$csv_file->createCSV('php://output');
This part of code is execute with an AJAX call and even if the header is set to text/csv the download doesn't work but in the response tab I can see the content of my csv. I've tried with different header but none of them worked. How can I do to download the CSV ?
EDIT
The thing is that I don't have a URL for my CSV and I don't want to store the file somewhere, I just want to build the file and download directly with the browser

Answer 1

Try this code:
$('#exportcsv').click(function(){
var self = this;
$.ajax({
url : '/exportcsv',
method : 'get',
success : function(response)
{
console.log(response);
var csvData = 'data:application/csv;charset=UTF-8,' + encodeURIComponent(response);
$(self).attr({
'download': 'publisher.csv',
'href': csvData,
'target': '_blank'
});
// window.open(uri, 'test.csv');
}
})
})