DOMPDF not downloading file when using AJAX - ajax

Question

I'm trying to work with the BarryVdh/DOMPDF code in my Laravel project.
I made a page with a print button, with
Print
This is calling the controller function :
public function printFacturen(Request $request) {
$facturen = Factuur::all();
view()->share('facturen', $facturen);
$pdf = PDF::loadView('pdf.facturen');
return $pdf->download('invoice.pdf');
}
This is successfully downloading the PDF file.
My route is :
Route::get('/print-facturen', 'PrintController#printFacturen')->name('print_overzicht_facturen');
But, I need the content of a radio button to fill my PDF instead.
So I change my a href to
Print
I add a jQuery function :
$(".printbtn").click(function(e)
{
var option = $("input[name='factuur_selectie']:checked").val();
$.ajax({
type: 'POST',
url: 'print-facturen',
data: {"optionID": option}
})
});
And my controller is changed to
public function printFacturen(Request $request) {
$option = $request->get('optionID');
$facturen = Factuur::all();
$searchFacturen = new \Illuminate\Database\Eloquent\Collection();
foreach ($facturen as $factuur) {
if ($option == 1) {
$searchFacturen->add($factuur);
}
else if ($option == 2) {
if ($factuur->voldaan == true) {
$searchFacturen->add($factuur);
}
}
else if ($option == 3) {
if ($factuur->voldaan == false) {
$searchFacturen->add($factuur);
}
}
}
view()->share('facturen', $searchFacturen);
$pdf = PDF::loadView('pdf.facturen');
return $pdf->download('invoice.pdf');
}
I can see my optionID successfully, but the PDF file is NOT being downloaded anymore ... :-(
As I got a POST error, I added this route :
Route::post('/print-facturen', 'PrintController#printFacturen')->name('print_overzicht_facturen');
When inspecting the network, I see this :
SORRY, I'm not allowed yet to post pictures here :-(
(https://user-images.githubusercontent.com/5870500/32404394-3555952c-c14f-11e7-82c3-2d000d1a2661.png)
What am I doing wrong ?
Best regards,
Davy

Answer 1

You need to set proper http response headers:
header('Content-Type: application/octet-stream; charset=utf-8');
header('Content-Disposition: attachment; filename="'.$filename.'"');
Other simple option to do it will be to dynamic modify link on radio click to get link like: example.org/download?radio=1