Laravel 8 download PDF with Livewire - php

Question

On my page I am making an invoice that is fully compatible with Livewire. I use this package: https://github.com/LaravelDaily/laravel-invoices to generate my invoice and everything works fine. But their is one problem I ran into. I can't download my PDF with Livewire.
Here is a basic example to generate a PDF and download it:
public function invoice()
{
$customer = new Buyer([
'name' => 'John Doe',
'custom_fields' => [
'email' => 'test#example.com',
],
]);
$item = (new InvoiceItem())->title('Service 1')->pricePerUnit(2);
$invoice = Invoice::make()
->buyer($customer)
->discountByPercent(10)
->taxRate(15)
->shipping(1.99)
->addItem($item);
return $invoice->download();
}
Whenever I click on a button
<a role="button" class="pdf-download cursor-pointer" wire:click="invoice">download</a>
Nothing happens. So the problem is that Livewire doesn't support this download method. And this download method looks like this:
public function download()
{
$this->render();
return new Response($this->output, Response::HTTP_OK, [
'Content-Type' => 'application/pdf',
'Content-Disposition' => 'attachment; filename="' . $this->filename . '"',
'Content-Length' => strlen($this->output),
]);
}
$this->render(); Renders a template in a specific folder
Is their a work around for this? Where I can download my pdf with a template or maybe a different strategy. I allready tried one thing. I stored the invoice into a session, like so:
Session::put('invoice', $invoice);
Session::save();
And in a different controller I have.
if ($invoice = Session::get('invoice')) {
$invoice->download();
}
But that gives me this error:
serialization of 'closure' is not allowed
And I tried some stuff I found here: https://github.com/livewire/livewire/issues/483
But nothing works. Can someone give me a direction on where to look or how to fix this? Thanks!

Answer 1

return response()->streamDownload(function () use($invoice) {
echo $invoice->stream();
}, 'invoice.pdf');
Seems to do the trick.