Viewing file:  SupportFileDownloads.php (2.59 KB) -rw-r--r--
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<?php
namespace Livewire\Features;
use Illuminate\Contracts\Support\Responsable;
use Livewire\Livewire;
use Illuminate\Support\Str;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\HttpFoundation\BinaryFileResponse;
class SupportFileDownloads
{
static function init() { return new static; }
protected $downloadsById = [];
function __construct()
{
Livewire::listen('action.returned', function ($component, $action, $returned) {
if($returned instanceof Responsable){
$returned = $returned->toResponse(request());
}
if ($this->valueIsntAFileResponse($returned)) return;
$response = $returned;
$name = $this->getFilenameFromContentDispositionHeader(
$response->headers->get('Content-Disposition')
);
$binary = $this->captureOutput(function () use ($response) {
$response->sendContent();
});
$content = base64_encode($binary);
$this->downloadsById[$component->id] = [
'name' => $name,
'content' => $content,
'contentType' => $response->headers->get('Content-Type'),
];
});
Livewire::listen('component.dehydrate.subsequent', function ($component, $response) {
if (! $download = $this->downloadsById[$component->id] ?? false) return;
$response->effects['download'] = $download;
});
Livewire::listen('flush-state', function() {
$this->downloadsById = [];
});
}
function valueIsntAFileResponse($value)
{
return ! $value instanceof StreamedResponse
&& ! $value instanceof BinaryFileResponse;
}
function captureOutput($callback)
{
ob_start();
$callback();
return ob_get_clean();
}
function getFilenameFromContentDispositionHeader($header)
{
/**
* The following conditionals are here to allow for quoted and
* non quoted filenames in the Content-Disposition header.
*
* Both of these values should return the correct filename without quotes.
*
* Content-Disposition: attachment; filename=filename.jpg
* Content-Disposition: attachment; filename="test file.jpg"
*/
if (preg_match('/.*?filename="(.+?)"/', $header, $matches)) {
return $matches[1];
}
if (preg_match('/.*?filename=([^; ]+)/', $header, $matches)) {
return $matches[1];
}
return 'download';
}
}
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