<?php
namespace Livewire\Controllers;
trait CanPretendToBeAFile
{
public function pretendResponseIsFile($file, $mimeType = 'application/javascript')
{
$expires = strtotime('+1 year');
$lastModified = filemtime($file);
$cacheControl = 'public, max-age=31536000';
if ($this->matchesCache($lastModified)) {
return response()->make('', 304, [
'Expires' => $this->httpDate($expires),
'Cache-Control' => $cacheControl,
]);
}
return response()->file($file, [
'Content-Type' => "$mimeType; charset=utf-8",
'Expires' => $this->httpDate($expires),
'Cache-Control' => $cacheControl,
'Last-Modified' => $this->httpDate($lastModified),
]);
}
protected function matchesCache($lastModified)
{
$ifModifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'] ?? '';
return @strtotime($ifModifiedSince) === $lastModified;
}
protected function httpDate($timestamp)
{
return sprintf('%s GMT', gmdate('D, d M Y H:i:s', $timestamp));
}
}