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A simple CORS middleware for Lumen framework
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<?php | |
/* | |
* A simple CORS middleware for Lumen framework | |
* | |
* lindowx | |
*/ | |
namespace App\Http\Middleware; | |
use Closure; | |
class SimpleCorsMiddleware | |
{ | |
/** | |
* Handle an incoming request. | |
* | |
* @param \Illuminate\Http\Request $request | |
* @param \Closure $next | |
* @return mixed | |
*/ | |
public function handle($request, Closure $next) | |
{ | |
$origin = $request->header('origin'); | |
if ( | |
! empty($origin) && | |
preg_match('/^([^:]+):\/\/([^\:]+)(\:\d+)?\/?$/i', $origin, $matches) | |
) { | |
//Comma separated string contains multiple origin. | |
//Supports wildcard pattern | |
//.env variable examples: | |
// SIMPLE_CORS_ALLOWED_ORIGINS=example.com | |
// SIMPLE_CORS_ALLOWED_ORIGINS=*.example.com | |
// SIMPLE_CORS_ALLOWED_ORIGINS=test.com,*.foor.com | |
$allowedOriginsCfg = env('SIMPLE_CORS_ALLOWED_ORIGINS'); | |
$allowedOriginsPattern = str_replace( | |
[' ', ',', '.', '-', '_', '*', ], | |
['', '|', '\.', '\-', '\_', '.*', ], | |
$allowedOriginsCfg | |
); | |
$pattern = sprintf('/^(%s)$/i', $allowedOriginsPattern); | |
if ( preg_match($pattern, $matches[2],$m) ) { | |
return $next($request) | |
->header('Access-Control-Allow-Origin', $origin) | |
->header('Access-Control-Allow-Methods', '*') | |
->header('Vary', 'origin'); | |
} | |
} | |
return $next($request); | |
} | |
} |
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