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764d15e Dec 20, 2017
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@barryvdh @Wolg @webpatser
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<?php namespace Barryvdh\Cors;
use Asm89\Stack\CorsService;
use Illuminate\Contracts\Http\Kernel;
use Illuminate\Support\ServiceProvider as BaseServiceProvider;
class ServiceProvider extends BaseServiceProvider
{
/**
* Indicates if loading of the provider is deferred.
*
* @var bool
*/
protected $defer = false;
/**
* Register the service provider.
*
* @return void
*/
public function register()
{
$this->mergeConfigFrom($this->configPath(), 'cors');
$this->app->singleton(CorsService::class, function ($app) {
$options = $app['config']->get('cors');
if (isset($options['allowedOrigins'])) {
foreach ($options['allowedOrigins'] as $origin) {
if (strpos($origin, '*') !== false) {
$options['allowedOriginsPatterns'][] = $this->convertWildcardToPattern($origin);
}
}
}
return new CorsService($options);
});
}
/**
* Add the Cors middleware to the router.
*
*/
public function boot()
{
// Lumen is limited, so always add the preflight.
if ($this->isLumen()) {
$this->app->middleware([HandlePreflight::class]);
} else {
$this->publishes([$this->configPath() => config_path('cors.php')]);
/** @var \Illuminate\Foundation\Http\Kernel $kernel */
$kernel = $this->app->make(Kernel::class);
// When the HandleCors middleware is not attached globally, add the PreflightCheck
if (! $kernel->hasMiddleware(HandleCors::class)) {
$kernel->prependMiddleware(HandlePreflight::class);
}
}
}
protected function configPath()
{
return __DIR__ . '/../config/cors.php';
}
protected function isLumen()
{
return str_contains($this->app->version(), 'Lumen');
}
/**
* Create a pattern for a wildcard, based on Str::is() from Laravel
*
* @see https://github.com/laravel/framework/blob/5.5/src/Illuminate/Support/Str.php
* @param $pattern
* @return string
*/
protected function convertWildcardToPattern($pattern)
{
$pattern = preg_quote($pattern, '#');
// Asterisks are translated into zero-or-more regular expression wildcards
// to make it convenient to check if the strings starts with the given
// pattern such as "library/*", making any string check convenient.
$pattern = str_replace('\*', '.*', $pattern);
return '#^'.$pattern.'\z#u';
}
}