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<?php namespace Stevenmaguire\Laravel\Http\Middleware; |
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use Closure; |
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use Exception; |
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use Illuminate\Http\Response; |
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use GuzzleHttp\Psr7\Response as PsrResponse; |
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use Psr\Http\Message\ResponseInterface; |
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use Stevenmaguire\Http\Middleware\EnforceContentSecurity as BaseMiddleware; |
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class EnforceContentSecurity extends BaseMiddleware |
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{ |
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/** |
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* Config closure; |
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* |
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* @var Closure |
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*/ |
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protected $config; |
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/** |
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* Creates new middleware instance. |
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*/ |
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public function __construct() |
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{ |
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$this->setConfigClosure(function ($key = null, $default = null) { |
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// @codeCoverageIgnoreStart |
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if (function_exists('config')) { |
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return config($key, $default); |
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} |
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return null; |
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// @codeCoverageIgnoreEnd |
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}); |
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} |
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/** |
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* Handles an incoming request. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @param \Closure $next |
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* @return mixed |
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*/ |
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public function handle($request, Closure $next) |
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{ |
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$response = $next($request); |
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if ($response instanceof Response) { |
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$this->setProfiles($this->getProfileConfig()); |
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$this->setProfilesWithParameters(func_get_args()); |
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$exception = $response->exception; |
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$psr7Response = $this->createPsr7Response($response); |
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$psr7Response = $this->addPolicyHeader($psr7Response); |
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$response = $this->createLaravelResponse($psr7Response); |
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if ($exception instanceof Exception) { |
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$response->withException($exception); |
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} |
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} |
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return $response; |
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} |
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/** |
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* Creates Laravel response object from PSR 7 response. |
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* |
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* @param ResponseInterface $response |
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* |
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* @return Response |
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*/ |
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protected function createLaravelResponse(ResponseInterface $response) |
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{ |
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return new Response( |
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(string) $response->getBody(), |
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$response->getStatusCode(), |
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$response->getHeaders() |
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); |
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} |
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/** |
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* Creates PSR 7 response object from Laravel response. |
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* |
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* @param Response $response |
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* |
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* @return ResponseInterface |
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*/ |
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protected function createPsr7Response(Response $response) |
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{ |
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return new PsrResponse( |
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$response->getStatusCode(), |
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$response->headers->all(), |
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$response->getContent(), |
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$response->getProtocolVersion() |
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); |
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} |
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/** |
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* Retrives profile configuration from Laravel config object. |
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* |
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* @return array |
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*/ |
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protected function getProfileConfig() |
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{ |
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$configCallable = $this->config; |
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$config = $configCallable($this->getProfileConfigKey()); |
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if (!is_array($config)) { |
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$config = [$config]; |
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} |
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return array_filter($config); |
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} |
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/** |
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* Retrieves configuration key associated with content security profiles. |
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* |
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* @return string |
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*/ |
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protected function getProfileConfigKey() |
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{ |
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return 'security.content'; |
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} |
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/** |
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* Gets profiles from handle method arguments. |
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* |
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* @param array $arguments |
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* |
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* @return array |
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*/ |
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protected function getProfilesFromArguments(array $arguments) |
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{ |
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$profiles = []; |
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if (count($arguments) > 2) { |
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unset($arguments[0]); |
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unset($arguments[1]); |
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$profiles = $arguments; |
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} |
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return $profiles; |
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} |
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/** |
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* Updates config callable used to access application configuration data. |
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* |
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* @param Closure $config |
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* |
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* @return EnforceContentSecurity |
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*/ |
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6 |
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public function setConfigClosure(Closure $config) |
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{ |
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$this->config = $config; |
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return $this; |
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} |
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/** |
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* Updates policy configuration with rules from each profile in given parameters. |
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* |
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* @param array $parameters |
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* |
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* @return void |
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*/ |
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protected function setProfilesWithParameters(array $parameters) |
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{ |
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$profiles = $this->getProfilesFromArguments($parameters); |
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array_map([$this, 'loadProfileByKey'], $profiles); |
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} |
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} |
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stevenmaguire /
laravel-middleware-csp
