Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of fruitcake/php-cors and was originally part of asm89/stack-cors

 *

 * (c) Alexander <iam.asm89@gmail.com>

 * (c) Barryvdh <barryvdh@gmail.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Fruitcake\Cors;

use Fruitcake\Cors\Exceptions\InvalidOptionException;

use Symfony\Component\HttpFoundation\Request;

use Symfony\Component\HttpFoundation\Response;

/**

 * @phpstan-type CorsInputOptions array{

 *  'allowedOrigins'?: string[],

 *  'allowedOriginsPatterns'?: string[],

 *  'supportsCredentials'?: bool,

 *  'allowedHeaders'?: string[],

 *  'allowedMethods'?: string[],

 *  'exposedHeaders'?: string[]|false,

 *  'maxAge'?: int|bool|null,

 *  'allowed_origins'?: string[],

 *  'allowed_origins_patterns'?: string[],

 *  'supports_credentials'?: bool,

 *  'allowed_headers'?: string[],

 *  'allowed_methods'?: string[],

 *  'exposed_headers'?: string[]|false,

 *  'max_age'?: int|bool|null

 * }

 *

 */

class CorsService

{

    /** @var string[]  */

    private array $allowedOrigins = [];

    /** @var string[] */

    private array $allowedOriginsPatterns = [];

    /** @var string[] */

    private array $allowedMethods = [];

    /** @var string[] */

    private array $allowedHeaders = [];

    /** @var string[] */

    private array $exposedHeaders = [];

    private bool $supportsCredentials = false;

    private ?int $maxAge = 0;

    private bool $allowAllOrigins = false;

    private bool $allowAllMethods = false;

    private bool $allowAllHeaders = false;

    /**

     * @param CorsInputOptions $options

     */

    public function __construct(array $options = [])

    {

        if ($options) {

            $this->setOptions($options);

        }

    }

    /**

     * @param CorsInputOptions $options

     */

    public function setOptions(array $options): void

    {

        $this->allowedOrigins = $options['allowedOrigins'] ?? $options['allowed_origins'] ?? $this->allowedOrigins;

        $this->allowedOriginsPatterns =

            $options['allowedOriginsPatterns'] ?? $options['allowed_origins_patterns'] ?? $this->allowedOriginsPatterns;

        $this->allowedMethods = $options['allowedMethods'] ?? $options['allowed_methods'] ?? $this->allowedMethods;

        $this->allowedHeaders = $options['allowedHeaders'] ?? $options['allowed_headers'] ?? $this->allowedHeaders;

        $this->supportsCredentials =

            $options['supportsCredentials'] ?? $options['supports_credentials'] ?? $this->supportsCredentials;

        $maxAge = $this->maxAge;

        if (array_key_exists('maxAge', $options)) {

            $maxAge = $options['maxAge'];

        } elseif (array_key_exists('max_age', $options)) {

            $maxAge = $options['max_age'];

        }

        $this->maxAge = $maxAge === null ? null : (int)$maxAge;

        $exposedHeaders = $options['exposedHeaders'] ?? $options['exposed_headers'] ?? $this->exposedHeaders;

        $this->exposedHeaders = $exposedHeaders === false ? [] : $exposedHeaders;

        $this->normalizeOptions();

    }

    private function normalizeOptions(): void

    {

        // Normalize case

        $this->allowedHeaders = array_map('strtolower', $this->allowedHeaders);

        $this->allowedMethods = array_map('strtoupper', $this->allowedMethods);

        // Normalize ['*'] to true

        $this->allowAllOrigins = in_array('*', $this->allowedOrigins);

        $this->allowAllHeaders = in_array('*', $this->allowedHeaders);

        $this->allowAllMethods = in_array('*', $this->allowedMethods);

        // Transform wildcard pattern

        if (!$this->allowAllOrigins) {

            foreach ($this->allowedOrigins as $origin) {

                if (strpos($origin, '*') !== false) {

                    $this->allowedOriginsPatterns[] = $this->convertWildcardToPattern($origin);

                }

            }

        }

    }

    /**

     * 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 string $pattern

     * @return string

     */

    private 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 "*.example.com", making any string check convenient.

        $pattern = str_replace('\*', '.*', $pattern);

        return '#^' . $pattern . '\z#u';

    }

    public function isCorsRequest(Request $request): bool

    {

        return $request->headers->has('Origin');

    }

    public function isPreflightRequest(Request $request): bool

    {

        return $request->getMethod() === 'OPTIONS' && $request->headers->has('Access-Control-Request-Method');

    }

    public function handlePreflightRequest(Request $request): Response

    {

        $response = new Response();

        $response->setStatusCode(204);

        return $this->addPreflightRequestHeaders($response, $request);

    }

    public function addPreflightRequestHeaders(Response $response, Request $request): Response

    {

        $this->configureAllowedOrigin($response, $request);

        if ($response->headers->has('Access-Control-Allow-Origin')) {

            $this->configureAllowCredentials($response, $request);

            $this->configureAllowedMethods($response, $request);

            $this->configureAllowedHeaders($response, $request);

            $this->configureMaxAge($response, $request);

        }

        return $response;

    }

    public function isOriginAllowed(Request $request): bool

    {

        if ($this->allowAllOrigins === true) {

            return true;

        }

        $origin = (string) $request->headers->get('Origin');

        if (in_array($origin, $this->allowedOrigins)) {

            return true;

        }

        foreach ($this->allowedOriginsPatterns as $pattern) {

            if (preg_match($pattern, $origin)) {

                return true;

            }

        }

        return false;

    }

    public function addActualRequestHeaders(Response $response, Request $request): Response

    {

        $this->configureAllowedOrigin($response, $request);

        if ($response->headers->has('Access-Control-Allow-Origin')) {

            $this->configureAllowCredentials($response, $request);

            $this->configureExposedHeaders($response, $request);

        }

        return $response;

    }

    private function configureAllowedOrigin(Response $response, Request $request): void

    {

        if ($this->allowAllOrigins === true && !$this->supportsCredentials) {

            // Safe+cacheable, allow everything

            $response->headers->set('Access-Control-Allow-Origin', '*');

        } elseif ($this->isSingleOriginAllowed()) {

            // Single origins can be safely set

            $response->headers->set('Access-Control-Allow-Origin', array_values($this->allowedOrigins)[0]);

        } else {

            // For dynamic headers, set the requested Origin header when set and allowed

            if ($this->isCorsRequest($request) && $this->isOriginAllowed($request)) {

                $response->headers->set('Access-Control-Allow-Origin', (string) $request->headers->get('Origin'));

            }

            $this->varyHeader($response, 'Origin');

        }

    }

    private function isSingleOriginAllowed(): bool

    {

        if ($this->allowAllOrigins === true || count($this->allowedOriginsPatterns) > 0) {

            return false;

        }

        return count($this->allowedOrigins) === 1;

    }

    private function configureAllowedMethods(Response $response, Request $request): void

    {

        if ($this->allowAllMethods === true) {

            $allowMethods = strtoupper((string) $request->headers->get('Access-Control-Request-Method'));

            $this->varyHeader($response, 'Access-Control-Request-Method');

        } else {

            $allowMethods = implode(', ', $this->allowedMethods);

        }

        $response->headers->set('Access-Control-Allow-Methods', $allowMethods);

    }

    private function configureAllowedHeaders(Response $response, Request $request): void

    {

        if ($this->allowAllHeaders === true) {

            $allowHeaders = (string) $request->headers->get('Access-Control-Request-Headers');

            $this->varyHeader($response, 'Access-Control-Request-Headers');

        } else {

            $allowHeaders = implode(', ', $this->allowedHeaders);

        }

        $response->headers->set('Access-Control-Allow-Headers', $allowHeaders);

    }

    private function configureAllowCredentials(Response $response, Request $request): void

    {

        if ($this->supportsCredentials) {

            $response->headers->set('Access-Control-Allow-Credentials', 'true');

        }

    }

    private function configureExposedHeaders(Response $response, Request $request): void

    {

        if ($this->exposedHeaders) {

            $response->headers->set('Access-Control-Expose-Headers', implode(', ', $this->exposedHeaders));

        }

    }

    private function configureMaxAge(Response $response, Request $request): void

    {

        if ($this->maxAge !== null) {

            $response->headers->set('Access-Control-Max-Age', (string) $this->maxAge);

        }

    }

    public function varyHeader(Response $response, string $header): Response

    {

        if (!$response->headers->has('Vary')) {

            $response->headers->set('Vary', $header);

        } elseif (!in_array($header, explode(', ', (string) $response->headers->get('Vary')))) {

            $response->headers->set('Vary', ((string) $response->headers->get('Vary')) . ', ' . $header);

        }

        return $response;

    }

}