CorsIntegrationTest.php

<?php

declare (strict_types=1);
namespace Drupal\FunctionalTests\HttpKernel;

use Drupal\Core\Url;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests CORS provided by Drupal.
 *
 * @see sites/default/default.services.yml
 * @see \Asm89\Stack\Cors
 * @see \Asm89\Stack\CorsService
 *
 * @group Http
 */
class CorsIntegrationTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'test_page_test',
        'page_cache',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    public function testCrossSiteRequest() : void {
        // Test default parameters.
        $cors_config = $this->container
            ->getParameter('cors.config');
        $this->assertFalse($cors_config['enabled']);
        $this->assertSame([], $cors_config['allowedHeaders']);
        $this->assertSame([], $cors_config['allowedMethods']);
        $this->assertSame([
            '*',
        ], $cors_config['allowedOrigins']);
        $this->assertFalse($cors_config['exposedHeaders']);
        $this->assertFalse($cors_config['maxAge']);
        $this->assertFalse($cors_config['supportsCredentials']);
        // Enable CORS with the default options.
        $cors_config['enabled'] = TRUE;
        $this->setContainerParameter('cors.config', $cors_config);
        $this->rebuildContainer();
        // Fire off a request.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://example.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', '*');
        $this->assertSession()
            ->responseHeaderNotContains('Vary', 'Origin');
        // Fire the same exact request. This time it should be cached.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://example.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', '*');
        $this->assertSession()
            ->responseHeaderNotContains('Vary', 'Origin');
        // Fire a request for a different origin. Verify the CORS header.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://example.org',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', '*');
        $this->assertSession()
            ->responseHeaderNotContains('Vary', 'Origin');
        // Configure the CORS stack to match allowed origins using regex patterns.
        $cors_config['allowedOrigins'] = [];
        $cors_config['allowedOriginsPatterns'] = [
            '#^http://[a-z-]*\\.valid.com$#',
        ];
        $this->setContainerParameter('cors.config', $cors_config);
        $this->rebuildContainer();
        // Fire a request from an origin that isn't allowed.
        
        /** @var \Symfony\Component\HttpFoundation\Response $response */
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://non-valid.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderDoesNotExist('Access-Control-Allow-Origin');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Specify a valid origin.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://sub-domain.valid.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://sub-domain.valid.com');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Test combining allowedOrigins and allowedOriginsPatterns.
        $cors_config['allowedOrigins'] = [
            'http://domainA.com',
        ];
        $cors_config['allowedOriginsPatterns'] = [
            '#^http://domain[B-Z-]*\\.com$#',
        ];
        $this->setContainerParameter('cors.config', $cors_config);
        $this->rebuildContainer();
        // Specify an origin that does not match allowedOrigins nor
        // allowedOriginsPattern.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://non-valid.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderDoesNotExist('Access-Control-Allow-Origin');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Specify a valid origin that matches allowedOrigins.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://domainA.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://domainA.com');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Specify a valid origin that matches allowedOriginsPatterns.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://domainX.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://domainX.com');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Configure the CORS stack to allow a specific origin.
        $cors_config['allowedOrigins'] = [
            'http://example.com',
        ];
        $cors_config['allowedOriginsPatterns'] = [];
        $this->setContainerParameter('cors.config', $cors_config);
        $this->rebuildContainer();
        // Fire a request from an origin that isn't allowed.
        
        /** @var \Symfony\Component\HttpFoundation\Response $response */
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://non-valid.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://example.com');
        $this->assertSession()
            ->responseHeaderNotContains('Vary', 'Origin');
        // Specify a valid origin.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://example.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://example.com');
        $this->assertSession()
            ->responseHeaderNotContains('Vary', 'Origin');
        // Configure the CORS stack to allow a specific set of origins.
        $cors_config['allowedOrigins'] = [
            'http://example.com',
            'https://drupal.org',
        ];
        $this->setContainerParameter('cors.config', $cors_config);
        $this->rebuildContainer();
        // Fire a request from an origin that isn't allowed.
        
        /** @var \Symfony\Component\HttpFoundation\Response $response */
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://non-valid.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', NULL);
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Specify a valid origin.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'http://example.com',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'http://example.com');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Specify a valid origin.
        $this->drupalGet('/test-page', [], [
            'Origin' => 'https://drupal.org',
        ]);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Access-Control-Allow-Origin', 'https://drupal.org');
        $this->assertSession()
            ->responseHeaderContains('Vary', 'Origin');
        // Verify POST still functions with 'Origin' header set to site's domain.
        $origin = \Drupal::request()->getSchemeAndHttpHost();
        
        /** @var \GuzzleHttp\ClientInterface $httpClient */
        $httpClient = $this->getSession()
            ->getDriver()
            ->getClient()
            ->getClient();
        $url = Url::fromUri('base:/test-page');
        $response = $httpClient->request('POST', $url->setAbsolute()
            ->toString(), [
            'headers' => [
                'Origin' => $origin,
            ],
        ]);
        $this->assertEquals(200, $response->getStatusCode());
    }

}