class ExceptionHandlingTest

class ExceptionHandlingTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'router_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('date_format');
    }
    
    /**
     * Tests on a route with a non-supported HTTP method.
     */
    public function test405() {
        $request = Request::create('/router_test/test15', 'PATCH');
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request);
        $this->assertEquals(Response::HTTP_METHOD_NOT_ALLOWED, $response->getStatusCode());
    }
    
    /**
     * Tests the exception handling for json and 403 status code.
     */
    public function testJson403() {
        $request = Request::create('/router_test/test15');
        $request->query
            ->set('_format', 'json');
        $request->setRequestFormat('json');
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request);
        $this->assertEquals(Response::HTTP_FORBIDDEN, $response->getStatusCode());
        $this->assertEquals('application/json', $response->headers
            ->get('Content-type'));
        $this->assertEquals('{"message":""}', $response->getContent());
        $this->assertInstanceOf(CacheableJsonResponse::class, $response);
    }
    
    /**
     * Tests the exception handling for json and 404 status code.
     */
    public function testJson404() {
        $request = Request::create('/not-found');
        $request->query
            ->set('_format', 'json');
        $request->setRequestFormat('json');
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request);
        $this->assertEquals(Response::HTTP_NOT_FOUND, $response->getStatusCode());
        $this->assertEquals('application/json', $response->headers
            ->get('Content-type'));
        $this->assertEquals('{"message":"No route found for \\u0022GET \\/not-found\\u0022"}', $response->getContent());
    }
    
    /**
     * Tests the exception handling for HTML and 403 status code.
     */
    public function testHtml403() {
        $request = Request::create('/router_test/test15');
        $request->setFormat('html', [
            'text/html',
        ]);
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request)
            ->prepare($request);
        $this->assertEquals(Response::HTTP_FORBIDDEN, $response->getStatusCode());
        $this->assertEquals('text/html; charset=UTF-8', $response->headers
            ->get('Content-type'));
    }
    
    /**
     * Tests the exception handling for HTML and 404 status code.
     */
    public function testHtml404() {
        $request = Request::create('/not-found');
        $request->setFormat('html', [
            'text/html',
        ]);
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request)
            ->prepare($request);
        $this->assertEquals(Response::HTTP_NOT_FOUND, $response->getStatusCode());
        $this->assertEquals('text/html; charset=UTF-8', $response->headers
            ->get('Content-type'));
    }
    
    /**
     * Tests that the exception response is executed in the original context.
     */
    public function testExceptionResponseGeneratedForOriginalRequest() {
        // Test with 404 path pointing to a route that uses '_controller'.
        $response = $this->doTest404Route('/router_test/test25');
        $this->assertStringContainsString('/not-found', $response->getContent());
        // Test with 404 path pointing to a route that uses '_form'.
        $response = $this->doTest404Route('/router_test/test26');
        $this->assertStringContainsString('<form class="system-logging-settings"', $response->getContent());
        // Test with 404 path pointing to a route that uses '_entity_form'.
        $response = $this->doTest404Route('/router_test/test27');
        $this->assertStringContainsString('<form class="date-format-add-form date-format-form"', $response->getContent());
    }
    
    /**
     * Sets the given path to use as the 404 page and triggers a 404.
     *
     * @param string $path
     *   The path to test.
     *
     * @return \Drupal\Core\Render\HtmlResponse
     *
     * @see \Drupal\system\Tests\Routing\ExceptionHandlingTest::testExceptionResponseGeneratedForOriginalRequest()
     */
    protected function doTest404Route($path) {
        $this->config('system.site')
            ->set('page.404', $path)
            ->save();
        $request = Request::create('/not-found');
        $request->setFormat('html', [
            'text/html',
        ]);
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        return $kernel->handle($request)
            ->prepare($request);
    }
    
    /**
     * Tests if exception backtraces are properly escaped when output to HTML.
     */
    public function testBacktraceEscaping() {
        // Enable verbose error logging.
        $this->config('system.logging')
            ->set('error_level', ERROR_REPORTING_DISPLAY_VERBOSE)
            ->save();
        $request = Request::create('/router_test/test17');
        $request->setFormat('html', [
            'text/html',
        ]);
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request)
            ->prepare($request);
        $this->assertEquals(Response::HTTP_INTERNAL_SERVER_ERROR, $response->getStatusCode());
        $this->assertEquals('text/html; charset=UTF-8', $response->headers
            ->get('Content-type'));
        // Test both that the backtrace is properly escaped, and that the unescaped
        // string is not output at all.
        $this->assertStringContainsString(Html::escape('<script>alert(\'xss\')</script>'), $response->getContent());
        $this->assertStringNotContainsString('<script>alert(\'xss\')</script>', $response->getContent());
    }
    
    /**
     * Tests exception message escaping.
     */
    public function testExceptionEscaping() {
        // Enable verbose error logging.
        $this->config('system.logging')
            ->set('error_level', ERROR_REPORTING_DISPLAY_VERBOSE)
            ->save();
        // Using \Drupal\Component\Render\FormattableMarkup.
        $request = Request::create('/router_test/test24');
        $request->setFormat('html', [
            'text/html',
        ]);
        
        /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request)
            ->prepare($request);
        $this->assertEquals(Response::HTTP_INTERNAL_SERVER_ERROR, $response->getStatusCode());
        $this->assertEquals('text/html; charset=UTF-8', $response->headers
            ->get('Content-type'));
        // Test message is properly escaped, and that the unescaped string is not
        // output at all.
        $this->setRawContent($response->getContent());
        $this->assertRaw(Html::escape('Escaped content: <p> <br> <h3>'));
        $this->assertNoRaw('<p> <br> <h3>');
        $string = '<script>alert(123);</script>';
        $request = Request::create('/router_test/test2?_format=json' . urlencode($string), 'GET');
        $kernel = \Drupal::getContainer()->get('http_kernel');
        $response = $kernel->handle($request)
            ->prepare($request);
        // As the Content-type is text/plain the fact that the raw string is
        // contained in the output would not matter, but because it is output by the
        // final exception subscriber, it is printed as partial HTML, and hence
        // escaped.
        $this->assertEquals('text/plain; charset=UTF-8', $response->headers
            ->get('Content-type'));
        $this->assertStringStartsWith('The website encountered an unexpected error. Please try again later.<br><br><em class="placeholder">Symfony\\Component\\HttpKernel\\Exception\\NotAcceptableHttpException</em>: Not acceptable format: json&lt;script&gt;alert(123);&lt;/script&gt; in <em class="placeholder">', $response->getContent());
    }

}