function FileUrlGenerator::generate

Overrides FileUrlGeneratorInterface::generate

File

core/lib/Drupal/Core/File/FileUrlGenerator.php, line 154

Class

FileUrlGenerator

Default implementation for the file URL generator service.

Namespace

Code

public function generate(string $uri) : Url {
    // Allow the URI to be altered, e.g. to serve a file from a CDN or static
    // file server.
    $this->moduleHandler
        ->alter('file_url', $uri);
    $scheme = StreamWrapperManager::getScheme($uri);
    if (!$scheme) {
        // Allow for:
        // - root-relative URIs (e.g. /foo.jpg in http://example.com/foo.jpg)
        // - protocol-relative URIs (e.g. //bar.jpg, which is expanded to
        //   http://example.com/bar.jpg by the browser when viewing a page over
        //   HTTP and to https://example.com/bar.jpg when viewing a HTTPS page)
        // Both types of relative URIs are characterized by a leading slash, hence
        // we can use a single check.
        if (mb_substr($uri, 0, 2) == '//') {
            return Url::fromUri($uri);
        }
        elseif (mb_substr($uri, 0, 1) == '/') {
            return Url::fromUri('base:' . str_replace($this->requestStack
                ->getCurrentRequest()
                ->getBasePath(), '', $uri));
        }
        else {
            // If this is not a properly formatted stream, then it is a shipped
            // file. Therefore, return the urlencoded URI.
            $options = UrlHelper::parse($uri);
            return Url::fromUri('base:' . UrlHelper::encodePath($options['path']), $options);
        }
    }
    elseif ($scheme == 'http' || $scheme == 'https' || $scheme == 'data') {
        // Check for HTTP and data URI-encoded URLs so that we don't have to
        // implement getExternalUrl() for the HTTP and data schemes.
        $options = UrlHelper::parse($uri);
        return Url::fromUri(urldecode($options['path']), $options);
    }
    elseif ($wrapper = $this->streamWrapperManager
        ->getViaUri($uri)) {
        $external_url = $wrapper->getExternalUrl();
        $options = UrlHelper::parse($external_url);
        // @todo Switch to dependency injected request_context service after
        // https://www.drupal.org/project/drupal/issues/3256884 is fixed.
        if (UrlHelper::externalIsLocal($external_url, \Drupal::service('router.request_context')->getCompleteBaseUrl())) {
            // Attempt to return an external URL using the appropriate wrapper.
            return Url::fromUri('base:' . $this->transformRelative(urldecode($options['path']), FALSE), $options);
        }
        else {
            return Url::fromUri(urldecode($options['path']), $options);
        }
    }
    throw new InvalidStreamWrapperException();
}