function system_retrieve_file in Drupal 8

Same name and namespace in other branches

1. 7 modules/system/system.module \system_retrieve_file()
2. 9 core/modules/system/system.module \system_retrieve_file()
3. 10 core/modules/system/system.module \system_retrieve_file()

Attempts to get a file using Guzzle HTTP client and to store it locally.

Parameters

string $url: The URL of the file to grab.

string $destination: Stream wrapper URI specifying where the file should be placed. If a directory path is provided, the file is saved into that directory under its original name. If the path contains a filename as well, that one will be used instead. If this value is omitted, the site's default files scheme will be used, usually "public://".

bool $managed: If this is set to TRUE, the file API hooks will be invoked and the file is registered in the database.

int $replace: Replace behavior when the destination file already exists:

• FileSystemInterface::EXISTS_REPLACE: Replace the existing file.
• FileSystemInterface::EXISTS_RENAME: Append _{incrementing number} until the filename is unique.
• FileSystemInterface::EXISTS_ERROR: Do nothing and return FALSE.

Return value

mixed One of these possibilities:

• If it succeeds and $managed is FALSE, the location where the file was saved.
• If it succeeds and $managed is TRUE, a \Drupal\file\FileInterface object which describes the file.
• If it fails, FALSE.

3 calls to system_retrieve_file()

locale_translation_download_source in core/modules/locale/locale.batch.inc

Downloads a translation file from a remote server.

RetrieveFileTest::testFileRetrieving in core/modules/system/tests/src/Functional/System/RetrieveFileTest.php

Invokes system_retrieve_file() in several scenarios.

update_manager_file_get in core/modules/update/update.manager.inc

Copies a file from the specified URL to the temporary directory for updates.

File

core/modules/system/system.module, line 1329

Configuration system that lets administrators modify the workings of the site.

Code

function system_retrieve_file($url, $destination = NULL, $managed = FALSE, $replace = FileSystemInterface::EXISTS_RENAME) {
  $parsed_url = parse_url($url);

  /** @var \Drupal\Core\File\FileSystemInterface $file_system */
  $file_system = \Drupal::service('file_system');
  if (!isset($destination)) {
    $path = file_build_uri(\Drupal::service('file_system')
      ->basename($parsed_url['path']));
  }
  else {
    if (is_dir($file_system
      ->realpath($destination))) {

      // Prevent URIs with triple slashes when glueing parts together.
      $path = str_replace('///', '//', "{$destination}/") . \Drupal::service('file_system')
        ->basename($parsed_url['path']);
    }
    else {
      $path = $destination;
    }
  }
  try {
    $data = (string) \Drupal::httpClient()
      ->get($url)
      ->getBody();
    $local = $managed ? file_save_data($data, $path, $replace) : $file_system
      ->saveData($data, $path, $replace);
  } catch (RequestException $exception) {
    \Drupal::messenger()
      ->addError(t('Failed to fetch file due to error "%error"', [
      '%error' => $exception
        ->getMessage(),
    ]));
    return FALSE;
  } catch (FileException $e) {
    \Drupal::messenger()
      ->addError(t('Failed to save file due to error "%error"', [
      '%error' => $e
        ->getMessage(),
    ]));
    return FALSE;
  }
  if (!$local) {
    \Drupal::messenger()
      ->addError(t('@remote could not be saved to @path.', [
      '@remote' => $url,
      '@path' => $path,
    ]));
  }
  return $local;
}