function system_retrieve_file

Attempts to get a file using drupal_http_request and to store it locally.

Parameters

$url: The URL of the file to grab.

$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://".

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

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

• FILE_EXISTS_REPLACE: Replace the existing file.
• FILE_EXISTS_RENAME: Append _{incrementing number} until the filename is unique.
• FILE_EXISTS_ERROR: Do nothing and return FALSE.

Return value

On success the location the file was saved to, FALSE on failure.

File

drupal/core/modules/system/system.module, line 3602

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

Code

function system_retrieve_file($url, $destination = NULL, $managed = FALSE, $replace = FILE_EXISTS_RENAME) {
  $parsed_url = parse_url($url);
  if (!isset($destination)) {
    $path = file_build_uri(drupal_basename($parsed_url['path']));
  }
  else {
    if (is_dir(drupal_realpath($destination))) {

      // Prevent URIs with triple slashes when glueing parts together.
      $path = str_replace('///', '//', "{$destination}/") . drupal_basename($parsed_url['path']);
    }
    else {
      $path = $destination;
    }
  }
  $result = drupal_http_request($url);
  if ($result->code != 200) {
    drupal_set_message(t('HTTP error @errorcode occurred when trying to fetch @remote.', array(
      '@errorcode' => $result->code,
      '@remote' => $url,
    )), 'error');
    return FALSE;
  }
  $local = $managed ? file_save_data($result->data, $path, $replace) : file_unmanaged_save_data($result->data, $path, $replace);
  if (!$local) {
    drupal_set_message(t('@remote could not be saved to @path.', array(
      '@remote' => $url,
      '@path' => $path,
    )), 'error');
  }
  return $local;
}