function system_retrieve_file in Drupal 7

Same name and namespace in other branches

1. 8 core/modules/system/system.module \system_retrieve_file()
2. 9 core/modules/system/system.module \system_retrieve_file()

Attempts to get a file using drupal_http_request 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:

• 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

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.

2 calls to system_retrieve_file()

RetrieveFileTestCase::testFileRetrieving in modules/system/system.test

Invokes system_retrieve_file() in several scenarios.

update_manager_file_get in modules/update/update.manager.inc

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

File

modules/system/system.module, line 3517

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;
}