function cdn_basic_get_servers in CDN 7.2

Same name and namespace in other branches

1. 6.2 cdn.basic.inc \cdn_basic_get_servers()

Gets the servers on which a file is available when basic mode is enabled.

Parameters

$path: The path to get the servers for.

1 call to cdn_basic_get_servers()

cdn_file_url_alter in ./cdn.module

Implements hook_file_url_alter().

File

./cdn.basic.inc, line 18

Logic for basic mode ("Origin Pull mode" in the UI).

Code

function cdn_basic_get_servers($path) {
  static $mapping;
  $servers = array();

  // We only need to parse the textual CDN mapping once into a lookup table.
  if (!isset($mapping)) {
    $mapping = _cdn_basic_parse_raw_mapping(cdn_basic_get_mapping());
  }

  // Parse the file extension from the given path; convert it to lower case.
  $file_extension = drupal_strtolower(pathinfo($path, PATHINFO_EXTENSION));

  // Based on the file extension, determine which key should be used to find
  // the CDN URLs in the mapping lookup table, if any.
  if (array_key_exists($file_extension, $mapping)) {
    $key = $file_extension;
  }
  elseif (array_key_exists('*', $mapping)) {
    $key = '*';
  }
  else {
    $key = NULL;
  }

  // If there is a key to look up the CDN URLs in the mapping lookup table,
  // then build the list of servers.
  if (isset($key)) {
    $base_path = base_path();
    foreach ($mapping[$key] as $cdn_url) {
      $servers[] = array(
        'server' => $cdn_url,
        'url' => $cdn_url . $base_path . $path,
      );
    }
  }
  return $servers;
}