stage_file_proxy.module in Stage File Proxy 6

File

stage_file_proxy.module

<?php

function stage_file_proxy_init() {

  // make sure we're asking for a file in the files dir
  $file_dir = file_directory_path();
  if (strpos($_GET['q'], $file_dir) !== 0) {
    return;
  }
  $relative_path = substr($_GET['q'], strlen($file_dir) + 1);

  // get origin server
  $server = variable_get('stage_file_proxy_origin', NULL);
  if ($server) {

    // is this an imagecache request? if so, request only the root file and let imagecache handle resizing
    if (variable_get('stage_file_proxy_use_imagecache_root', TRUE) && strpos($relative_path, 'imagecache') === 0) {
      $relative_path = preg_replace('/imagecache\\/.*\\/(.*)/U', '$1', $relative_path);

      // This image could be in the files directory, or elsewhere in our
      // codebase. @see imagecache_create_path().
      if (file_exists($file_dir . '/' . $relative_path) || file_exists($relative_path)) {
        return;

        // imagecache can generate it without our help.
      }
    }
    if (variable_get('stage_file_proxy_hotlink', FALSE)) {
      header("Location: {$server}/{$_GET['q']}");
      exit;
    }
    elseif (_stage_file_proxy_fetch($server, $relative_path)) {

      // Just refresh this request and let the web server work out the mime type, etc.
      header("Location: /{$_GET['q']}");
      exit;
    }
    else {
      die('Stage File Proxy encountered an unknown error');
    }
  }
}

/**
 * Downloads a remote file and saves it to the local files directory.
 *
 * @param string $server
 *   The origin server URL.
 * @param string $relative_path
 *   The path to the requested resource relative to the files directory.
 *
 * @return bool
 */
function _stage_file_proxy_fetch($server, $relative_path) {
  $dirs = explode('/', $relative_path);
  $filename = array_pop($dirs);
  $tree = array();
  $file_dir = file_directory_path();
  $dir_path = $file_dir;
  $dir_checks = array();
  foreach ($dirs as $dir) {
    $tree[] = $dir;
    $dir_path = $file_dir . '/' . implode('/', $tree);
    $dir_checks[] = $dir_path;
  }
  $url = $server . '/' . $dir_path . '/' . rawurlencode($filename);
  $ch = curl_init($url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
  curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15');
  $res = curl_exec($ch);
  if (curl_getinfo($ch, CURLINFO_HTTP_CODE) < 300) {

    // If the full directory path does not exist, check and create each subdirectory.
    if (!file_check_directory($dir_path, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
      foreach ($dir_checks as $dir) {
        if (!file_check_directory($dir, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
          return FALSE;
        }
      }
    }
    file_put_contents($file_dir . '/' . $relative_path, $res);
    return TRUE;
  }
  return FALSE;
}

Functions

Name	Description
stage_file_proxy_init
_stage_file_proxy_fetch	Downloads a remote file and saves it to the local files directory.