1 files changed, 60 insertions, 0 deletions
diff --git a/modules/system/system.module b/modules/system/system.module
index c4224423d..807b80015 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -828,6 +828,36 @@ function system_admin_menu_block_access($path, $permission) {
 }
 
 /**
+ * Implementation of hook_filetransfer_backends().
+ */
+function system_filetransfer_backends() {
+  $backends = array();
+
+  // SSH2 lib connection is only available if the proper PHP extension is
+  // installed.
+  if (function_exists('ssh2_connect')) {
+    $backends['ssh'] = array(
+      'title' => t('SSH'),
+      'class' => 'FileTransferSSH',
+    );
+  }
+  if (function_exists('ftp_connect')) {
+    $backends['ftp_extension'] = array(
+      'title' => t('FTP Extension'),
+      'class' => 'FileTransferFTPExtension',
+    );
+  }
+
+  if (ini_get('allow_url_fopen')) {
+    $backends['ftp_wrapper'] = array(
+      'title' => t('FTP Wrapper'),
+      'class' => 'FileTransferFTPWrapper',
+    );
+  }
+  return $backends;
+}
+
+/**
  * Implement hook_init().
  */
 function system_init() {
@@ -2509,3 +2539,33 @@ function system_image_toolkits() {
     ),
   );
 }
+
+/**
+ * Attempts to get a file using drupal_http_request and to store it locally.
+ *
+ * @param $path
+ *   The URL of the file to grab.
+ * @return
+ *   On success the address the files was saved to, FALSE on failure.
+ */
+function system_retrieve_file($path) {
+  // Get each of the specified files.
+  $parsed_url = parse_url($path);
+  $local = file_directory_temp() . '/update-cache/' . basename($parsed_url['path']);
+  if (!file_exists(file_directory_temp() . '/update-cache/')) {
+    mkdir(file_directory_temp() . '/update-cache/');
+  }
+
+  // Check the cache and download the file if needed.
+  if (!file_exists($local)) {
+    // $result->data is the actual contents of the downloaded file. This saves
+    // it into a local file, whose path is stored in $local. $local is stored
+    // relative to the Drupal installation.
+    $result = drupal_http_request($path);
+    if ($result->code != 200 || !file_save_data($result->data, $local)) {
+      drupal_set_message(t('@remote could not be saved.', array('@remote' => $path)), 'error');
+      return FALSE;
+    }
+  }
+  return $local;
+}