Use original filename for Content-Disposition

In most cases this change will have no effect, but noes the response will use the filename that was originally requested. The downloaded filename can be modified to something different as well. E.g. the siteexport plugin will make use of it.

inc/fetch.functions.php

@@ -16,12 +16,13 @@
  * @author Andreas Gohr <andi@splitbrain.org>
  * @author Ben Coburn <btcoburn@silicodon.net>
  * @param string $file   local file to send
+ * @param string $orig   original file to send - the file name will be used for the Content-Disposition
  * @param string $mime   mime type of the file
  * @param bool   $dl     set to true to force a browser download
  * @param int    $cache  remaining cache time in seconds (-1 for $conf['cache'], 0 for no-cache)
  * @param bool   $public is this a public ressource or a private one?
  */
-function sendFile($file, $mime, $dl, $cache, $public = false) {
+function sendFile($file, $orig, $mime, $dl, $cache, $public = false) {
     global $conf;
     // send mime headers
     header("Content-Type: $mime");
@@ -64,9 +65,9 @@ function sendFile($file, $mime, $dl, $cache, $public = false) {
 
     //download or display?
     if($dl) {
-        header('Content-Disposition: attachment; filename="'.utf8_basename($file).'";');
+        header('Content-Disposition: attachment; filename="'.utf8_basename($orig).'";');
     } else {
-        header('Content-Disposition: inline; filename="'.utf8_basename($file).'";');
+        header('Content-Disposition: inline; filename="'.utf8_basename($orig).'";');
     }
 
     //use x-sendfile header to pass the delivery to compatible webservers