X-Sendfile support for fetch.php

This patch enables the use of the X-Sendfile extension offered by certain
webservers to deliver static files after running a dynamic script. This
combines the flexibility of a PHP file to check for authorization, caching
and resizing with the low memory footprint and high performance of static
file delivery of the webserver.

See http://blog.lighttpd.net/articles/2006/07/02/x-sendfile for details

darcs-hash:20071008185019-7ad00-1e6d4768fb60d58955e4253c7786eaf8cf13d0bb.gz

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/exe/fetch.php b/lib/exe/fetch.php
index 71ec2870b..d29ed9f64 100644
--- a/lib/exe/fetch.php
+++ b/lib/exe/fetch.php
@@ -104,16 +104,28 @@ function sendFile($file,$mime,$cache){
     header('Cache-Control: must-revalidate, no-transform, post-check=0, pre-check=0');
     header('Pragma: public');
   }
-  header('Accept-Ranges: bytes');
   //send important headers first, script stops here if '304 Not Modified' response
   http_conditionalRequest($fmtime);
-  list($start,$len) = http_rangeRequest(filesize($file));
+
 
   //application mime type is downloadable
   if(substr($mime,0,11) == 'application'){
     header('Content-Disposition: attachment; filename="'.basename($file).'";');
   }
 
+  //use x-sendfile header to pass the delivery to compatible webservers
+  if($conf['xsendfile'] == 1){
+    header("X-LIGHTTPD-send-file: $file");
+    exit;
+  }elseif($conf['xsendfile'] == 2){
+    header("X-Sendfile: $file");
+    exit;
+  }
+
+  //support download continueing
+  header('Accept-Ranges: bytes');
+  list($start,$len) = http_rangeRequest(filesize($file));
+
   // send file contents
   $fp = @fopen($file,"rb");
   if($fp){