Apache, nginx, and Lighttpd use the X-sendfile function to improve file download performance.

 

About mod_xsendfile

Https://tn123.org/mod_xsendfile/

 

X-sendfile in Lighttpd

How the ROR website uses the X-sendfile function of Lighttpd to improve File Download Performance

In the X-sendfile mode, server applications do not need to read the downloaded files. You only need to set the response header information, in addition, you need to append the "x-Lighttpd-send-file" information to Lighttpd, telling Lighttpd that the file download will not work.

 

X-sendfile in Apache

Allows PHP to provide faster file downloads

Without passing through the PHP layer, the webserver directly sends the file, and uses the Apache module mod_xsendfile to allow Apache to directly send the file to the user.

<? PHP $ file = "/tmp/Chinese name .tar.gz"; $ filename = basename ($ file); header ("Content-Type: Application/octet-stream "); // process the Chinese file name $ UA = $ _ server ["http_user_agent"]; $ encoded_filename = urlencode ($ filename); $ encoded_filename = str_replace ("+", "% 20 ", $ encoded_filename); If (preg_match ("/MSIE/", $ UA) {header ('content-Disposition: attachment; filename = "'. $ encoded_filename. '"');} else if (preg_match ("/Firefox/", $ UA) {header (" content-Disposition: attachment; filename * = \ "utf8 ''". $ filename. '"');} else {header ('content-Disposition: attachment; filename = "'. $ filename. '"');} header ('content-Disposition: attachment; filename = "'. basename ($ file ). '"'); // Let xsendfile send the file header (" X-sendfile: $ file ");

 

 

X-accel-redirect in nginx

Configure xsendfile in nginx to improve File Download Performance

The header feature called X-sendfile is used to send static files.
Nginx also has this feature, but the implementation is slightly different. It is called X-accel-redirect in nginx.

There are two features that need to be elaborated:
1. the header must contain the URI
2. The local file must be declared as internal for internal redirect and X-accel-redirect responses.

Configuration example:
Code
Location/public /{
Internal;
Root/project directory;
}

Application interface:
Code
X_accel_redirect "/project directory/public",: filename => "ISO. IMG"

In this way, nginx will send the/project directory/public/ISO. IMG file.
Other examples:
Reference
X_accel_redirect ('/path/to/image.jpg',: TYPE => 'image/JPEG ',: Disposition => 'line ')

Rails x_accel_redirect plug-in
Http://github.com/goncalossilva/X-Accel-Redirect

The header also supports the following attributes:
Code
X-accel-limit-rate: 1024
X-accel-buffering: Yes | No
X-accel-charset: UTF-8