Format

Enter one mapping per line, in the format <URL>[|<extensions>]:

• <URL> is the CDN URL that should be used. E.g.: http://cdn-a.com However, you can also enter multiple URLs, the files will then be distributed randomly (yet consistently, meaning that the same file will always be served from the same URL) from the different URLs! E.g.: http://cdn-a.com http://cdn-b.com Note that if you want to save just a few more bytes, you should use protocol-relative URLs: //cdn-a.com instead of http://cdn-a.com (this works fine in all browsers).
• <extensions> is an optional setting to limit which files should be served from a CDN. E.g.: .css .jpg .jpeg .png

Sample mappings

• This would serve all files from a single CDN:

  http://cdn-a.com

• This would serve CSS files and images from CDN A, .zip files from CDN B and everything else from CDN C:

  http://cdn-a.com|.css .jpg .jpeg .png
  http://cdn-b.com|.zip
  http://cdn-c.com

• This would serve CSS and JS files from CDN A, images from either CDN B or C and everything else from CDN C:

  http://cdn-a.com|.css .js
  http://cdn-b.com http://cdn-c.com|.jpg .jpeg .png
  http://cdn-c.com