MIT SIPB Script Services for Athena

Why shouldn't I use URLs?

Early versions of the webhosting platform used URLs of the form (or Those URLs still work, but have long since been deprecated in favor of URLs like Current autoinstallers and documentation all use the new form of the URLs (if you find exceptions, please contact us).

The older ~ form of URLs, in addition to being aesthetically unpleasing, is incompatible with the modern web’s security model. Under the “same-origin policy”, browsers consider a site at to be run by the same group as one at, and allow JavaScript from the latter to interfere with the former. (You can read more at Wikipedia or the Mozilla Developer Network.) As a result, using ~ URLs is discouraged and will stop working entirely at some point in the future.

© 2004-2020, the SIPB project.
These pages may be reused under either the GFDL 1.2 or CC-BY-SA 3.0.
Questions? Contact

You are currently connected to