[Zope] Precondition for file

[Evan Simpson]

Precondition is just a hook which allows File and its subclasses to veto
rendering by raising an exception. If 'precondition' is set, it is treated
as the name of a method of the object.  This method is called during
invocation of 'index_html' (the method called eg. if the object is addressed
directly by a URL).

----- Original Message -----
From: Jim Sanford <jsanford@atinucleus.com>
> What is the purpose of the precondition entry for a file object and how do
I use it?

It's not documented (AFAIK) except by reference to the source.

Cheers,

Evan @ digicool