> I was sure cgi.content_length wouldn't work either, but since I
> hadn't tried the method I tested it to get some empirical data.
>
> It is all server side. At least with WebSite, cgi.content_length
> isn't available until after the file is transmitted.

This is true for any web server, as the content length is in the header for
the HTTP request which contains the file itself. It's a MIME thing; the
browser says, "Here's the data string, and it's x characters long."

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
voice: (202) 797-5496
fax: (202) 797-5444

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