This may be too obvious, but why not output/copy the file to a randomly created temp dir in your web site and then print a Location header that points to it? Using CGI: 
print CGI::redirect('http;//my.url.of.temp.file');

[download]
If MIME type is unknown, browser will then ask you to save, using same filename.

Or am I missing something?

cLive ;-)

In reply to Re: Getting CGI to name a file it returns by cLive ;-)
in thread Getting CGI to name a file it returns by Torgo

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