if-modified-since

[Matthew Berk]

Does anyone have any code snippets demonstrating the generation of an 
if-modified-since header from within a mod_perl script? Using 
apache2/mod_perl on redhat. We process templates using text::template, 
and generate our own content-type header, but from what I can tell, 
apache doesn't prepend the if-modified-since header to our pages. I'd 
like to help google and others to NOT hammer our servers.... ;)

Thanks in advance,
Matthew
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