How to retrieve the custom variants from HTTP request header by mod_perl2?

lq jimmy <[email protected]>
Newsgroups gmane.comp.apache.mod-perl
Message-ID <[email protected]> 
Hi,

In mod_perl, i can get the custom variants which stored in header  from %ENV
directly,
but it seems not works in mod_perl2.

Any idea.

thanks!!

-LQ
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