Try this: 
$r->set_handlers( PerlHeaderParserHandler => [ \&OK ] );

[download]
There's some discussion of it in the docs. If that doesn't work, you can try manipulating the configuration from mod_perl on the fly, i.e. only add the C handler for that phase when you want it, from a perl handler that runs earlier.

In reply to Re: Disabling a C Apache handler with mod_perl by perrin
in thread Disabling a C Apache handler with mod_perl by Mutant

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