Should this: cache_in_filter_handle = ap_register_output_filter("CACHE_IN", cache_in_filter, NULL, AP_FTYPE_CONTENT_SET-1);
Actually be this:
cache_in_filter_handle = ap_register_output_filter("CACHE_IN", cache_in_filter, NULL, AP_FTYPE_CONTENT_SET+1);
Notice the plus in the second.
-- Brian Akins Senior Systems Engineer CNN Internet Technologies