I'm trying to work on the map to storage example. Here is what we have now:
1) From httpd-2.0/CHANGES:
*) Introduce the map_to_storage hook, which allows modules to bypass
the directory_walk and file_walk for non-file requests. TRACE
shortcut moved to http_protocol.c as APR_HOOK_MIDDLE, and the
directory_walk/file_walk happen as APR_HOOK_VERY_LAST in core.c.
[William Rowe]s/APR_HOOK_VERY_LAST/APR_HOOK_REALLY_LAST/ in that comment.
2) And mod_perl hooks in as:
int modperl_map_to_storage_handler(request_rec *r)
{
return modperl_callback_per_srv(MP_MAP_TO_STORAGE_HANDLER, r, MP_HOOK_RUN_FIRST);
}
3) and there is ap_send_http_trace in http_protocol.c, registered as: ap_hook_map_to_storage(ap_send_http_trace,NULL,NULL,APR_HOOK_MIDDLE);
So we have a problem here. If one uses PerlMapToStorageHandler to shortcut the uri2file translation, and returns OK, TRACE calls will be not handled at all. since at the moment mod_perl runs its handler before ap_send_http_trace had a chance to run.
Of course one could start their PerlMapToStorageHandler with:
if ($r->method_number != Apache::M_TRACE) {
return Apache::DECLINED;
}as a workaround, but this sounds ugly. May be registering that hook on the mod_perl side as APR_HOOK_LAST is a better idea? But how can we be sure that tomorrow Apache won't have some other callback in the middle that we may not want to run?
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