Is there a quick way I can check a string to see if it is a regex or not?
I am looking at extending SetEnvIf to accept a regex on the 'header' argument (value
may
already be a regex). My first cut replaces this call in mod_setenvif:
val = apr_table_get(r->headers_in, b->name);
where b->name is a nonregex header name
with code that iterated through r->headers_in doing an ap_regex on each under the
assumption that b->name -may- be a regex. The problem with this is the unnecessary
performance hit on all requests when the b->name is NOT a regex (and where
apr_table_get()
will do the right thing).
pcre_infofull() seems a likely candidate but it is not clear to me which field to check
Bill
