Mailing List Archive

On Fri, Jun 19, 2020 at 6:05 PM <ylavic@apache.org> wrote:
>
> Author: ylavic
> Date: Fri Jun 19 16:05:56 2020
> New Revision: 1878996
>
> URL: http://svn.apache.org/viewvc?rev=1878996&view=rev
> Log:
> Re-propose ap_proxy_define_match_worker() for backport.
>
> Re new BZ 64537 (and old 43513). There's the dns/connection reuse
> compat issue spotted by covener still, to be discussed..
>
[]
> + *) mod_proxy: Add ap_proxy_define_match_worker() and use it for ProxyPassMatch
> + and ProxyMatch section to distinguish between normal workers and workers
> + with regex substitutions in the name. Implement handling of such workers
> + in ap_proxy_get_worker(). Fixes the bug when regex workers were not
> + matched and used for request. PR 43513 and 64537.
> + trunk patch: http://svn.apache.org/r1609680
> + http://svn.apache.org/r1609688
> + http://svn.apache.org/r1641381
> + http://svn.apache.org/r1826289
> + http://svn.apache.org/r1826313
> + http://svn.apache.org/r1878467
> + http://svn.apache.org/r1878994
> + 2.4.x patch: http://people.apache.org/~ylavic/patches/httpd-2.4.x-ap_proxy_define_match_worker-v4.patch
> + +1: ylavic
> + -0: covener: lots of folks getting dns and connection reuse implicitly after we backport this.
> + ylavic: reviving this, should we have an opt-in for 2.4.x?
> + (eg. an explicit enablereuse=on)

Couldn't we apply something like this for 2.4.x compat?
If so, 2.4.x only or trunk/2.5/2.6/3.0 too?

Index: modules/proxy/proxy_util.c
===================================================================
--- modules/proxy/proxy_util.c (revision 1878994)
+++ modules/proxy/proxy_util.c (working copy)
@@ -1962,6 +1962,15 @@ PROXY_DECLARE(char *) ap_proxy_define_match_worker
}

(*worker)->s->is_name_matchable = 1;
+ if (pdollar) {
+ /* Prior to 2.4.4x, regex workers with dollar substitution
+ * were never matched and fell into the generic worker. To
+ * avoid dns/connection reuse compat issues, let's set
+ * disablereuse by default, which can still be overwritten
+ * by an explicit enablereuse=on.
+ */
+ (*worker)->s->disablereuse = 1;
+ }
return NULL;
}

--

Regards;
Yann.