Mercurial > hg > ngx_http_upstream_keepalive
view LICENSE @ 11:15530a464dba
Keepalive: don't cache invalid connections.
1. Remember failed status, since peer.free() may be called more than once.
It's called twice if peer fails - once from ngx_http_upstream_next() with
NGX_PEER_FAILED set, and then from ngx_http_upstream_finalize_request()
without.
2. We shouldn't cache connection unless we aren't expecting anything from
upstream. For memcached this means either 404 response or 200 response with
all body read (body may not be read e.g. when serving HEAD request).
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 13 Nov 2008 19:36:23 +0300 |
| parents | c1a2ef20a2a7 |
| children | f3e74fbd0f0b |
line wrap: on
line source
/* * Copyright (C) 2008 Maxim Dounin * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */