I hope you will forgive my asking for help on what I assume is a fairly
obvious error of some sort – but it’s one I’m afraid I can’t figure
out.
Basically, we have a cherrypy back end server that will resolve layer
names
to IP address, handling requests of the form:
/resolve?layer=test
or
/resolve?layer=es_layer_23
The back end server sets a memcache key/value pair so that the next time
around, nginx can avoid the “@cache_miss” proxy pass.
For the most part, all works well – if I request the name of a key in
the
memcached, (“test”, for example) – it gets returned. Likewise, if I
request a key NOT in memcached, the request gets sent to my server.
However, there are a couple of classes of layers that can be handled
generically: ANY layer starting with “es_” or “api_” will go to the
same
host: So no need to clutter memcached, right? Just convert the key so
that
it is identical for all such requests…
When I attempt to do so using the code fragment below, however, I get
what I
believe is unusual behavior – requests for anything starting with “es_”
or
“api_” return nothing – no HTTP headers, no nothing.
Any thoughts on why?
Thanks,
–Tom
location /resolve {
default_type text/html;
set $memcached_key "api:/resolve?$args";
if ($args ~ "layer=es_") {
set $memcached_key "api:/resolve?layer=es_";
}
if ($args ~ "layer=api_") {
set $memcached_key "api:/resolve?layer=api_";
}
memcached_pass localhost:11211;
error_page 404 = @cache_miss;
}