I'm looking at setting up a Redis cache to speed up a Ruby on Rails application deployed with nginx. I want nginx to send a 304 Not Modified either based on a timestamp in the Redis db (e.g. last modified), or based on the existence of a key. The only thing I found so far is how to cache full pages in Redis, like the following example from the HttpRedis module:
server {
location / {
set $redis_key $uri;
redis_pass name:6379;
default_type text/html;
error_page 404 = /fallback;
}
location = /fallback {
proxy_pass backend;
}
}
Does anyone know if this is possible? Or would you recommend another way to send 304 responses without going to the Rails stack?