A HAProxy SPOP library tour
I learned about HAProxy SPOP and its extreme versatility while getting introduced to the browser validation at one of my old jobs. There are multiple ways to filter out bad clients, one of the simplest ones are small websites that are solving a proof-of-work challenge. Cloudflare is a perfect example of such a client validation that nearly everyone have seen at least once. To allow implementation of such a system, the loadbalancer needs to conditionally redirect clients based on a secret the browser provides, mostly based on a cookie....