> It is, regrettably, not an off-the-shelf proxy, since one of them required application-specific routing to a sticky host(s) depending on the contents of the H

> It is, regrettably, not an off-the-shelf proxy, since one of them required application-specific routing to a sticky host(s) depending on the contents of the HTTP request. Did haproxy not support the necessary ACLs for you to accomplish this? It might be possible in 1.6, which lets you process the HTTP request body in addition to the headers. http://blog.haproxy.com/2015/10/14/whats-new-in-haproxy-1-6/ http://blog.haproxy.com/2015/10/14/whats-new-in-haproxy-1-6/