haproxy: share port between HTTPS and XMPP - xmpp

Question

Followed the myriads of tutorials and still no go. I don't need haproxy to handle SSL as I'm passing https directly to the nginx SSL port and XMPP also has its own encryption.
Here is what I have (MY.DOMAIN is valid for the nginx SSL cert). Everything always falls through to XMPP. I'm also open to reversing the approach - does anyone have a reliable way to detect XMPP (with SSL)?
global
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
defaults
mode http
log global
option httplog
option dontlognull
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 120s
timeout queue 1m
timeout connect 10s
timeout client 1440m # Modified
timeout server 1440m # Modified
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
frontend main
mode tcp
bind :443
tcp-request inspect-delay 5s
#Neither of these work:
#use_backend www-ssl if { req.ssl_hello_type 1 }
use_backend www-ssl if { req.ssl_sni -i MY.DOMAIN }
default_backend xmpp
option tcplog
log global
backend xmpp
mode tcp
option tcplog
server app1 127.0.0.1:5222
backend www-ssl
mode tcp
server www-ssl 127.0.0.1:1443

Answer 1

The above configuration actually is working. I had some redirect on the backend that confused me.
I'm not 100% sure that it's working all the time (for example, curl is getting XMPP and I'm not sure what's so different about curl's SSL), but at least for Chrome requests the HTTPS detection is working.
UPDATE: adding this to frontend makes it work for curl and browsers:
acl content_present req_len gt 0
tcp-request content accept if content_present