proper https interception

[Brendan Kearney]

i have iptables configured to redirect outbound HTTP to HAProxy, and 
then load balance to a couple of squid instances.  the below works well:

backend tproxy
        acl https ssl_fc
        http-request set-uri http://%[req.hdr(Host)]%[path]?%[query] 
unless https
        ...
i have tried to perform HTTPS interception using the below, in addition 
to the redirect of HTTPS traffic to the HAProxy VIP:

        http-request set-method CONNECT if https
        http-request set-uri https://%[req.hdr(Host)]%[path]?%[query] 
if https

this does not seem to work as expected.  where can i find more info on 
performing HTTPS interception, for transparent proxying?  any help would 
be appreciated.

thanks,

brendan