Example configuration for wordpress under HAProxy

haproxy.wordpress-over-https.cfg

## Frontend

frontend http-in
    bind 0.0.0.0:80 

    reqadd X-Forwarded-Proto:http
    
    acl host-is-foo hdr(host) -i foo.example.com www.foo.example.com 

    acl path-content          path_beg /content
    acl path-content-login    path /content/wp-login.php
    acl path-content-admin    path_beg /content/wp-admin
   
    redirect scheme https if host-is-foo path-content-login
    redirect scheme https if host-is-foo path-content-admin
    
    use_backend backend-wordpress if host-is-foo path-content
    
    # more ... 
    
frontend https-in
    bind 0.0.0.0:443 ssl crt /etc/haproxy/cert.pem
    
    reqadd X-Forwarded-Proto:https
    
    acl host-is-foo hdr(host) -i foo.example.com www.foo.example.com 
    
    acl path-content          path_beg /content
    acl path-content-login    path /content/wp-login.php
    acl path-content-admin    path_beg /content/wp-admin
    acl path-content-inc      path_beg /content/wp-includes /content/wp-content/plugins /content/wp-content/themes

    redirect scheme http if host-is-foo path-content !path-content-login !path-content-admin !path-content-inc

    use_backend backend-wordpress if host-is-foo path-content
  
    # more ... 

## Backend

backend backend-wordpress
    option forwardfor 
    server node1 wp-1.local:80 check weight 1