HAProxy Enterprise Documentation 2.3r1

Inline ACLs

Although you can define an ACL on its own by using the acl directive, in which case it can be referenced on another line by name:

frontend www
   bind :80
   acl api_url path_beg /api/
   use_backend api_server if api_url

You can also declare the ACL inline by surrounding the expression with curly braces:

frontend www
   bind :80
   use_backend api_server if { path_beg /api/ }

Next up

Predefined ACLs