Haproxy : Les ACLs

ACL	Description
`if { path_beg /api/ }`	Route API requests.
`if { path_end .jpg .png }`	Route requests for images.
`if { hdr(host) -m dom example.local }`	Routes requests for the domain example.local.
`if { src 127.0.0.1/8 }`	Route requests originating from the given IP address range.
`if { method POST PUT }`	Route POST and PUT requests.
`if { url_param(region) europe }`	Route requests that have a URL parameter named region that is set to europe.

frontend www
  bind :80
  acl images_url path -i -m beg /images/

In this example:

The name assigned to the ACL is images_url.
The path argument returns the URL path that the client requested. Function like path are called fetch methods.
The -i flag performs a case-insensitive match of the requested URL path.
The -m beg flag means that the match type is begins with.
Note that an ACL on its own performs no action. Later, you will see how to pair it with an action.

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