The syntax you have there should work without modification; A10's language is, how can I put it, eerily similar to iRules.

I would strongly advise you (and anyone else using HTTP::uri) to use [HTTP::uri -normalized], though, to avoid an attacker being able to evade your iRule logic by encoding, escaping or inserting path traversal characters: https://clouddocs.f5.com/api/irules/HTTP__uri.html

Hope below example can help you:

if you match "aol" traffic is sent to aol_pool otherwise is sent to the default pool associated to the VS.

when HTTP_REQUEST {
  # case sensitive
  if { [HTTP::uri] contains "aol" } {
     pool aol_pool
  }

}

In below cases we can the default pool in the code.

when HTTP_REQUEST {
  # case sensitive
  if { [HTTP::uri] contains "aol" } {
     pool aol_pool
  } else {
     pool all_pool
  }

  # case insensitive
  if { [string tolower [HTTP::uri]] contains "aol" } {
     pool aol_pool
  } else {
     pool all_pool
  }
}

References:

https://clouddocs.f5.com/api/irules/contains.html

https://clouddocs.f5.com/api/irules/HTTP__uri.html