Recursive find of a value in a Cache-Control HTTP header value string

CacheControlHeaderFinder.scala

def find(key: String, in: String): scala.util.Try[Int] = {
  scala.util.Try {
    def findValue(items: Array[String]): String = {
      val item = items.head
      if (item.contains(key)) { item.split("=").last }
      else { findValue(items.drop(1)) }
    }
    findValue(in.split(", ")).toInt
  }
}

// NB: This returns 300 for "max-a" and the first value of 300 for "max"
val max = find("max-age", "max-age=300, s-maxage=300, stale-while-revalidate=30") match {
  case scala.util.Success(value) => value
  case scala.util.Failure(ex) => 0
}