How do extract path without variables in Akka Http?

Question

I wish to obtain path without variables, for example, having api/test/132/123 I would like to get api/test . What is the best way of doing it? Can I get this done by using path directives - pathPrefix ? So far I can image something like this, eg, pass variables and remove them from string.

class UriSpec extends WordSpecLike with Matchers with ScalatestRouteTest {

  "Uri" should {

    "remain without identifiers" in new Scope {
      Get("/api/test/132/123") ~> testRoute ~> check {
        status should be(OK)
        responseAs[String] should be("/api/test")
      }
    }
  }

  private trait Scope extends Directives {

    def testRoute: Route =
      path("api" / "test" / LongNumber / LongNumber) { (n1, n2) =>
        extractMatchedPath { path =>
          complete(OK -> path.toString.replace(s"/$n1", "").replace(s"/$n2", ""))
        }
      }
  }
}

Thank you for your help. Sorry, I didn't managed to figure out how to use existing directives, nor find existing solution.

Answer 1

Your idea to use pathPrefix was along the right lines. You can use that to deal with the base path and then have a separate level to deal with the variables, extracting out the current matched path in between:

      def testRoute: Route =
         pathPrefix("api" / "test") {
            extractMatchedPath { basePath =>
               path(LongNumber / LongNumber) { (n1, n2) =>
                  complete(OK -> basePath.toString)
               }
            }
         }

That means you then have the base path separated out without the need to remove the variable parts.