path

path

Signature

def path[L](pm: PathMatcher[L]): Directive[L] 

Description

Matches the complete unmatched path of the RequestContext against the given PathMatcher, potentially extracts one or more values (depending on the type of the argument).

This directive filters incoming requests based on the part of their URI that hasn't been matched yet by other potentially existing pathPrefix directives on higher levels of the routing structure. Its one parameter is usually an expression evaluating to a PathMatcher instance (see also: The PathMatcher DSL).

As opposed to the rawPathPrefix or rawPathPrefixTest directives path automatically adds a leading slash to its PathMatcher argument, you therefore don't have to start your matching expression with an explicit slash.

The path directive attempts to match the complete remaining path, not just a prefix. If you only want to match a path prefix and then delegate further filtering to a lower level in your routing structure use the pathPrefix directive instead. As a consequence it doesn't make sense to nest a path or pathPrefix directive underneath another path directive, as there is no way that they will ever match (since the unmatched path underneath a path directive will always be empty).

Depending on the type of its PathMatcher argument the path directive extracts zero or more values from the URI. If the match fails the request is rejected with an empty rejection set.

Example

val route =
  path("foo") {
    complete("/foo")
  } ~
    path("foo" / "bar") {
      complete("/foo/bar")
    } ~
    pathPrefix("ball") {
      pathEnd {
        complete("/ball")
      } ~
        path(IntNumber) { int =>
          complete(if (int % 2 == 0) "even ball" else "odd ball")
        }
    }

// tests:
Get("/") ~> route ~> check {
  handled shouldEqual false
}

Get("/foo") ~> route ~> check {
  responseAs[String] shouldEqual "/foo"
}

Get("/foo/bar") ~> route ~> check {
  responseAs[String] shouldEqual "/foo/bar"
}

Get("/ball/1337") ~> route ~> check {
  responseAs[String] shouldEqual "odd ball"
}

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