validate
Checks an arbitrary condition and passes control to the inner route if it returns true
. Otherwise, rejects the
request with a ValidationRejection
containing the given error message.
Signature
def validate(check: ⇒ Boolean, errorMsg: String): Directive0
Example
val route =
requestUri { uri =>
validate(uri.path.toString.size < 5, s"Path too long: '${uri.path.toString}'") {
complete(s"Full URI: $uri")
}
}
Get("/234") ~> route ~> check {
responseAs[String] === "Full URI: http://example.com/234"
}
Get("/abcdefghijkl") ~> route ~> check {
rejection === ValidationRejection("Path too long: '/abcdefghijkl'", None)
}