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trait HttpRequest {
val host: String
val path: String
}
case class Get(host: String, path: String) extends HttpRequest
case class Post(host: String, path: String) extends HttpRequest
case class Delete(host: String, path: String) extends HttpRequest
case class HttpResponse(status: Int, body: String)
case class Server(route: PartialFunction[HttpRequest, HttpResponse]) {
def handle(request: HttpRequest): HttpResponse = {
if (route.isDefinedAt(request)) {
route(request)
} else {
HttpResponse(500, s"unknown request type $request")
}
}
}
object Example {
def main(args: Array[String]): Unit = {
//println(check(Complex(Number(3),Number(4))))
val route1: PartialFunction[HttpRequest, HttpResponse] = {
case Get(host, path) => HttpResponse(200, path)
case Post("localhost", path) =>
// upload a file
HttpResponse(200, "file uploaded")
case Post(_, path) =>
HttpResponse(403, "forbidden")
}
val route2: PartialFunction[HttpRequest, HttpResponse] = {
case Delete("localhost", _) => HttpResponse(200, "deleted")
}
val route = route1 orElse route2
val server: Server = Server(route)
val requests: List[HttpRequest] = List(
Post("localhost", "foo.txt"),
Get("localhost", "foo.txt"),
Delete("localhost","foo.txt"),
Get("localhost", "foo.txt")
)
val responses: List[HttpResponse] = requests.map(server.handle(_))
for (response <- responses) {
println(response)
}
}
}
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