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AdminService.scala
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Wed, Jul 17, 13:58

AdminService.scala
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package net.shrine.admin
import akka.actor.{ActorSystem, Actor}
import akka.event.Logging
import net.shrine.authentication.UserAuthenticator
import net.shrine.authorization.steward.OutboundUser
import net.shrine.i2b2.protocol.pm.User
import shapeless.HNil
import spray.http.{HttpResponse, HttpRequest, StatusCodes}
import spray.httpx.Json4sSupport
import spray.routing.directives.LogEntry
import spray.routing.{AuthenticationFailedRejection, Rejected, RouteConcatenation, Directive0, Route, HttpService}
import org.json4s.{DefaultFormats, Formats}
import scala.concurrent.ExecutionContext.Implicits.global
import net.shrine.admin.proxyto.ProxyDirectives.{proxyTo,proxyToUnmatchedPath}
// we don't implement our route structure directly in the service actor because
// we want to be able to test it independently, without having to spin up an actor
class AdminServiceActor extends Actor with AdminService {
// the HttpService trait defines only one abstract member, which
// connects the services environment to the enclosing actor or test
def actorRefFactory = context
// this actor only runs our route, but you could add
// other things here, like request stream processing
// or timeout handling
def receive = runRoute(route)
}
// this trait defines our service behavior independently from the service actor
trait AdminService extends HttpService with Json4sSupport {
implicit def json4sFormats: Formats = DefaultFormats
val userAuthenticator = UserAuthenticator(AdminConfigSource.config)
//don't need to do anything special for unauthorized users, but they do need access to a static form.
lazy val route:Route = logRequestResponse(logEntryForRequestResponse _) { //logging is controlled by Akka's config, slf4j, and log4j config
gruntWatchCorsSupport{
staticResources ~ makeTrouble ~ about ~ authenticatedInBrowser
}
}
// logs just the request method, uri and response at info level
def logEntryForRequestResponse(req: HttpRequest): Any => Option[LogEntry] = {
case res: HttpResponse => {
Some(LogEntry(s"\n Request: $req \n Response: $res", Logging.InfoLevel))
}
case _ => None // other kind of responses
}
//pathPrefixTest shields the QEP code from the redirect.
def authenticatedInBrowser: Route = pathPrefixTest("user"|"admin") {
reportIfFailedToAuthenticate {
authenticate(userAuthenticator.basicUserAuthenticator) { user =>
pathPrefix("user") {userRoute(user)} ~
pathPrefix("admin") {adminRoute(user)}
}
}
}
val reportIfFailedToAuthenticate = routeRouteResponse {
case Rejected(List(AuthenticationFailedRejection(_,_))) =>
complete("AuthenticationFailed")
}
def makeTrouble = pathPrefix("makeTrouble") {
complete(throw new IllegalStateException("fake trouble"))
}
lazy val staticResources = pathPrefix("client"){
getFromResourceDirectory("client")
} ~ pathEnd {
redirect("shrine-admin/client/index.html", StatusCodes.PermanentRedirect) //todo pick up the top of the url from context instead of hard-coded "admin"
} ~ path( "index.html" ) {
redirect("client/index.html", StatusCodes.PermanentRedirect)
} ~ pathSingleSlash {
redirect("client/index.html", StatusCodes.PermanentRedirect)
}
lazy val about = pathPrefix("about") {
complete("Nothing here yet") //todo
}
def userRoute(user:User):Route = get {
pathPrefix("whoami") {
complete(OutboundUser.createFromUser(user))
}
}
//todo is this an admin? Does it matter?
def adminRoute(user:User):Route = get {
pathPrefix("happy") {
val happyBaseUrl = AdminConfigSource.config.getString("shrine.admin.happyBaseUrl")
implicit val system = ActorSystem("sprayServer")
proxyToUnmatchedPath(happyBaseUrl)
}
}
}
//adapted from https://gist.github.com/joseraya/176821d856b43b1cfe19
object gruntWatchCorsSupport extends Directive0 with RouteConcatenation {
import spray.http.HttpHeaders.{`Access-Control-Allow-Methods`, `Access-Control-Max-Age`, `Access-Control-Allow-Headers`,`Access-Control-Allow-Origin`}
import spray.routing.directives.RespondWithDirectives.respondWithHeaders
import spray.routing.directives.MethodDirectives.options
import spray.routing.directives.RouteDirectives.complete
import spray.http.HttpMethods.{OPTIONS,GET,POST}
import spray.http.AllOrigins
private val allowOriginHeader = `Access-Control-Allow-Origin`(AllOrigins)
private val optionsCorsHeaders = List(
`Access-Control-Allow-Headers`("Origin, X-Requested-With, Content-Type, Accept, Accept-Encoding, Accept-Language, Host, Referer, User-Agent, Authorization"),
`Access-Control-Max-Age`(1728000)) //20 days
val gruntWatch:Boolean = AdminConfigSource.config.getBoolean("shrine.admin.gruntWatch")
override def happly(f: (HNil) => Route): Route = {
if(gruntWatch) {
options {
respondWithHeaders(`Access-Control-Allow-Methods`(OPTIONS, GET, POST) :: allowOriginHeader :: optionsCorsHeaders){
complete(StatusCodes.OK)
}
} ~ f(HNil)
}
else f(HNil)
}
}

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