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shrine-medco/commons/auth/src/main/scala/net/shrine/authorization/StewardQueryAuthorizationService.scala
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StewardQueryAuthorizationService.scala
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package net.shrine.authorization
import java.net.URL
import javax.net.ssl.{KeyManager, X509TrustManager, SSLContext}
import java.security.cert.X509Certificate
import akka.io.IO
import net.shrine.authorization.AuthorizationResult.{NotAuthorized, Authorized}
import net.shrine.authorization.steward.{ResearchersTopics, InboundShrineQuery}
import net.shrine.log.Loggable
import net.shrine.protocol.{ApprovedTopic, RunQueryRequest, ReadApprovedQueryTopicsResponse, ErrorResponse, ReadApprovedQueryTopicsRequest}
import org.json4s.native.JsonMethods.parse
import org.json4s.{DefaultFormats, Formats}
import akka.actor.ActorSystem
import akka.util.Timeout
import akka.pattern.ask
import spray.can.Http
import spray.can.Http.{HostConnectorInfo, HostConnectorSetup}
import spray.http.{HttpResponse, HttpRequest, BasicHttpCredentials}
import spray.http.StatusCodes.{Unauthorized, OK, UnavailableForLegalReasons}
import spray.httpx.TransformerPipelineSupport.WithTransformation
import spray.httpx.Json4sSupport
import spray.client.pipelining.{addCredentials,sendReceive,Post,Get}
import spray.io.{SSLContextProvider, PipelineContext, ClientSSLEngineProvider}
import scala.concurrent.duration.{Duration, FiniteDuration, DurationInt}
import scala.concurrent.{Await, Future}
import scala.language.postfixOps
/**
* A QueryAuthorizationService that talks to the standard data steward application to learn about topics (intents) and check that a
* shrine query can be run
*
* @author david
* @since 4/2/15
*/
final case class StewardQueryAuthorizationService(qepUserName:String,
qepPassword:String,
stewardBaseUrl:URL,
defaultTimeout:FiniteDuration = 10 seconds) extends QueryAuthorizationService with Loggable with Json4sSupport {
import system.dispatcher // execution context for futures
implicit val system = ActorSystem()
implicit val timeout:Timeout = Timeout.durationToTimeout(defaultTimeout)//10 seconds
implicit def json4sFormats: Formats = DefaultFormats
val qepCredentials = BasicHttpCredentials(qepUserName,qepPassword)
def sendHttpRequest(httpRequest: HttpRequest):Future[HttpResponse] = {
// Place a special SSLContext in scope here to be used by HttpClient.
// It trusts all server certificates.
implicit def trustfulSslContext: SSLContext = {
object BlindFaithX509TrustManager extends X509TrustManager {
def checkClientTrusted(chain: Array[X509Certificate], authType: String) = (info(s"Client asked BlindFaithX509TrustManager to check $chain for $authType"))
def checkServerTrusted(chain: Array[X509Certificate], authType: String) = (info(s"Server asked BlindFaithX509TrustManager to check $chain for $authType"))
def getAcceptedIssuers = Array[X509Certificate]()
}
val context = SSLContext.getInstance("TLS")
context.init(Array[KeyManager](), Array(BlindFaithX509TrustManager), null)
context
}
implicit def trustfulSslContextProvider: SSLContextProvider = {
SSLContextProvider.forContext(trustfulSslContext)
}
class CustomClientSSLEngineProvider extends ClientSSLEngineProvider {
def apply(pc: PipelineContext) = ClientSSLEngineProvider.default(trustfulSslContextProvider).apply(pc)
}
implicit def sslEngineProvider: ClientSSLEngineProvider = new CustomClientSSLEngineProvider
val requestWithCredentials = httpRequest ~> addCredentials(qepCredentials)
val responseFuture: Future[HttpResponse] = for {
HostConnectorInfo(hostConnector, _) <- {
val hostConnectorSetup = new HostConnectorSetup(httpRequest.uri.authority.host.address,
httpRequest.uri.authority.port,
sslEncryption = httpRequest.uri.scheme=="https")(
sslEngineProvider = sslEngineProvider)
IO(Http) ask hostConnectorSetup
}
response <- sendReceive(hostConnector).apply(requestWithCredentials)
_ <- hostConnector ask Http.CloseAll
} yield response
responseFuture
}
/* todo to recycle connections with http://spray.io/documentation/1.2.3/spray-client/ if needed
def sendHttpRequest(httpRequest: HttpRequest):Future[HttpResponse] = {
import akka.io.IO
import akka.pattern.ask
import spray.can.Http
val requestWithCredentials = httpRequest ~> addCredentials(qepCredentials)
//todo failures via onFailure callbacks
for{
sendR:SendReceive <- connectorSource
response:HttpResponse <- sendR(requestWithCredentials)
} yield response
}
val connectorSource: Future[SendReceive] = //Future[HttpRequest => Future[HttpResponse]]
for (
//keep asking for a connector until you get one
//todo correct URL
// Http.HostConnectorInfo(connector, _) <- IO(Http) ? Http.HostConnectorSetup("www.spray.io", port = 8080)
Http.HostConnectorInfo(connector, _) <- IO(Http) ? Http.HostConnectorSetup("localhost", port = 6060)
) yield sendReceive(connector)
*/
def sendAndReceive(httpRequest: HttpRequest,timeout:Duration = defaultTimeout):HttpResponse = {
info("StewardQueryAuthorizationService will request "+httpRequest.uri) //todo someday log request and response
val responseFuture = sendHttpRequest(httpRequest)
val response:HttpResponse = Await.result(responseFuture,timeout)
info("StewardQueryAuthorizationService received response with status "+response.status)
response
}
//Contact a data steward and either return an Authorized or a NotAuthorized or throw an exception
override def authorizeRunQueryRequest(runQueryRequest: RunQueryRequest): AuthorizationResult = {
debug(s"authorizeRunQueryRequest started for ${runQueryRequest.queryDefinition.name}")
val interpreted = runQueryRequest.topicId.fold(
authorizeRunQueryRequestNoTopic(runQueryRequest)
)(
authorizeRunQueryRequestForTopic(runQueryRequest,_)
)
debug(s"authorizeRunQueryRequest completed with $interpreted) for ${runQueryRequest.queryDefinition.name}")
interpreted
}
def authorizeRunQueryRequestNoTopic(runQueryRequest: RunQueryRequest): AuthorizationResult = {
val userName = runQueryRequest.authn.username
val queryId = runQueryRequest.queryDefinition.name
//xml's .text returns something that looks like xquery with backwards slashes. toString() returns xml.
val queryForJson = InboundShrineQuery(runQueryRequest.networkQueryId,queryId,runQueryRequest.queryDefinition.toXml.toString())
val request = Post(s"$stewardBaseUrl/steward/qep/requestQueryAccess/user/$userName", queryForJson)
val response:HttpResponse = sendAndReceive(request,runQueryRequest.waitTime)
interpretAuthorizeRunQueryResponse(response)
}
def authorizeRunQueryRequestForTopic(runQueryRequest: RunQueryRequest,topicIdString:String): AuthorizationResult = {
val userName = runQueryRequest.authn.username
val queryId = runQueryRequest.queryDefinition.name
//xml's .text returns something that looks like xquery with backwards slashes. toString() returns xml.
val queryForJson = InboundShrineQuery(runQueryRequest.networkQueryId,queryId,runQueryRequest.queryDefinition.toXml.toString())
val request = Post(s"$stewardBaseUrl/steward/qep/requestQueryAccess/user/$userName/topic/$topicIdString", queryForJson)
val response:HttpResponse = sendAndReceive(request,runQueryRequest.waitTime)
interpretAuthorizeRunQueryResponse(response)
}
/** Interpret the response from the steward app. Primarily here for testing. */
def interpretAuthorizeRunQueryResponse(response:HttpResponse):AuthorizationResult = {
response.status match {
case OK => Authorized
case UnavailableForLegalReasons => NotAuthorized(response.entity.asString)
case Unauthorized => throw new AuthorizationException(s"steward rejected qep's login credentials. $response")
case _ => throw new AuthorizationException(s"QueryAuthorizationService detected a problem: $response")
}
}
//Either read the approved topics from a data steward or have an error response.
override def readApprovedEntries(readTopicsRequest: ReadApprovedQueryTopicsRequest): Either[ErrorResponse, ReadApprovedQueryTopicsResponse] = {
val userName = readTopicsRequest.authn.username
val request = Get(s"$stewardBaseUrl/steward/qep/approvedTopics/user/$userName")
val response:HttpResponse = sendAndReceive(request,readTopicsRequest.waitTime)
if(response.status == OK) {
val topicsJson = new String(response.entity.data.toByteArray)
val topicsFromSteward: ResearchersTopics = parse(topicsJson).extract[ResearchersTopics]
val topics: Seq[ApprovedTopic] = topicsFromSteward.topics.map(topic => ApprovedTopic(topic.id, topic.name))
Right(ReadApprovedQueryTopicsResponse(topics))
}
else Left(ErrorResponse(s"Response status is ${response.status}, not OK. Response is "+response))
}
override def toString() = {
super.toString().replaceAll(qepPassword,"REDACTED")
}
}
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