Deferred body parsing

core/play-integration-test/src/it/java/play/it/http/parsingdeferred/Attrs.java

@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) from 2022 The Play Framework Contributors <https://github.com/playframework>, 2011-2021 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package play.it.http.parsingdeferred;
+
+import play.libs.typedmap.TypedKey;
+
+class Attrs {
+  public static final TypedKey<String> REQUEST_FLOW = TypedKey.create("request-flow");
+}

core/play-integration-test/src/it/java/play/it/http/parsingdeferred/SimpleActionAnnotation.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) from 2022 The Play Framework Contributors <https://github.com/playframework>, 2011-2021 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package play.it.http.parsingdeferred;
+
+import static play.it.http.parsingdeferred.DeferredBodyParsingSpec.buildActionCompositionMessage;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.concurrent.CompletionStage;
+import play.mvc.Action;
+import play.mvc.Http;
+import play.mvc.Result;
+import play.mvc.With;
+
+@With(SimpleActionAnnotationAction.class)
+@Target({ElementType.TYPE, ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface SimpleActionAnnotation {}
+
+class SimpleActionAnnotationAction extends Action<SimpleActionAnnotation> {
+  @Override
+  public CompletionStage<Result> call(Http.Request req) {
+    return delegate.call(
+        req.addAttr(Attrs.REQUEST_FLOW, buildActionCompositionMessage(req.asScala())));
+  }
+}

core/play-integration-test/src/it/scala/play/it/http/parsingdeferred/DeferredBodyParsingSpec.scala

@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) from 2022 The Play Framework Contributors <https://github.com/playframework>, 2011-2021 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package play.it.http.parsingdeferred
+
+import java.util.concurrent.CompletableFuture
+
+import scala.concurrent.ExecutionContext
+import scala.concurrent.Future
+
+import akka.actor.ActorSystem
+import akka.stream.javadsl.{ Sink => JSink }
+import akka.stream.scaladsl.Sink
+import akka.stream.Materializer
+import akka.util.ByteString
+import com.typesafe.config.ConfigFactory
+import org.specs2.specification.core.Fragment
+import org.specs2.specification.AfterAll
+import org.specs2.specification.AfterEach
+import org.specs2.specification.BeforeAll
+import play.api.inject.guice.GuiceApplicationBuilder
+import play.api.libs.streams.Accumulator
+import play.api.libs.ws.DefaultBodyReadables.readableAsString
+import play.api.libs.ws.DefaultBodyWritables.writeableOf_String
+import play.api.libs.ws.WSResponse
+import play.api.mvc._
+import play.api.mvc.request.RequestAttrKey.DeferredBodyParsing
+import play.api.mvc.Handler.Stage
+import play.api.routing.HandlerDef
+import play.api.routing.Router
+import play.api.test.Helpers
+import play.api.test.PlaySpecification
+import play.api.test.WsTestClient
+import play.api.Application
+import play.it.http.JAction
+import play.it.http.MockController
+import play.it.AkkaHttpIntegrationSpecification
+import play.it.NettyIntegrationSpecification
+import play.it.ServerIntegrationSpecification
+import play.libs.streams.{ Accumulator => JAccumulator }
+import play.libs.F
+import play.mvc.{ BodyParser => JBodyParser }
+import play.mvc.{ Result => JResult }
+import play.mvc.Http
+import play.mvc.Http.{ Request => JRequest }
+import play.mvc.Results
+
+class AkkaHttpServerDeferredBodyParsingSpec extends DeferredBodyParsingSpec with AkkaHttpIntegrationSpecification {
+  override def serverBackend(): String = "akka-http"
+}
+
+class NettyServerDeferredBodyParsingSpec extends DeferredBodyParsingSpec with NettyIntegrationSpecification {
+  override def serverBackend(): String = "netty"
+}
+
+object DeferredBodyParsingSpec {
+
+  // Not possible to put inside the trait, Guice complains:
+  // "Injecting into inner classes is not supported.  Please use a 'static' class (top-level or nested)..."
+  class SimpleJavaBodyParser extends JBodyParser[String] {
+    override def apply(request: Http.RequestHeader): JAccumulator[ByteString, F.Either[JResult, String]] =
+      JAccumulator.strict[ByteString, F.Either[JResult, String]](
+        bytesOpt =>
+          CompletableFuture.completedFuture(
+            F.Either.Right(
+              bytesOpt.map[String](bytes => buildParserDebugMessage(request.asScala(), bytes.utf8String)).orElse("")
+            )
+          ),
+        JSink
+          .fold[ByteString, ByteString](ByteString.empty, (state, bs) => state ++ bs)
+          .mapMaterializedValue(
+            _.thenApply(bytes => F.Either.Right(buildParserDebugMessage(request.asScala(), bytes.utf8String)))
+          )
+      )
+  }
+
+  // These are the values we are checking against
+  val notDeferredBodyContent =
+    "Action composition, body was parsed already: true, internal request attribute set: false | Body parsed: abc, request attribute set: false, internal request attribute set: false"
+  val deferredBodyContent =
+    "Action composition, body was parsed already: false, internal request attribute set: true | Body parsed: abc, request attribute set: true, internal request attribute set: false"
+
+  def buildParserDebugMessage(request: RequestHeader, parsedBody: String) =
+    s"Body parsed: $parsedBody, request attribute set: ${request.attrs.contains(Attrs.REQUEST_FLOW.asScala())}, internal request attribute set: ${request.attrs
+        .contains(DeferredBodyParsing)}"
+
+  def buildActionCompositionMessage(request: Request[_]) =
+    s"Action composition, body was parsed already: ${(request.body != null)}, internal request attribute set: ${request.attrs
+        .contains(DeferredBodyParsing)}"
+}
+
+trait DeferredBodyParsingSpec
+    extends PlaySpecification
+    with WsTestClient
+    with ServerIntegrationSpecification
+    with BeforeAll
+    with AfterAll
+    with AfterEach {
+
+  sequential
+
+  def serverBackend(): String
+
+  override def beforeAll(): Unit = {
+    // Let's set the server header for both backends, so we can test later if the correct server backend is used
+    System.setProperty("play.server.akka.server-header", "akka-http-server-backend")
+    System.setProperty("play.server.netty.server-header", "netty-server-backend")
+  }
+
+  override def afterAll(): Unit = {
+    System.clearProperty("play.server.akka.server-header")
+    System.clearProperty("play.server.netty.server-header")
+    ConfigFactory.invalidateCaches()
+  }
+
+  protected override def after: Any = {
+    System.clearProperty("play.server.deferBodyParsing")
+  }
+
+  // ### General
+
+  def makeGenericRequest[T](
+      handler: Application => Handler,
+      deferBodyParsing: Option[Boolean] = None,
+      routesModifiers: Seq[String] = Seq.empty
+  )(block: WSResponse => T): T = {
+    lazy val app: Application = GuiceApplicationBuilder()
+      .routes {
+        case _ =>
+          new Stage {
+            override def apply(requestHeader: RequestHeader): (RequestHeader, Handler) = (
+              requestHeader.addAttr(
+                Router.Attrs.HandlerDef,
+                HandlerDef(null, null, null, null, null, null, null, null, routesModifiers)
+              ),
+              handler(app)
+            )
+          }
+      }
+      .build()
+
+    deferBodyParsing.foreach(defer => System.setProperty("play.server.deferBodyParsing", defer.toString))
+    ConfigFactory.invalidateCaches()
+
+    runningWithPort(TestServer(testServerPort, app)) { implicit port =>
+      val response = await(wsUrl("/").post("abc"))
+      // Just make 100% sure we run all tests with both akka-http and netty server backend
+      response.header("server") must beSome(serverBackend() + "-server-backend")
+      block(response)
+    }
+  }
+
+  // ### Scala API
+
+  import DeferredBodyParsingSpec._
+
+  val system               = ActorSystem()
+  val mat                  = Materializer.matFromSystem(system)
+  val ec: ExecutionContext = system.dispatcher
+
+  val simpleScalaBodyParser: BodyParser[String] = BodyParser { request =>
+    Accumulator.strict[ByteString, Either[Result, String]](
+      bytesOpt =>
+        Future.successful(
+          Right(bytesOpt.map(bytes => buildParserDebugMessage(request, bytes.utf8String)).getOrElse(""))
+        ),
+      Sink
+        .fold[ByteString, ByteString](ByteString.empty)((state, bs) => state ++ bs)
+        .mapMaterializedValue(_.map(bytes => Right(buildParserDebugMessage(request, bytes.utf8String)))(ec))
+    )
+  }
+
+  class SimpleScalaAction(parser: BodyParser[String])(implicit ec: ExecutionContext) extends ActionBuilderImpl(parser) {
+    override def invokeBlock[A](req: Request[A], block: Request[A] => Future[Result]) =
+      BodyParser.parseBody(
+        parser,
+        req.addAttr(Attrs.REQUEST_FLOW.asScala(), buildActionCompositionMessage(req)),
+        block.asInstanceOf[Request[Any] => Future[Result]]
+      )
+  }
+
+  class ScalaMockController(simpleScalaAction: SimpleScalaAction, cc: ControllerComponents)
+      extends AbstractController(cc) {
+    def index = simpleScalaAction { (request: Request[String]) =>
+      Ok(request.attrs.get(Attrs.REQUEST_FLOW.asScala()).getOrElse("") + " | " + request.body)
+    }
+  }
+
+  val simpleScalaAction = new SimpleScalaAction(simpleScalaBodyParser)(ec)
+
+  def makeScalaRequest[T](deferBodyParsing: Option[Boolean] = None, routesModifiers: Seq[String] = Seq.empty)(
+      block: WSResponse => T
+  ): T =
+    makeGenericRequest(
+      _ => new ScalaMockController(simpleScalaAction, Helpers.stubControllerComponents()).index,
+      deferBodyParsing,
+      routesModifiers
+    )(block)
+
+  // ### Java API
+
+  private def jActionController() = {
+    new MockController {
+      @SimpleActionAnnotation
+      @JBodyParser.Of(classOf[SimpleJavaBodyParser])
+      override def action(request: JRequest): JResult =
+        Results.ok(request.attrs().get[String](Attrs.REQUEST_FLOW) + " | " + request.body().asText())
+    }
+  }
+
+  def makeJavaRequest[T](deferBodyParsing: Option[Boolean] = None, routesModifiers: Seq[String] = Seq.empty)(
+      block: WSResponse => T
+  ): T =
+    makeGenericRequest(JAction(_, jActionController()), deferBodyParsing, routesModifiers)(block)
+
+  // Finally tests
+
+  def makeTestRequest[T](
+      apiKey: String,
+      deferBodyParsing: Option[Boolean] = None,
+      routesModifiers: Seq[String] = Seq.empty
+  )(block: WSResponse => T): T =
+    if (apiKey == "Scala") {
+      makeScalaRequest(deferBodyParsing, routesModifiers)(block)
+    } else if (apiKey == "Java") {
+      makeJavaRequest(deferBodyParsing, routesModifiers)(block)
+    } else {
+      throw new RuntimeException("Don't make typos. It's either 'Scala' or 'Java'")
+    }
+
+  Fragment.foreach(Seq("Scala", "Java")) { apiKey =>
+    s"$apiKey API" should {
+      "by default not defer body parsing" in makeTestRequest(apiKey) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+      "defer body parsing when activated globally via config" in makeTestRequest(
+        apiKey,
+        deferBodyParsing = Some(true)
+      ) { response =>
+        response.body must beEqualTo(deferredBodyContent)
+      }
+      "not defer body parsing when explicitly deactivated globally via config" in makeTestRequest(
+        apiKey,
+        Some(false)
+      ) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+      "defer body parsing when deactivated globally but activated via route modifier" in makeTestRequest(
+        apiKey,
+        routesModifiers = Seq("deferBodyParsing")
+      ) { response =>
+        response.body must beEqualTo(deferredBodyContent)
+      }
+      "defer body parsing when deactivated globally but activated via case insensitive route modifier" in makeTestRequest(
+        apiKey,
+        routesModifiers = Seq("dEfErBOdyPaRSING")
+      ) { response =>
+        response.body must beEqualTo(deferredBodyContent)
+      }
+      "not defer body parsing when activated globally but deactivated via route modifier" in makeTestRequest(
+        apiKey,
+        Some(true),
+        routesModifiers = Seq("dontDeferBodyParsing")
+      ) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+      "not defer body parsing when activated globally but deactivated via case insensitive route modifier" in makeTestRequest(
+        apiKey,
+        Some(true),
+        routesModifiers = Seq("doNTDeFErBoDyPARSING")
+      ) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+      "not defer body parsing when activated globally and also via route modifier but deactivated via route modifier" in makeTestRequest(
+        apiKey,
+        Some(true),
+        routesModifiers = Seq("deferBodyParsing", "dontDeferBodyParsing")
+      ) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+      "not defer body parsing when deactivated globally and activated via route modifier but deactivated via route modifier" in makeTestRequest(
+        apiKey,
+        routesModifiers = Seq("deferBodyParsing", "dontDeferBodyParsing")
+      ) { response =>
+        response.body must beEqualTo(notDeferredBodyContent)
+      }
+    }
+  }
+}