ping

.gitignore

@@ -0,0 +1,3 @@
+logs/
+target/
+RUNNING_PID

app/SiteClientActor.scala

@@ -0,0 +1,22 @@
+package lichess.ws
+
+import akka.actor._
+import play.api.libs.json._
+
+final class SiteClientActor(out: ActorRef) extends Actor {
+
+  def receive = {
+    case Ping => send(Pong)
+    case msg: JsValue => send(JsString("Got: " + msg))
+  }
+
+  val Ping = JsNull
+  val Pong = JsNumber(0)
+
+  def send(msg: JsValue) = out ! msg
+}
+
+object SiteClientActor {
+
+  def props(out: ActorRef) = Props(new SiteClientActor(out))
+}

app/controllers/SocketController.scala

@@ -0,0 +1,31 @@
+package controllers
+
+import javax.inject._
+
+import akka.actor._
+import akka.event.Logging
+import akka.stream.Materializer
+import play.api.libs.streams.ActorFlow
+import play.api.Logger
+import play.api.mvc._
+import play.api.libs.json._
+
+import scala.concurrent.{ ExecutionContext, Future }
+
+import lichess.ws._
+
+@Singleton
+class SocketController @Inject() (val controllerComponents: ControllerComponents)(implicit
+    actorSystem: ActorSystem,
+    mat: Materializer,
+    executionContext: ExecutionContext
+) extends BaseController {
+
+  private type WSMessage = JsValue
+  private val logger = Logger(getClass)
+
+  def site(): WebSocket =
+    WebSocket.accept[WSMessage, WSMessage] { req =>
+      ActorFlow actorRef { out => SiteClientActor.props(out) }
+    }
+}

build.sbt

@@ -0,0 +1,17 @@
+name := "lila-ws"
+
+version := "1.0-SNAPSHOT"
+
+lazy val root = (project in file(".")).enablePlugins(PlayScala).disablePlugins(PlayFilters)
+
+/* val akkaVersion = "2.6.0-M2" */
+
+scalaVersion := "2.13.0"
+
+libraryDependencies += guice
+
+scalacOptions ++= Seq(
+  "-feature",
+  "-deprecation",
+  "-Xfatal-warnings"
+)

conf/application.conf

@@ -0,0 +1,23 @@
+# Uncomment this for the most verbose Akka debugging:
+akka {
+  loggers = ["akka.event.slf4j.Slf4jLogger"]
+  loglevel = "DEBUG"
+  logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"
+
+  actor {
+    debug {
+      #receive = on
+      #autoreceive = on
+      #lifecycle = on
+    }
+  }
+}
+
+
+play.filters.headers.contentSecurityPolicy = null
+
+# https://www.playframework.com/documentation/latest/AllowedHostsFilter
+# Allow requests to localhost:9000.
+play.filters.hosts {
+  allowed = ["localhost:9000"]
+}

conf/logback.xml

@@ -0,0 +1,33 @@
+<configuration>
+
+    <conversionRule conversionWord="coloredLevel" converterClass="play.api.libs.logback.ColoredLevel"/>
+
+    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+        <file>logs/application.log</file>
+        <encoder>
+            <pattern>%date [%level] from %logger in %thread - %message%n%xException</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%coloredLevel %logger{15} - [%marker] %message%n%xException{10}</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="play" level="INFO"/>
+
+    <!-- actors logging -->
+    <logger name="akka" level="DEBUG"/>
+
+    <logger name="actors" level="DEBUG"/>
+
+    <!-- controllers -->
+    <logger name="controllers" level="DEBUG"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+        <appender-ref ref="FILE"/>
+    </root>
+
+</configuration>

conf/routes

@@ -0,0 +1,5 @@
+# Routes
+# This file defines all application routes (Higher priority routes first)
+# ~~~~
+
+GET     /socket/v4                           controllers.SocketController.site

project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.2.8

project/plugins.sbt

@@ -0,0 +1,2 @@
+// Use the Play sbt plugin for Play projects
+addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.3")