Refactor server API

demo/playground/src/jvmMain/kotlin/formServer.kt

@@ -2,6 +2,7 @@ package space.kscience.visionforge.examples
 
 import io.ktor.server.cio.CIO
 import io.ktor.server.engine.embeddedServer
+import io.ktor.server.http.content.resources
 import io.ktor.server.routing.routing
 import kotlinx.html.*
 import space.kscience.dataforge.context.Global
@@ -10,6 +11,7 @@ import space.kscience.visionforge.VisionManager
 import space.kscience.visionforge.html.VisionPage
 import space.kscience.visionforge.html.formFragment
 import space.kscience.visionforge.onPropertyChange
+import space.kscience.visionforge.server.EngineConnectorConfig
 import space.kscience.visionforge.server.close
 import space.kscience.visionforge.server.openInBrowser
 import space.kscience.visionforge.server.visionPage
@@ -17,10 +19,16 @@ import space.kscience.visionforge.server.visionPage
 fun main() {
     val visionManager = Global.fetch(VisionManager)
 
-    val server = embeddedServer(CIO, 7777, "localhost") {
+
+    val connector = EngineConnectorConfig("localhost", 7777)
+
+    val server = embeddedServer(CIO, connector.port, connector.host) {
 
         routing {
-            visionPage(visionManager, VisionPage.scriptHeader("js/visionforge-playground.js")) {
+            resources()
+        }
+
+        visionPage(connector, visionManager, VisionPage.scriptHeader("js/visionforge-playground.js")) {
             val form = formFragment("form") {
                 label {
                     htmlFor = "fname"
@@ -58,7 +66,7 @@ fun main() {
                 println(this)
             }
         }
-        }
+
     }.start(false)
 
     server.openInBrowser()

demo/sat-demo/src/main/kotlin/ru/mipt/npm/sat/satServer.kt

@@ -15,6 +15,7 @@ import space.kscience.dataforge.meta.Null
 import space.kscience.dataforge.names.Name
 import space.kscience.visionforge.Colors
 import space.kscience.visionforge.html.VisionPage
+import space.kscience.visionforge.server.EngineConnectorConfig
 import space.kscience.visionforge.server.close
 import space.kscience.visionforge.server.openInBrowser
 import space.kscience.visionforge.server.visionPage
@@ -36,21 +37,26 @@ fun main() {
             color.set(Colors.white)
         }
     }
+    val connector = EngineConnectorConfig("localhost", 7777)
 
-    val server = embeddedServer(CIO,7777, "localhost") {
+    val server = embeddedServer(CIO, connector.port, connector.host) {
         routing {
-
             static {
                 resources()
             }
+        }
 
-            visionPage(solids.visionManager, VisionPage.threeJsHeader, VisionPage.styleSheetHeader("css/styles.css")) {
+        visionPage(
+            connector,
+            solids.visionManager, VisionPage.threeJsHeader,
+            VisionPage.styleSheetHeader("css/styles.css")
+        ) {
             div("flex-column") {
                 h1 { +"Satellite detector demo" }
                 vision { sat }
             }
         }
-        }
+
     }.start(false)
 
     server.openInBrowser()

jupyter/src/jvmMain/kotlin/VFForNotebook.kt

@@ -4,9 +4,8 @@ import io.ktor.http.URLProtocol
 import io.ktor.server.application.install
 import io.ktor.server.cio.CIO
 import io.ktor.server.engine.ApplicationEngine
+import io.ktor.server.engine.EngineConnectorConfig
 import io.ktor.server.engine.embeddedServer
-import io.ktor.server.routing.Routing
-import io.ktor.server.routing.route
 import io.ktor.server.util.url
 import io.ktor.server.websocket.WebSockets
 import kotlinx.coroutines.CoroutineScope
@@ -26,8 +25,8 @@ import space.kscience.visionforge.html.HtmlFormFragment
 import space.kscience.visionforge.html.HtmlVisionFragment
 import space.kscience.visionforge.html.VisionCollector
 import space.kscience.visionforge.html.visionFragment
-import space.kscience.visionforge.server.VisionRouteConfiguration
+import space.kscience.visionforge.server.EngineConnectorConfig
-import space.kscience.visionforge.server.require
+import space.kscience.visionforge.server.VisionRoute
 import space.kscience.visionforge.server.serveVisionData
 import space.kscience.visionforge.visionManager
 import kotlin.coroutines.CoroutineContext
@@ -48,8 +47,6 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
 
     public val visionManager: VisionManager = context.visionManager
 
-    private val configuration = VisionRouteConfiguration(visionManager)
-
     private var counter = 0
 
     private var engine: ApplicationEngine? = null
@@ -68,7 +65,7 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
 
     public fun startServer(
         host: String = context.properties["visionforge.host"].string ?: "localhost",
-        port: Int = context.properties["visionforge.port"].int ?: VisionRouteConfiguration.DEFAULT_PORT,
+        port: Int = context.properties["visionforge.port"].int ?: VisionRoute.DEFAULT_PORT,
     ): MimeTypedResult = html {
         if (engine != null) {
             p {
@@ -77,6 +74,8 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
             }
         }
 
+        val connector: EngineConnectorConfig = EngineConnectorConfig(host, port)
+
         engine?.stop(1000, 2000)
         engine = context.embeddedServer(CIO, port, host) {
             install(WebSockets)
@@ -111,7 +110,7 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
                 val collector: VisionCollector = mutableMapOf()
 
                 val url = engine.environment.connectors.first().let {
-                    url{
+                    url {
                         protocol = URLProtocol.WS
                         host = it.host
                         port = it.port
@@ -119,6 +118,8 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
                     }
                 }
 
+                engine.application.serveVisionData(VisionRoute(cellRoute, visionManager), collector)
+
                 visionFragment(
                     context,
                     embedData = true,
@@ -126,13 +127,6 @@ public class VFForNotebook(override val context: Context) : ContextAware, Corout
                     collector = collector,
                     fragment = fragment
                 )
-
-                engine.application.require(Routing) {
-                    route(cellRoute) {
-                        serveVisionData(TODO(), collector)
-                    }
-                }
-
             } else {
                 //if not, use static rendering
                 visionFragment(context, fragment = fragment)

visionforge-server/src/main/kotlin/space/kscience/visionforge/server/VisionServer.kt

@@ -21,6 +21,7 @@ import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.html.*
+import kotlinx.html.stream.createHTML
 import space.kscience.dataforge.context.Context
 import space.kscience.dataforge.context.ContextAware
 import space.kscience.dataforge.meta.*
@@ -30,12 +31,16 @@ import space.kscience.visionforge.VisionChange
 import space.kscience.visionforge.VisionManager
 import space.kscience.visionforge.flowChanges
 import space.kscience.visionforge.html.*
-import java.awt.Desktop
-import java.net.URI
 import kotlin.time.Duration.Companion.milliseconds
 
 
-public enum class DataServeMode {
+public class VisionRoute(
+    public val route: String,
+    public val visionManager: VisionManager,
+    override val meta: ObservableMutableMeta = MutableMeta(),
+) : Configurable, ContextAware {
+
+    public enum class Mode {
         /**
          * Embed the initial state of the vision inside its html tag.
          */
@@ -50,12 +55,7 @@ public enum class DataServeMode {
          * Connect to server to get pushes. The address of the server is embedded in the tag.
          */
         UPDATE
-}
+    }
-
-public class VisionRouteConfiguration(
-    public val visionManager: VisionManager,
-    override val meta: ObservableMutableMeta = MutableMeta(),
-) : Configurable, ContextAware {
 
     override val context: Context get() = visionManager.context
 
@@ -64,7 +64,7 @@ public class VisionRouteConfiguration(
      */
     public var updateInterval: Long by meta.long(300, key = UPDATE_INTERVAL_KEY)
 
-    public var dataMode: DataServeMode by meta.enum(DataServeMode.UPDATE)
+    public var dataMode: Mode by meta.enum(Mode.UPDATE)
 
     public companion object {
         public const val DEFAULT_PORT: Int = 7777
@@ -78,11 +78,17 @@ public class VisionRouteConfiguration(
  * Serve visions in a given [route] without providing a page template.
  * [visions] could be changed during the service.
  */
-public fun Route.serveVisionData(
+public fun Application.serveVisionData(
-    configuration: VisionRouteConfiguration,
+    configuration: VisionRoute,
     resolveVision: (Name) -> Vision?,
 ) {
-    application.log.info("Serving visions at ${this@serveVisionData}")
+    require(WebSockets)
+    routing {
+        route(configuration.route) {
+            install(CORS) {
+                anyHost()
+            }
+            application.log.info("Serving visions at ${configuration.route}")
 
             //Update websocket
             webSocket("ws") {
@@ -131,12 +137,15 @@ public fun Route.serveVisionData(
                     )
                 }
             }
+        }
+    }
 }
 
-public fun Route.serveVisionData(
+public fun Application.serveVisionData(
-    configuration: VisionRouteConfiguration,
+    configuration: VisionRoute,
     cache: VisionCollector,
 ): Unit = serveVisionData(configuration) { cache[it]?.second }
+
 //
 ///**
 // * Compile a fragment to string and serve visions from it
@@ -161,24 +170,18 @@ public fun Route.serveVisionData(
 /**
  * Serve a page, potentially containing any number of visions at a given [route] with given [header].
  */
-public fun Route.visionPage(
+public fun Application.visionPage(
-    configuration: VisionRouteConfiguration,
+    route: String,
+    configuration: VisionRoute,
+    connector: EngineConnectorConfig,
     headers: Collection<HtmlFragment>,
     visionFragment: HtmlVisionFragment,
 ) {
-    application.require(WebSockets)
+    require(WebSockets)
-    require(CORS) {
-        anyHost()
-    }
 
-    val visionCache: VisionCollector = mutableMapOf()
+    val collector: VisionCollector = mutableMapOf()
-    serveVisionData(configuration, visionCache)
 
-    //filled pages
+    val html = createHTML().apply {
-    get {
-        //re-create html and vision list on each call
-        call.respondHtml {
-            val callbackUrl = call.url()
         head {
             meta {
                 charset = "utf-8"
@@ -191,61 +194,61 @@ public fun Route.visionPage(
             //Load the fragment and remember all loaded visions
             visionFragment(
                 context = configuration.context,
-                    embedData = configuration.dataMode == DataServeMode.EMBED,
+                embedData = configuration.dataMode == VisionRoute.Mode.EMBED,
-                    fetchDataUrl = if (configuration.dataMode != DataServeMode.EMBED) {
+                fetchDataUrl = if (configuration.dataMode != VisionRoute.Mode.EMBED) {
-                        URLBuilder(callbackUrl).apply {
+                    url {
-                            pathSegments = pathSegments + "data"
+                        host = connector.host
-                        }.buildString()
+                        port = connector.port
+                        path(route, "data")
+                    }
                 } else null,
-                    updatesUrl = if (configuration.dataMode == DataServeMode.UPDATE) {
+                updatesUrl = if (configuration.dataMode == VisionRoute.Mode.UPDATE) {
-                        URLBuilder(callbackUrl).apply {
+                    url {
                         protocol = URLProtocol.WS
-                            pathSegments = pathSegments + "ws"
+                        host = connector.host
-                        }.buildString()
+                        port = connector.port
+                        path(route, "ws")
+                    }
                 } else null,
-                    visionCache = visionCache,
+                visionCache = collector,
                 fragment = visionFragment
             )
         }
-        }
+    }.finalize()
 
+    //serve data
+    serveVisionData(configuration, collector)
+
+    //filled pages
+    routing {
+        get(route) {
+            call.respondText(html, ContentType.Text.Html)
+        }
     }
 }
 
-public fun Route.visionPage(
+public fun Application.visionPage(
+    connector: EngineConnectorConfig,
     visionManager: VisionManager,
     vararg headers: HtmlFragment,
-    configurationBuilder: VisionRouteConfiguration.() -> Unit = {},
+    route: String = "/",
+    configurationBuilder: VisionRoute.() -> Unit = {},
     visionFragment: HtmlVisionFragment,
 ) {
-    val configuration = VisionRouteConfiguration(visionManager).apply(configurationBuilder)
+    val configuration = VisionRoute(route, visionManager).apply(configurationBuilder)
-    visionPage(configuration, listOf(*headers), visionFragment)
+    visionPage(route, configuration, connector, listOf(*headers), visionFragment)
 }
 
 /**
  * Render given [VisionPage] at server
  */
-public fun Route.visionPage(page: VisionPage, configurationBuilder: VisionRouteConfiguration.() -> Unit = {}) {
+public fun Application.visionPage(
-    val configuration = VisionRouteConfiguration(page.visionManager).apply(configurationBuilder)
+    connector: EngineConnectorConfig,
-    visionPage(configuration, page.pageHeaders.values, visionFragment = page.content)
+    page: VisionPage,
+    route: String = "/",
+    configurationBuilder: VisionRoute.() -> Unit = {},
+) {
+    val configuration = VisionRoute(route, page.visionManager).apply(configurationBuilder)
+    visionPage(route, configuration, connector, page.pageHeaders.values, visionFragment = page.content)
 }
 
-public fun <P : Pipeline<*, ApplicationCall>, B : Any, F : Any> P.require(
-    plugin: Plugin<P, B, F>,
-    configure: B.() -> Unit = {},
-): F = pluginOrNull(plugin) ?: install(plugin, configure)
-
-
-/**
- * Connect to a given Ktor server using browser
- */
-public fun ApplicationEngine.openInBrowser() {
-    val connector = environment.connectors.first()
-    val uri = URI("http", null, connector.host, connector.port, null, null, null)
-    Desktop.getDesktop().browse(uri)
-}
-
-/**
- * Stop the server with default timeouts
- */
-public fun ApplicationEngine.close(): Unit = stop(1000, 5000)

visionforge-server/src/main/kotlin/space/kscience/visionforge/server/applicationExtensions.kt

@@ -0,0 +1,38 @@
+package space.kscience.visionforge.server
+
+import io.ktor.server.application.ApplicationCall
+import io.ktor.server.application.Plugin
+import io.ktor.server.application.install
+import io.ktor.server.application.pluginOrNull
+import io.ktor.server.engine.ApplicationEngine
+import io.ktor.server.engine.EngineConnectorBuilder
+import io.ktor.server.engine.EngineConnectorConfig
+import io.ktor.util.pipeline.Pipeline
+import java.awt.Desktop
+import java.net.URI
+
+
+public fun <P : Pipeline<*, ApplicationCall>, B : Any, F : Any> P.require(
+    plugin: Plugin<P, B, F>,
+): F = pluginOrNull(plugin) ?: install(plugin)
+
+
+/**
+ * Connect to a given Ktor server using browser
+ */
+public fun ApplicationEngine.openInBrowser() {
+    val connector = environment.connectors.first()
+    val uri = URI("http", null, connector.host, connector.port, null, null, null)
+    Desktop.getDesktop().browse(uri)
+}
+
+/**
+ * Stop the server with default timeouts
+ */
+public fun ApplicationEngine.close(): Unit = stop(1000, 5000)
+
+
+public fun EngineConnectorConfig(host: String, port: Int): EngineConnectorConfig = EngineConnectorBuilder().apply {
+    this.host = host
+    this.port = port
+}