Generate legacy vars when rendering all applications (elastic#54768)

* Generate legacy vars when rendering all applications

* Move rendering functional tests and add user settings tests

* Make rendering integration tests more robust, get data from page

* Address review nits, fix CI failures

* Remove extraneous file

* Fix type error

docs/development/core/server/kibana-plugin-server.iscopedrenderingclient.render.md

@@ -9,14 +9,14 @@ Generate a `KibanaResponse` which renders an HTML page bootstrapped with the `co
 <b>Signature:</b>
 
 ```typescript
-render(options?: IRenderOptions): Promise<string>;
+render(options?: Pick<IRenderOptions, 'includeUserSettings'>): Promise<string>;
 ```
 
 ## Parameters
 
 |  Parameter | Type | Description |
 |  --- | --- | --- |
-|  options | <code>IRenderOptions</code> |  |
+|  options | <code>Pick&lt;IRenderOptions, 'includeUserSettings'&gt;</code> |  |
 
 <b>Returns:</b>
 

src/core/server/index.ts

@@ -152,7 +152,7 @@ export {
   SessionCookieValidationResult,
   SessionStorageFactory,
 } from './http';
-export { RenderingServiceSetup, IRenderOptions, LegacyRenderOptions } from './rendering';
+export { RenderingServiceSetup, IRenderOptions } from './rendering';
 export { Logger, LoggerFactory, LogMeta, LogRecord, LogLevel } from './logging';
 
 export {

src/core/server/legacy/legacy_internals.ts

@@ -19,7 +19,8 @@
 
 import { Server } from 'hapi';
 
-import { LegacyRequest } from '../http';
+import { KibanaRequest, LegacyRequest } from '../http';
+import { ensureRawRequest } from '../http/router';
 import { mergeVars } from './merge_vars';
 import { ILegacyInternals, LegacyVars, VarsInjector, LegacyConfig, LegacyUiExports } from './types';
 
@@ -51,11 +52,12 @@ export class LegacyInternals implements ILegacyInternals {
     ));
   }
 
-  private replaceVars(vars: LegacyVars, request: LegacyRequest) {
+  private replaceVars(vars: LegacyVars, request: KibanaRequest | LegacyRequest) {
     const { injectedVarsReplacers = [] } = this.uiExports;
 
     return injectedVarsReplacers.reduce(
-      async (injected, replacer) => replacer(await injected, request, this.server),
+      async (injected, replacer) =>
+        replacer(await injected, ensureRawRequest(request), this.server),
       Promise.resolve(vars)
     );
   }
@@ -78,7 +80,11 @@ export class LegacyInternals implements ILegacyInternals {
     );
   }
 
-  public async getVars(id: string, request: LegacyRequest, injected: LegacyVars = {}) {
+  public async getVars(
+    id: string,
+    request: KibanaRequest | LegacyRequest,
+    injected: LegacyVars = {}
+  ) {
     return this.replaceVars(
       mergeVars(this.defaultVars, await this.getInjectedUiAppVars(id), injected),
       request

src/core/server/legacy/legacy_service.ts

@@ -31,6 +31,7 @@ import { PathConfigType } from '../path';
 import { findLegacyPluginSpecs } from './plugins';
 import { convertLegacyDeprecationProvider } from './config';
 import {
+  ILegacyInternals,
   LegacyServiceSetupDeps,
   LegacyServiceStartDeps,
   LegacyPlugins,
@@ -82,6 +83,7 @@ export class LegacyService implements CoreService {
   private legacyRawConfig?: LegacyConfig;
   private legacyPlugins?: LegacyPlugins;
   private settings?: LegacyVars;
+  public legacyInternals?: ILegacyInternals;
 
   constructor(private readonly coreContext: CoreContext) {
     const { logger, configService } = coreContext;
@@ -183,6 +185,11 @@ export class LegacyService implements CoreService {
     // propagate the instance uuid to the legacy config, as it was the legacy way to access it.
     this.legacyRawConfig!.set('server.uuid', setupDeps.core.uuid.getInstanceUuid());
     this.setupDeps = setupDeps;
+    this.legacyInternals = new LegacyInternals(
+      this.legacyPlugins.uiExports,
+      this.legacyRawConfig!,
+      setupDeps.core.http.server
+    );
   }
 
   public async start(startDeps: LegacyServiceStartDeps) {
@@ -317,7 +324,7 @@ export class LegacyService implements CoreService {
           rendering: setupDeps.core.rendering,
           uiSettings: setupDeps.core.uiSettings,
           savedObjectsClientProvider: startDeps.core.savedObjects.clientProvider,
-          legacy: new LegacyInternals(legacyPlugins.uiExports, config, setupDeps.core.http.server),
+          legacy: this.legacyInternals,
         },
         logger: this.coreContext.logger,
       },

src/core/server/legacy/types.ts

@@ -20,7 +20,7 @@
 import { Server } from 'hapi';
 
 import { ChromeNavLink } from '../../public';
-import { LegacyRequest } from '../http';
+import { KibanaRequest, LegacyRequest } from '../http';
 import { InternalCoreSetup, InternalCoreStart } from '../internal_types';
 import { PluginsServiceSetup, PluginsServiceStart } from '../plugins';
 import { RenderingServiceSetup } from '../rendering';
@@ -198,7 +198,11 @@ export interface ILegacyInternals {
   /**
    * Get the metadata vars for a particular plugin
    */
-  getVars(id: string, request: LegacyRequest, injected?: LegacyVars): Promise<LegacyVars>;
+  getVars(
+    id: string,
+    request: KibanaRequest | LegacyRequest,
+    injected?: LegacyVars
+  ): Promise<LegacyVars>;
 }
 
 /**

src/core/server/rendering/rendering_service.tsx

@@ -27,10 +27,10 @@ import { CoreService } from '../../types';
 import { CoreContext } from '../core_context';
 import { Template } from './views';
 import {
+  IRenderOptions,
   RenderingSetupDeps,
   RenderingServiceSetup,
   RenderingMetadata,
-  LegacyRenderOptions,
 } from './types';
 
 /** @internal */
@@ -56,7 +56,7 @@ export class RenderingService implements CoreService<RenderingServiceSetup> {
           app = { getId: () => 'core' },
           includeUserSettings = true,
           vars = {},
-        }: LegacyRenderOptions = {}
+        }: IRenderOptions = {}
       ) => {
         const { env } = this.coreContext;
         const basePath = http.basePath.get(request);

src/core/server/rendering/types.ts

@@ -84,21 +84,19 @@ export interface IRenderOptions {
    * `true` by default.
    */
   includeUserSettings?: boolean;
-}
 
-/**
- * @internal
- * @deprecated for legacy use only, remove with ui_render_mixin
- */
-export interface LegacyRenderOptions extends IRenderOptions {
   /**
    * Render the bootstrapped HTML content for an optional legacy application.
    * Defaults to `core`.
+   * @deprecated for legacy use only, remove with ui_render_mixin
+   * @internal
    */
   app?: { getId(): string };
 
   /**
    * Inject custom vars into the page metadata.
+   * @deprecated for legacy use only, remove with ui_render_mixin
+   * @internal
    */
   vars?: Record<string, any>;
 }
@@ -123,7 +121,7 @@ export interface IScopedRenderingClient {
    * );
    * ```
    */
-  render(options?: IRenderOptions): Promise<string>;
+  render(options?: Pick<IRenderOptions, 'includeUserSettings'>): Promise<string>;
 }
 
 /** @internal */
@@ -140,6 +138,6 @@ export interface RenderingServiceSetup {
   render<R extends KibanaRequest | LegacyRequest>(
     request: R,
     uiSettings: IUiSettingsClient,
-    options?: R extends LegacyRequest ? LegacyRenderOptions : IRenderOptions
+    options?: IRenderOptions
   ): Promise<string>;
 }

src/core/server/server.api.md

@@ -820,7 +820,13 @@ export interface IndexSettingsDeprecationInfo {
 
 // @public (undocumented)
 export interface IRenderOptions {
+    // @internal @deprecated
+    app?: {
+        getId(): string;
+    };
     includeUserSettings?: boolean;
+    // @internal @deprecated
+    vars?: Record<string, any>;
 }
 
 // @public
@@ -849,7 +855,7 @@ export type IScopedClusterClient = Pick<ScopedClusterClient, 'callAsCurrentUser'
 
 // @public (undocumented)
 export interface IScopedRenderingClient {
-    render(options?: IRenderOptions): Promise<string>;
+    render(options?: Pick<IRenderOptions, 'includeUserSettings'>): Promise<string>;
 }
 
 // @public
@@ -949,21 +955,13 @@ export class LegacyInternals implements ILegacyInternals {
     // (undocumented)
     getInjectedUiAppVars(id: string): Promise<Record<string, any>>;
     // (undocumented)
-    getVars(id: string, request: LegacyRequest, injected?: LegacyVars): Promise<Record<string, any>>;
+    getVars(id: string, request: KibanaRequest | LegacyRequest, injected?: LegacyVars): Promise<Record<string, any>>;
     // Warning: (ae-forgotten-export) The symbol "VarsInjector" needs to be exported by the entry point index.d.ts
     //
     // (undocumented)
     injectUiAppVars(id: string, injector: VarsInjector): void;
     }
 
-// @internal @deprecated (undocumented)
-export interface LegacyRenderOptions extends IRenderOptions {
-    app?: {
-        getId(): string;
-    };
-    vars?: Record<string, any>;
-}
-
 // @public @deprecated (undocumented)
 export interface LegacyRequest extends Request {
 }
@@ -1250,7 +1248,7 @@ export type RedirectResponseOptions = HttpResponseOptions & {
 
 // @internal (undocumented)
 export interface RenderingServiceSetup {
-    render<R extends KibanaRequest | LegacyRequest>(request: R, uiSettings: IUiSettingsClient, options?: R extends LegacyRequest ? LegacyRenderOptions : IRenderOptions): Promise<string>;
+    render<R extends KibanaRequest | LegacyRequest>(request: R, uiSettings: IUiSettingsClient, options?: IRenderOptions): Promise<string>;
 }
 
 // @public

src/core/server/server.ts

@@ -220,7 +220,11 @@ export class Server {
 
         return {
           rendering: {
-            render: rendering.render.bind(rendering, req, uiSettingsClient),
+            render: async (options = {}) =>
+              rendering.render(req, uiSettingsClient, {
+                ...options,
+                vars: await this.legacy.legacyInternals!.getVars('core', req),
+              }),
           },
           savedObjects: {
             client: savedObjectsClient,

src/plugins/testbed/server/index.ts

@@ -23,7 +23,6 @@ import { schema, TypeOf } from '@kbn/config-schema';
 import {
   CoreSetup,
   CoreStart,
-  LegacyRenderOptions,
   Logger,
   PluginInitializerContext,
   PluginConfigDescriptor,
@@ -78,29 +77,6 @@ class Plugin {
       }
     );
 
-    router.get(
-      {
-        path: '/requestcontext/render/{id}',
-        validate: {
-          params: schema.object({
-            id: schema.maybe(schema.string()),
-          }),
-        },
-      },
-      async (context, req, res) => {
-        const { id } = req.params;
-        const options: Partial<LegacyRenderOptions> = { app: { getId: () => id! } };
-        const body = await context.core.rendering.render(options);
-
-        return res.ok({
-          body,
-          headers: {
-            'content-securty-policy': core.http.csp.header,
-          },
-        });
-      }
-    );
-
     return {
       data$: this.initializerContext.config.create<ConfigType>().pipe(
         map(configValue => {

test/api_integration/apis/core/index.js

@@ -33,11 +33,6 @@ export default function({ getService }) {
             200,
             'SavedObjects client: {"page":1,"per_page":20,"total":0,"saved_objects":[]}'
           ));
-
-      it('provides access to application rendering client', async () => {
-        await supertest.get('/requestcontext/render/core').expect(200, /app:core/);
-        await supertest.get('/requestcontext/render/testbed').expect(200, /app:testbed/);
-      });
     });
 
     describe('compression', () => {

test/plugin_functional/plugins/rendering_plugin/kibana.json

@@ -0,0 +1,8 @@
+{
+  "id": "rendering_plugin",
+  "version": "0.0.1",
+  "kibanaVersion": "kibana",
+  "configPath": ["rendering_plugin"],
+  "server": true,
+  "ui": true
+}

test/plugin_functional/plugins/rendering_plugin/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "rendering_plugin",
+  "version": "1.0.0",
+  "main": "target/test/plugin_functional/plugins/rendering_plugin",
+  "kibana": {
+    "version": "kibana",
+    "templateVersion": "1.0.0"
+  },
+  "license": "Apache-2.0",
+  "scripts": {
+    "kbn": "node ../../../../scripts/kbn.js",
+    "build": "rm -rf './target' && tsc"
+  },
+  "devDependencies": {
+    "typescript": "3.5.3"
+  }
+}

test/plugin_functional/plugins/rendering_plugin/public/index.ts

@@ -0,0 +1,23 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { PluginInitializer } from 'kibana/public';
+import { RenderingPlugin } from './plugin';
+
+export const plugin: PluginInitializer<void, void> = () => new RenderingPlugin();

test/plugin_functional/plugins/rendering_plugin/public/plugin.tsx

@@ -0,0 +1,41 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import React from 'react';
+import { render, unmountComponentAtNode } from 'react-dom';
+import { Plugin, CoreSetup } from 'kibana/public';
+
+export class RenderingPlugin implements Plugin {
+  public setup(core: CoreSetup) {
+    core.application.register({
+      id: 'rendering',
+      title: 'Rendering',
+      appRoute: '/render',
+      async mount(context, { element }) {
+        render(<h1 data-test-subj="renderingHeader">rendering service</h1>, element);
+
+        return () => unmountComponentAtNode(element);
+      },
+    });
+  }
+
+  public start() {}
+
+  public stop() {}
+}