Add server-side prerendering for Angular 2 template

src/Microsoft.AspNet.SpaServices/Content/Node/prerenderer.js

@@ -31,7 +31,7 @@ function loadViaTypeScript(module, filename) {
     // First perform a minimal transpilation from TS code to ES2015. This is very fast (doesn't involve type checking)
     // and is unlikely to need any special compiler options
     var src = fs.readFileSync(filename, 'utf8');
-    var compilerOptions = { jsx: ts.JsxEmit.Preserve, module: ts.ModuleKind.ES2015, target: ts.ScriptTarget.ES6 };
+    var compilerOptions = { jsx: ts.JsxEmit.Preserve, module: ts.ModuleKind.ES2015, target: ts.ScriptTarget.ES6, emitDecoratorMetadata: true };
     var es6Code = ts.transpile(src, compilerOptions, 'test.tsx', /* diagnostics */ []);
     
     // Second, process the ES2015 via Babel. We have to do this (instead of going directly from TS to ES5) because
@@ -116,6 +116,7 @@ function renderToString(callback, bootModulePath, bootModuleExport, absoluteRequ
     var params = {
         location: url.parse(requestPathAndQuery),
         url: requestPathAndQuery,
+        absoluteUrl: absoluteRequestUrl,
         domainTasks: domainTaskCompletionPromise
     };
 

templates/Angular2Spa/ClientApp/boot-server.ts

@@ -0,0 +1,32 @@
+import 'angular2-universal-preview/dist/server/universal-polyfill.js';
+import * as ngCore from 'angular2/core';
+import * as ngRouter from 'angular2/router';
+import * as ngUniversal from 'angular2-universal-preview';
+import { BASE_URL } from 'angular2-universal-preview/dist/server/src/http/node_http';
+import * as ngUniversalRender from 'angular2-universal-preview/dist/server/src/render';
+
+// TODO: Make this ugly code go away, e.g., by somehow loading via Webpack
+function loadAsString(module, filename) {
+    module.exports = require('fs').readFileSync(filename, 'utf8');
+}
+(require as any).extensions['.html'] = loadAsString;
+(require as any).extensions['.css'] = loadAsString;
+let App: any = require('./components/app/app').App;
+
+export default function (params: any): Promise<{ html: string }> {
+    return new Promise<{ html: string, globals: { [key: string]: any } }>((resolve, reject) => {
+        const serverBindings = [
+            ngRouter.ROUTER_BINDINGS,
+            ngUniversal.HTTP_PROVIDERS,
+            ngCore.provide(BASE_URL, { useValue: params.absoluteUrl }),
+            ngCore.provide(ngUniversal.REQUEST_URL, { useValue: params.url }),
+            ngCore.provide(ngRouter.APP_BASE_HREF, { useValue: '/' }),
+            ngUniversal.SERVER_LOCATION_PROVIDERS
+        ];
+
+        ngUniversalRender.renderToString(App, serverBindings).then(
+            html => resolve({ html, globals: {} }), 
+            reject // Also propagate any errors back into the host application
+        );
+    });
+}

templates/Angular2Spa/ClientApp/components/fetch-data/fetch-data.ts

@@ -1,5 +1,5 @@
 import * as ng from 'angular2/core';
-import fetch from 'isomorphic-fetch';
+import { Http } from 'angular2/http';
 
 @ng.Component({
   selector: 'fetch-data'
@@ -10,12 +10,10 @@ import fetch from 'isomorphic-fetch';
 export class FetchData {
     public forecasts: WeatherForecast[];
     
-    constructor() {
-        fetch('/api/SampleData/WeatherForecasts')
-            .then(response => response.json())
-            .then((data: WeatherForecast[]) => {
-                this.forecasts = data;
-            });
+    constructor(http: Http) {
+        http.get('/api/SampleData/WeatherForecasts').subscribe(result => {
+            this.forecasts = result.json(); 
+        });
     }
 }
 

templates/Angular2Spa/ClientApp/components/home/home.html

@@ -9,6 +9,7 @@
 <p>To help you get started, we've also set up:</p>
 <ul>
     <li><strong>Client-side navigation</strong>. For example, click <em>Counter</em> then <em>Back</em> to return here.</li>
+    <li><strong>Server-side prerendering</strong>. For faster initial loading and improved SEO, your Angular 2 app is prerendered on the server. The resulting HTML is then transferred to the browser where a client-side copy of the app takes over.</li>
     <li><strong>Webpack dev middleware</strong>. In development mode, there's no need to run the <code>webpack</code> build tool. Your client-side resources are dynamically built on demand. Updates are available as soon as you modify any file.</li>
     <li><strong>Hot module replacement</strong>. In development mode, you don't even need to reload the page after making most changes. Within seconds of saving changes to files, your Angular 2 app will be rebuilt and a new instance injected is into the page.</li>
     <li><strong>Efficient production builds</strong>. In production mode, development-time features are disabled, and the <code>webpack</code> build tool produces minified static CSS and JavaScript files.</li>

templates/Angular2Spa/Views/Home/Index.cshtml

@@ -2,7 +2,7 @@
     ViewData["Title"] = "Home Page";
 }
 
-<app>Loading...</app>
+<app asp-prerender-module="ClientApp/boot-server">Loading...</app>
 
 @section scripts {
     <script src="~/dist/main.js" asp-append-version="true"></script>

templates/Angular2Spa/Views/_ViewImports.cshtml

@@ -1,2 +1,3 @@
 @using WebApplicationBasic
 @addTagHelper "*, Microsoft.AspNet.Mvc.TagHelpers"
+@addTagHelper "*, Microsoft.AspNet.SpaServices"

templates/Angular2Spa/package.json

@@ -25,10 +25,15 @@
   },
   "dependencies": {
     "angular2": "^2.0.0-beta.7",
+    "angular2-universal-preview": "^0.55.4",
     "babel-core": "^6.5.2",
+    "css": "^2.2.1",
+    "domain-task": "^1.0.0",
     "es6-shim": "^0.33.13",
     "es7-reflect-metadata": "^1.5.5",
     "isomorphic-fetch": "^2.2.1",
+    "parse5": "^1.5.1",
+    "preboot": "^1.1.3",
     "reflect-metadata": "^0.1.2",
     "rxjs": "^5.0.0-beta.2",
     "zone.js": "^0.5.15"

templates/Angular2Spa/tsconfig.json

@@ -3,7 +3,8 @@
     "moduleResolution": "node",
     "target": "es6",
     "sourceMap": true,
-    "experimentalDecorators": true
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true
   },
   "exclude": [
       "node_modules"

templates/Angular2Spa/tsd.json

@@ -7,9 +7,6 @@
   "installed": {
     "requirejs/require.d.ts": {
       "commit": "dade4414712ce84e3c63393f1aae407e9e7e6af7"
-    },
-    "isomorphic-fetch/isomorphic-fetch.d.ts": {
-      "commit": "4d2d0653003a4d1df4d7c68054cce4f4ace58bdf"
     }
   }
 }

templates/Angular2Spa/typings/isomorphic-fetch/isomorphic-fetch.d.ts

@@ -1,119 +0,0 @@
-// Type definitions for isomorphic-fetch
-// Project: https://github.com/matthew-andrews/isomorphic-fetch
-// Definitions by: Todd Lucas <https://github.com/toddlucas>
-// Definitions: https://github.com/borisyankov/DefinitelyTyped
-
-declare enum RequestContext {
-    "audio", "beacon", "cspreport", "download", "embed", "eventsource", 
-    "favicon", "fetch", "font", "form", "frame", "hyperlink", "iframe", 
-    "image", "imageset", "import", "internal", "location", "manifest", 
-    "object", "ping", "plugin", "prefetch", "script", "serviceworker", 
-    "sharedworker", "subresource", "style", "track", "video", "worker",
-    "xmlhttprequest", "xslt"
-}
-declare enum RequestMode { "same-origin", "no-cors", "cors" }
-declare enum RequestCredentials { "omit", "same-origin", "include" }
-declare enum RequestCache { 
-    "default", "no-store", "reload", "no-cache", "force-cache", 
-    "only-if-cached"
-}
-declare enum ResponseType { "basic", "cors", "default", "error", "opaque" }
-
-declare type HeaderInit = Headers | Array<string>;
-declare type BodyInit = Blob | FormData | string;
-declare type RequestInfo = Request | string;
-
-interface RequestInit {
-    method?: string;
-    headers?: HeaderInit | { [index: string]: string };
-    body?: BodyInit;
-    mode?: string | RequestMode;
-    credentials?: string | RequestCredentials;
-    cache?: string | RequestCache;
-}
-
-interface IHeaders {
-    get(name: string): string;
-    getAll(name: string): Array<string>;
-    has(name: string): boolean;
-}
-
-declare class Headers implements IHeaders {
-    append(name: string, value: string): void;
-    delete(name: string):void;
-    get(name: string): string;
-    getAll(name: string): Array<string>;
-    has(name: string): boolean;
-    set(name: string, value: string): void;
-}
-
-interface IBody {
-    bodyUsed: boolean;
-    arrayBuffer(): Promise<ArrayBuffer>;
-    blob(): Promise<Blob>;
-    formData(): Promise<FormData>;
-    json(): Promise<any>;
-    json<T>(): Promise<T>;
-    text(): Promise<string>;
-}
-
-declare class Body implements IBody {
-    bodyUsed: boolean;
-    arrayBuffer(): Promise<ArrayBuffer>;
-    blob(): Promise<Blob>;
-    formData(): Promise<FormData>;
-    json(): Promise<any>;
-    json<T>(): Promise<T>;
-    text(): Promise<string>;
-}
-
-interface IRequest extends IBody {
-    method: string;
-    url: string;
-    headers: Headers;
-    context: string | RequestContext;
-    referrer: string;
-    mode: string | RequestMode;
-    credentials: string | RequestCredentials;
-    cache: string | RequestCache;
-}
-
-declare class Request extends Body implements IRequest {
-    constructor(input: string | Request, init?: RequestInit);
-    method: string;
-    url: string;
-    headers: Headers;
-    context: string | RequestContext;
-    referrer: string;
-    mode: string | RequestMode;
-    credentials: string | RequestCredentials;
-    cache: string | RequestCache;
-}
-
-interface IResponse extends IBody {
-    url: string;
-    status: number;
-    statusText: string;
-    ok: boolean;
-    headers: IHeaders;
-    type: string | ResponseType;
-    size: number;
-    timeout: number;
-    redirect(url: string, status: number): IResponse;
-    error(): IResponse;
-    clone(): IResponse;
-}
-
-interface IFetchStatic {
-    Promise: any;
-    Headers: IHeaders
-    Request: IRequest;
-    Response: IResponse;
-    (url: string | IRequest, init?: RequestInit): Promise<IResponse>;
-}
-
-declare module "isomorphic-fetch" {
-    export default IFetchStatic;
-}
-
-declare var fetch: IFetchStatic;

templates/Angular2Spa/typings/tsd.d.ts

@@ -1,3 +1,2 @@
 
 /// <reference path="requirejs/require.d.ts" />
-/// <reference path="isomorphic-fetch/isomorphic-fetch.d.ts" />

templates/Angular2Spa/webpack.config.js

@@ -19,7 +19,7 @@ module.exports = merge({
         ]
     },
     entry: {
-        main: ['./ClientApp/boot.ts'],
+        main: ['./ClientApp/boot-client.ts'],
         vendor: ['angular2/bundles/angular2-polyfills.js', 'bootstrap', 'bootstrap/dist/css/bootstrap.css', 'style-loader', 'jquery', 'angular2/core', 'angular2/common', 'angular2/http', 'angular2/router', 'angular2/platform/browser']
     },
     output: {