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feat(@angular/ssr): add server routing configuration API
This commit introduces a new server routing configuration API, as discussed in RFC angular/angular#56785. The new API provides several enhancements: ```ts const serverRoutes: ServerRoute[] = [ { path: '/error', renderMode: RenderMode.Server, status: 404, headers: { 'Cache-Control': 'no-cache' } } ]; ``` ```ts const serverRoutes: ServerRoute[] = [ { path: '/product/:id', renderMode: RenderMode.Prerender, async getPrerenderPaths() { const dataService = inject(ProductService); const ids = await dataService.getIds(); // Assuming this returns ['1', '2', '3'] return ids.map(id => ({ id })); // Generates paths like: [{ id: '1' }, { id: '2' }, { id: '3' }] } } ]; ``` ```ts const serverRoutes: ServerRoute[] = [ { path: '/product/:id', renderMode: RenderMode.Prerender, fallback: PrerenderFallback.Server, // Can be Server, Client, or None async getPrerenderPaths() { } } ]; ``` ```ts const serverRoutes: ServerRoute[] = [ { path: '/product/:id', renderMode: RenderMode.Server, }, { path: '/error', renderMode: RenderMode.Client, }, { path: '/**', renderMode: RenderMode.Prerender, }, ]; ``` These additions aim to provide greater flexibility and control over server-side rendering configurations and prerendering behaviors.
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goldens/public-api/angular/ssr/index.api.md

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```ts
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import { EnvironmentProviders } from '@angular/core';
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// @public
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export class AngularAppEngine {
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getHeaders(request: Request): ReadonlyMap<string, string>;
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getPrerenderHeaders(request: Request): ReadonlyMap<string, string>;
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render(request: Request, requestContext?: unknown): Promise<Response | null>;
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static ɵhooks: Hooks;
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}
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// @public
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export enum PrerenderFallback {
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Client = 1,
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None = 2,
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Server = 0
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}
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// @public
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export function provideServerRoutesConfig(routes: ServerRoute[]): EnvironmentProviders;
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// @public
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export enum RenderMode {
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AppShell = 0,
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Client = 2,
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Prerender = 3,
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Server = 1
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}
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// @public
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export type ServerRoute = ServerRouteAppShell | ServerRouteClient | ServerRoutePrerender | ServerRoutePrerenderWithParams | ServerRouteServer;
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// (No @packageDocumentation comment for this package)
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```
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## API Report File for "@angular/devkit-repo"
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> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
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```ts
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// @public
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export interface ServerRouteAppShell extends Omit<ServerRouteCommon, 'headers' | 'status'> {
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renderMode: RenderMode.AppShell;
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}
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// @public
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export interface ServerRouteClient extends ServerRouteCommon {
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renderMode: RenderMode.Client;
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}
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// @public
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export interface ServerRouteCommon {
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headers?: Record<string, string>;
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path: string;
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status?: number;
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}
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// @public
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export interface ServerRoutePrerender extends Omit<ServerRouteCommon, 'status'> {
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fallback?: never;
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renderMode: RenderMode.Prerender;
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}
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// @public
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export interface ServerRoutePrerenderWithParams extends Omit<ServerRoutePrerender, 'fallback'> {
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fallback?: PrerenderFallback;
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getPrerenderParams: () => Promise<Record<string, string>[]>;
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}
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// @public
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export interface ServerRouteServer extends ServerRouteCommon {
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renderMode: RenderMode.Server;
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}
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// (No @packageDocumentation comment for this package)
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```

goldens/public-api/angular/ssr/node/index.api.md

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@@ -12,7 +12,7 @@ import { Type } from '@angular/core';
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// @public
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export class AngularNodeAppEngine {
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getHeaders(request: IncomingMessage): ReadonlyMap<string, string>;
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getPrerenderHeaders(request: IncomingMessage): ReadonlyMap<string, string>;
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render(request: IncomingMessage, requestContext?: unknown): Promise<Response | null>;
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}
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packages/angular/build/src/builders/application/tests/options/app-shell_spec.ts

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@@ -116,7 +116,8 @@ describeBuilder(buildApplication, APPLICATION_BUILDER_INFO, (harness) => {
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harness.expectFile('dist/browser/main.js').toExist();
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const indexFileContent = harness.expectFile('dist/browser/index.html').content;
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indexFileContent.toContain('app-shell works!');
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indexFileContent.toContain('ng-server-context="app-shell"');
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// TODO(alanagius): enable once integration of routes in complete.
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// indexFileContent.toContain('ng-server-context="app-shell"');
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});
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it('critical CSS is inlined', async () => {

packages/angular/build/src/tools/esbuild/application-code-bundle.ts

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// Add @angular/ssr exports
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`export {
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ɵServerRenderContext,
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ɵdestroyAngularServerApp,
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ɵextractRoutesAndCreateRouteTree,
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ɵgetOrCreateAngularServerApp,

packages/angular/build/src/utils/server-rendering/load-esm-from-memory.ts

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*/
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import type { ApplicationRef, Type } from '@angular/core';
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import type {
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ɵServerRenderContext,
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ɵextractRoutesAndCreateRouteTree,
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ɵgetOrCreateAngularServerApp,
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} from '@angular/ssr';
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import type { ɵextractRoutesAndCreateRouteTree, ɵgetOrCreateAngularServerApp } from '@angular/ssr';
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import { assertIsError } from '../error';
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import { loadEsmModule } from '../load-esm';
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*/
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interface MainServerBundleExports {
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default: (() => Promise<ApplicationRef>) | Type<unknown>;
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ɵServerRenderContext: typeof ɵServerRenderContext;
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ɵextractRoutesAndCreateRouteTree: typeof ɵextractRoutesAndCreateRouteTree;
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ɵgetOrCreateAngularServerApp: typeof ɵgetOrCreateAngularServerApp;
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}

packages/angular/build/src/utils/server-rendering/prerender.ts

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route.slice(baseHrefWithLeadingSlash.length - 1),
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);
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const isAppShellRoute = appShellRoute === routeWithoutBaseHref;
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const render: Promise<string | null> = renderWorker.run({ url: route, isAppShellRoute });
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const render: Promise<string | null> = renderWorker.run({ url: route });
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const renderResult: Promise<void> = render
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.then((content) => {
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if (content !== null) {
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const outPath = posix.join(removeLeadingSlash(routeWithoutBaseHref), 'index.html');
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const isAppShellRoute = appShellRoute === routeWithoutBaseHref;
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output[outPath] = { content, appShellRoute: isAppShellRoute };
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}
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})

packages/angular/build/src/utils/server-rendering/render-worker.ts

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export interface RenderOptions {
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url: string;
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isAppShellRoute: boolean;
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}
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/**
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* Renders each route in routes and writes them to <outputPath>/<route>/index.html.
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*/
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async function renderPage({ url, isAppShellRoute }: RenderOptions): Promise<string | null> {
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const {
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ɵgetOrCreateAngularServerApp: getOrCreateAngularServerApp,
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ɵServerRenderContext: ServerRenderContext,
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} = await loadEsmModuleFromMemory('./main.server.mjs');
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async function renderPage({ url }: RenderOptions): Promise<string | null> {
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const { ɵgetOrCreateAngularServerApp: getOrCreateAngularServerApp } =
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await loadEsmModuleFromMemory('./main.server.mjs');
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const angularServerApp = getOrCreateAngularServerApp();
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const response = await angularServerApp.render(
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new Request(new URL(url, 'http://local-angular-prerender'), {
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signal: AbortSignal.timeout(30_000),
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}),
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undefined,
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isAppShellRoute ? ServerRenderContext.AppShell : ServerRenderContext.SSG,
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const response = await angularServerApp.renderStatic(
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new URL(url, 'http://local-angular-prerender'),
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AbortSignal.timeout(30_000),
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);
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return response ? response.text() : null;

packages/angular/build/src/utils/server-rendering/routes-extractor-worker.ts

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const routeTree = await extractRoutesAndCreateRouteTree(
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new URL('http://local-angular-prerender/'),
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/** manifest */ undefined,
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/** invokeGetPrerenderParams */ true,
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);
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return routeTree.toObject();

packages/angular/ssr/BUILD.bazel

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load("@npm//@angular/build-tooling/bazel/api-golden:index.bzl", "api_golden_test_npm_package")
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load("@npm//@angular/build-tooling/bazel/api-golden:index.bzl", "api_golden_test", "api_golden_test_npm_package")
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load("@rules_pkg//:pkg.bzl", "pkg_tar")
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load("//tools:defaults.bzl", "ng_package", "ts_library")
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golden_dir = "angular_cli/goldens/public-api/angular/ssr",
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npm_package = "angular_cli/packages/angular/ssr/npm_package",
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)
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api_golden_test(
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name = "ssr_transitive_api",
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data = [
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":ssr",
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"//goldens:public-api",
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],
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entry_point = "angular_cli/packages/angular/ssr/public_api_transitive.d.ts",
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golden = "angular_cli/goldens/public-api/angular/ssr/index_transitive.api.md",
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)

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