@angular/build
Version:
Official build system for Angular
98 lines (97 loc) • 5.08 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createAngularSsrInternalMiddleware = createAngularSsrInternalMiddleware;
exports.createAngularSsrExternalMiddleware = createAngularSsrExternalMiddleware;
const load_esm_1 = require("../../../utils/load-esm");
const utils_1 = require("../../../utils/server-rendering/utils");
function createAngularSsrInternalMiddleware(server, indexHtmlTransformer) {
let cachedAngularServerApp;
return function angularSsrMiddleware(req, res, next) {
if (req.url === undefined) {
return next();
}
(async () => {
// Load the compiler because `@angular/ssr/node` depends on `@angular/` packages,
// which must be processed by the runtime linker, even if they are not used.
await (0, load_esm_1.loadEsmModule)('@angular/compiler');
const { writeResponseToNodeResponse, createWebRequestFromNodeRequest } = await (0, load_esm_1.loadEsmModule)('@angular/ssr/node');
const { ɵgetOrCreateAngularServerApp } = (await server.ssrLoadModule('/main.server.mjs'));
// `ɵgetOrCreateAngularServerApp` can be undefined right after an error.
// See: https://github.com/angular/angular-cli/issues/29907
if (!ɵgetOrCreateAngularServerApp) {
return next();
}
const angularServerApp = ɵgetOrCreateAngularServerApp({
allowStaticRouteRender: true,
});
// Only Add the transform hook only if it's a different instance.
if (cachedAngularServerApp !== angularServerApp) {
angularServerApp.hooks.on('html:transform:pre', async ({ html, url }) => {
const processedHtml = await server.transformIndexHtml(url.pathname, html);
return indexHtmlTransformer?.(processedHtml) ?? processedHtml;
});
cachedAngularServerApp = angularServerApp;
}
const webReq = new Request(createWebRequestFromNodeRequest(req), {
signal: AbortSignal.timeout(30_000),
});
const webRes = await angularServerApp.handle(webReq);
if (!webRes) {
return next();
}
return writeResponseToNodeResponse(webRes, res);
})().catch(next);
};
}
async function createAngularSsrExternalMiddleware(server, indexHtmlTransformer) {
let fallbackWarningShown = false;
let cachedAngularAppEngine;
let angularSsrInternalMiddleware;
// Load the compiler because `@angular/ssr/node` depends on `@angular/` packages,
// which must be processed by the runtime linker, even if they are not used.
await (0, load_esm_1.loadEsmModule)('@angular/compiler');
const { createWebRequestFromNodeRequest, writeResponseToNodeResponse } = await (0, load_esm_1.loadEsmModule)('@angular/ssr/node');
return function angularSsrExternalMiddleware(req, res, next) {
(async () => {
const { reqHandler, AngularAppEngine } = (await server.ssrLoadModule('./server.mjs'));
if (!(0, utils_1.isSsrNodeRequestHandler)(reqHandler) && !(0, utils_1.isSsrRequestHandler)(reqHandler)) {
if (!fallbackWarningShown) {
// eslint-disable-next-line no-console
console.warn(`The 'reqHandler' export in 'server.ts' is either undefined or does not provide a recognized request handler. ` +
'Using the internal SSR middleware instead.');
fallbackWarningShown = true;
}
angularSsrInternalMiddleware ??= createAngularSsrInternalMiddleware(server, indexHtmlTransformer);
angularSsrInternalMiddleware(req, res, next);
return;
}
if (cachedAngularAppEngine !== AngularAppEngine) {
AngularAppEngine.ɵallowStaticRouteRender = true;
AngularAppEngine.ɵhooks.on('html:transform:pre', async ({ html, url }) => {
const processedHtml = await server.transformIndexHtml(url.pathname, html);
return indexHtmlTransformer?.(processedHtml) ?? processedHtml;
});
cachedAngularAppEngine = AngularAppEngine;
}
// Forward the request to the middleware in server.ts
if ((0, utils_1.isSsrNodeRequestHandler)(reqHandler)) {
await reqHandler(req, res, next);
}
else {
const webRes = await reqHandler(createWebRequestFromNodeRequest(req));
if (!webRes) {
next();
return;
}
await writeResponseToNodeResponse(webRes, res);
}
})().catch(next);
};
}