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angular - Angular Universal 未在路由器插座内呈现内容

问题描述

我正在尝试通过此链接https://angular.io/guide/universal使用 Angular Universal 使用 SSR 渲染我的 Angular 7 应用程序。我以为我可以从那里开始一切工作，因为我能够查看页面源代码并看到呈现到页面的 app.component 内部的所有内容。但是，我无法呈现router-outlet标签内的任何路线

我只是简单地剥离了我的应用程序，以完全按照文档中的说明进行操作。我在那里读到了一些关于确保ModuleMapLoaderModule在 app.server.module 内部的内容，以便延迟加载工作。这确实是 angular-cli 命令的默认设置，所以我不确定发生了什么。

app.server.module

import { NgModule } from '@angular/core';
import { ServerModule } from '@angular/platform-server';
import { ModuleMapLoaderModule } from '@nguniversal/module-map-ngfactory-loader';

import { AppComponent } from './app.component';
import { AppModule } from './app.module';

@NgModule({
  imports: [
    AppModule,
    ServerModule,
    ModuleMapLoaderModule,
  ],
  bootstrap: [AppComponent],
})
export class AppServerModule {}

tsconfig.server.json

  "extends": "./tsconfig.app.json",
  "compilerOptions": {
    "outDir": "../out-tsc/app-server",
  },
  "angularCompilerOptions": {
    "entryModule": "app/app.server.module#AppServerModule"
  }
}

服务器.ts

import 'zone.js/dist/zone-node';
import { enableProdMode } from '@angular/core';
// Express Engine
import { ngExpressEngine } from '@nguniversal/express-engine';
// Import module map for lazy loading
import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';

import * as express from 'express';
import { join } from 'path';

// Faster server renders w/ Prod mode (dev mode never needed)
enableProdMode();

// Express server
const app = express();

const PORT = process.env.PORT || 4000;
const DIST_FOLDER = join(process.cwd(), 'browser');

// * NOTE :: leave this as require() since this file is built Dynamically from webpack
const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main');

// Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
app.engine('html', ngExpressEngine({
  bootstrap: AppServerModuleNgFactory,
  providers: [
    provideModuleMap(LAZY_MODULE_MAP)
  ]
}));

app.set('view engine', 'html');
app.set('views', DIST_FOLDER);

// Serve static files from /browser
app.get('*.*', express.static(DIST_FOLDER, {
  maxAge: '1y'
}));

// All regular routes use the Universal engine
app.get('*', (req, res) => {
  res.render(join(DIST_FOLDER, 'index.html'), { req });
});

// Start up the Node server
app.listen(PORT, () => {
  console.log(`Node Express server listening on http://localhost:${PORT}`);
});

渲染输出

<html lang="en">

<head>
    <base href="/">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- ...Rendered CSS styles... -->
<body>
    <app-root _nghost-sc0="" ng-version="7.2.15">
        <!-- ...Header code that has been rendered... -->

        <router-outlet _ngcontent-sc0=""></router-outlet> <!-- This is where I am expecting the content of the route to be -->

        <!-- ...Footer code that has been rendered... -->
    </app-root>
</body>

</html>

app.routing.module.ts

// Angular Imports

// Pages
// ...Page Imports..

const routes: Routes = [
  { path: '', component: HomePageComponent, pathMatch: 'full' },
  { path: 'events/:id', component: EventDetailPageComponent }, // This is the detail page I am testing with
  { path: 'unknown-error', component: UnknownErrorPageComponent },
  { path: '404', component: NotFoundPageComponent },
  { path: '**', redirectTo: '404' }
];

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forRoot(routes),
  ],
  exports: [
    RouterModule,
  ]
})
export class AppRoutingModule { }

尝试为 Angular 7 找到准确的文档时，我的运气基本上为零，任何帮助将不胜感激！谢谢

标签： angularangular7angular-universaluniversalserver-side-rendering

解决方案

我对服务器端渲染没有任何经验，但是 Angular 应用程序部署到服务器时的一个常见问题是子目录的解析。基本上根会加载，但在通过 url 访问时，角度路由中处理的所有其他项目将不起作用。Web 服务器正在寻找那些物理目录，而不是允许 Angular 路由将页面定向到虚拟目录。如果这听起来像您的问题，这里列出了一些选项

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