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angular - Angular 中未使用预渲染

问题描述

我一直在尝试让 Prerender.io 在示例 Angular 6 项目中工作但没有成功。

我成功地通过 Express 为应用程序提供服务，但是页面没有被预呈现。

以下是重要文件（我现在找不到我丢失的文件）：

包.json

{
  "name": "angular-prerender-sample",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build && node server.ts",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.0.3",
    "@angular/common": "^6.0.3",
    "@angular/compiler": "^6.0.3",
    "@angular/core": "^6.0.3",
    "@angular/forms": "^6.0.3",
    "@angular/http": "^6.0.3",
    "@angular/platform-browser": "^6.0.3",
    "@angular/platform-browser-dynamic": "^6.0.3",
    "@angular/router": "^6.0.3",
    "core-js": "^2.5.4",
    "express": "^4.16.3",
    "prerender-node": "^3.2.1",
    "rxjs": "^6.0.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular/compiler-cli": "^6.0.3",
    "@angular-devkit/build-angular": "~0.6.8",
    "typescript": "~2.7.2",
    "@angular/cli": "~6.0.8",
    "@angular/language-service": "^6.0.3",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.3.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1"
  }
}

索引.html

<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <title>AngularPrerenderSample</title>
  <base href="/">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
  <meta http-equiv="Pragma" content="no-cache">
  <meta http-equiv="Expires" content="0">
  <title>winsun - intelligente energielösungen - Steg, Chur, Baar, Vaduz, Schaffhausen, Eischoll</title>
  <meta name="description" content="winsun - intelligente energielösungen in Steg, Chur, Baar, Vaduz, Schaffhausen, Eischoll">
  <meta name="keywords" content="winsun, solar, intelligente energielösungen, energie, sonne, wallis, schweiz, steg, chur, baar, vaduz, schaffhausen, eischoll">
  <base href="/">
  <meta name="twitter:card" content="summary">
  <meta name="twitter:site" content="@winsun_AG">
  <meta name="twitter:title" content="winsun AG">
  <meta name="twitter:description" content="winsun - intelligente energielösungen in Steg, Chur, Baar, Vaduz, Schaffhausen, Eischoll">
  <meta name="twitter:image" content="https://winsun.ch/assets/img/logo.jpg">
  <meta property="og:type" content="website">
  <meta property="og:site_name" content="winsun AG">
  <meta property="og:title" content="winsun AG">
  <meta property="og:description" content="winsun - intelligente energielösungen in Steg, Chur, Baar, Vaduz, Schaffhausen, Eischoll">
  <meta property="og:image" content="https://winsun.ch/assets/img/logo.jpg">
  <meta property="og:url" content="https://winsun.ch">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
</head>

<body>
  <app-root></app-root>
<script type="text/javascript" src="runtime.js"></script><script type="text/javascript" src="polyfills.js"></script><script type="text/javascript" src="styles.js"></script><script type="text/javascript" src="vendor.js"></script><script type="text/javascript" src="main.js"></script></body>

</html>

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule.withServerTransition({
      appId: 'angular-prerender-sample'
    }),
    AppRoutingModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

服务器.ts

const express = require('express');
const path = require('path');

const app = express();
const port = process.env.PORT || 8000;
const project_name = 'angular-prerender-sample';

/* Prerender.io */
const prerender = require('prerender-node').set('prerenderToken', process.env.PRERENDER_TOKEN);
prerender.crawlerUserAgents.push('googlebot');
prerender.crawlerUserAgents.push('bingbot');
prerender.crawlerUserAgents.push('yandex');
app.use(prerender);

/* Serve the static files generated by the CLI (index.html, CSS? JS, assets...) */
app.use(express.static(`${__dirname}/dist/${project_name}`));

app.listen(port, () => {
    console.log(`Starting the server at port ${port}`);
});

任何帮助是极大的赞赏。

标签： angularexpressprerender

解决方案

看起来您使用的是 prerender-node 的 3.2.1 版本，因此您可以删除这些行：

prerender.crawlerUserAgents.push('googlebot');
prerender.crawlerUserAgents.push('bingbot');
prerender.crawlerUserAgents.push('yandex');

这些用户代理默认包含在 v3.2.1 中。

当您运行 server.ts 文件，然后使用 Googlebot 用户代理访问 URL 时，您是否看到返回的预呈现页面？如果您在开发环境中进行测试，则需要运行我们的开源 Prerender 服务器并导出PRERENDER_SERVICE_URL到http://localhost:3000/以便它在本地运行。

你可以在这里找到更多信息：https ://github.com/prerender/prerender

如果您没有看到返回的预呈现页面，那么该 server.ts 文件是否实际上在为每个请求提供 index.html 文件，或者您是否也为您的 API 运行了另一台服务器？

请随时通过 support@prerender.io 给我们发送电子邮件，我们很乐意为您提供帮助！

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