通用 i18n 服务器端 [英] Universal i18n server-side

问题描述

我正在尝试将 Universal 与 i18n 结合使用.
我已经在构建应用程序并设置服务器配置，这样一旦应用程序进入浏览器端模式，用户就会被重定向到应用程序的正确翻译，这很好.

I'm trying to use Universal with i18n.
I'm already building the app and setting the server config so that once the app passes to browser-side mode the user is redirected to the correct translation of the app, that is fine.

我遇到的问题在于服务器端渲染.
以express server的设置方式，我看不到如何提供通用的服务器端正确翻译，只显示默认语言而不是本地语言.
与浏览器端一样，我尝试为服务器端模式使用的 main.bundle 文件创建不同的版本，每种语言一个.问题是，我不能为每个应用设置多个文件.

The issue I'm having is in the server-side rendering.
With the way that the express server is set, I don't see how to provide the universal's server-side correct translation, and only the default language is being displayed instead of the local one.
Like with browser-side, I tried to have a different builds, one for each language, for the main.bundle file used by the server-side mode. Problem is, I can't set more than one of those files per app.

Dist 文件夹结构:

Dist folder structure:

dist/
  server.js
  browser/
    en/
      ...
    it/
      ...
  server/
    en/
      ...
      main.bundle // eng translation
    it/
      ...
      main.bundle // ita translation

server.ts 文件

server.ts file

// * NOTE :: leave this as require() since this file is built Dynamically from webpack
// In this line I can only provide one file for the server-side translation,
// and I can't dynamically change it to the correct translation.
const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = 
require("./dist/server/en/main.bundle"); 

app.engine("html", ngExpressEngine({
    bootstrap: AppServerModuleNgFactory,
    providers: [
        provideModuleMap(LAZY_MODULE_MAP),
    ],
}));

服务器端应用程序从第四行的 main.bundle 渲染.但是，我无法为每个翻译提供一个，我该如何解决?
我的观点是让 Angular Universal 为应用程序提供正确的服务器端翻译.

The server-side app is rendered from the main.bundle in the fourth line. However I don't get the possibility to provide one for each translation, how can I fix that?
My point is having Angular Universal provide the correct server-side translation of the app.

推荐答案

我假设您的网址对于所有英文站点(/en/"作为基础)构建为/en/sample"，为您的网站构建为/sample"意大利语站点(默认，基/").如果此假设不正确，请根据您的需要调整此代码.基本上，您想构建两个单独的引擎，并根据调用的 url 使用正确的引擎.

I assume your urls are build like "/en/sample" for all english sites ("/en/" as base) and "/sample" for your italian sites (default, base "/"). If this assumption is incorrect adjust this code to your needs. Basically you want to build two seperate engines and use the correct one depending on the called url.

// import your bundles
const itBundle = require('./dist/server/it/main.bundle');
const enBundle = require('./dist/server/en/main.bundle');

// define your engines for it and en
// id is needed to find the path
// base is for routing see below
const languageEngines = [{
  id: 'en',
  base: '/en/',
  engine: ngExpressEngine({
    bootstrap: enBundle.AppServerModuleNgFactory,
    providers: [provideModuleMap(enBundle.LAZY_MODULE_MAP)]
  })
},
{
  id: 'it',
  base: '',
  engine: ngExpressEngine({
    bootstrap: itBundle.AppServerModuleNgFactory,
    providers: [provideModuleMap(itBundle.LAZY_MODULE_MAP)]
  })
}];

// Load your engine
app.engine('html', (filePath, options, callback) => {
  options.engine(
    filePath,
    { req: options.req, res: options.res},
    callback
  )
});

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

// handle en file routes
app.get('/en/*.*', express.static('./dist/browser'));
// file routes for it
app.get('*.*', express.static('./dist/browser/it'));

// handle routes for each language
languageEngines.forEach(languageEngine => {
  app.get(`${languageEngine.base}*`, (req, res) => {
    res.render(`./dist/browser/${languageEngine.id}/index.html`, {
      req,
      res,
      engine: languageEngine.engine
    })
  })
});

如果您有任何问题，请随时提出.

If you have questions feel free to ask.

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