Express

时间:2019-02-20 16:57:03

标签: javascript node.js express routing subdomain

我已经使用谷歌搜索了一段时间,但是找不到任何有用的答案。我正在尝试在我的网站api.example.com上获取api的子域。但是,所有答案都表明我需要更改DNS才能将api.example.com重定向到example.com/api,这是我不想要的。是否可以仅投放api.而不是重定向到/api?我将如何去做?

  1. 我正在使用快递。
  2. 我不想使用任何其他非内置软件包。
const path = require('path'),
      http = require('http'),
      https = require('https'),
      helmet = require('helmet'),
      express = require('express'),
      app = express();

const mainRouter = require('./routers/mainRouter.js');

// security improvements
app.use(helmet());

// main pages
app.use('/', mainRouter);

// route the public directory
app.use(express.static('public'));

app.use(/* API subdomain router... */)

// 404s
app.use((req, res) => {
    res.status(404).sendFile(path.join(__dirname, "views/404.html"));
})

2 个答案:

答案 0 :(得分:1)

我建议您使用nginx和单独的api服务。

但是由于某些原因,您无法避免它(或者您不想要它,因为您只想尽快向客户展示原型)。

您可以编写中间件,该中间件将从标头中捕获主机并转发到某些自定义路由器:

1)/middlewares/forwardForSubdomain.js

module.exports = 
    (subdomainHosts, customRouter) => {
      return (req, res, next) => {
        let host = req.headers.host ? req.headers.host : ''; // requested hostname is provided in headers
        host = host.split(':')[0]; // removing port part

        // checks if requested host exist in array of custom hostnames
        const isSubdomain = (host && subdomainHosts.includes(host));
        if (isSubdomain) { // yes, requested host exists in provided host list
          // call router and return to avoid calling next below
          // yes, router is middleware and can be called
          return customRouter(req, res, next); 
        }

        // default behavior
        next();
      }
    };

2)api路由器为例/routers/apiRouter.js

const express = require('express');
const router = express.Router();

router.get('/users', (req, res) => {
  // some operations here
});

module.exports = router;

3)在/处理程序之前附加中间件:

const path = require('path'),
      http = require('http'),
      https = require('https'),
      helmet = require('helmet'),
      express = require('express'),
      app = express();

const mainRouter = require('./routers/mainRouter');

// security improvements
app.use(helmet());

// ATTACH BEFORE ROUTING
const forwardForSubdomain = require('./middlewares/forwardForSubdomain');
const apiRouter = require('./routers/apiRouter');
app.use(
  forwardForSubdomain(
    [
      'api.example.com',
      'api.something.com'
    ],
    apiRouter
  )
);

// main pages
app.use('/', mainRouter);

// route the public directory
app.use(express.static('public'));

// 404s
app.use((req, res) => {
    res.status(404).sendFile(path.join(__dirname, "views/404.html"));
})

P.S。与express-vhost软件包look at the code

中的操作相同

答案 1 :(得分:-1)

绝对可以仅将子域(api.example.com)指向您的api服务器。

DNS不控制子目录,因此example.com/api的DNS条目无效

如果您拥有服务器的IP地址,则需要添加一个值为api.example.com的A记录。

如果您拥有服务器的域名,则需要创建一个CNAME记录。