搭建微服务器:express+https+api代理

时间:2022-03-01 19:48:14

概述

最近打算玩一下service worker,但是service worker只能在https下跑,所以查资料自己用纯express搭建了一个微服务器,把过程记录下来,供以后开发时参考,相信对其他人也有用。

参考资料:express官方文档

http服务器

首先我们用express搭建一个http服务器,很简单,看看官方文档就可以搭建出来了。代码如下:

// server.js
const express = require('express');
const http = require('http'); const app = express();
const PORT = 7088; // 写个合理的值就好
const httpServer = http.createServer(app); app.get('/', function (req, res) {
res.send('hello world');
}); httpServer.listen(PORT, function () {
console.log('HTTPS Server is running on: http://localhost:%s', PORT);
});

加入到项目中

我们的理想状况是,在项目目录下建立一个server文件夹,然后在server文件夹里面启动服务器,加载项目目录下的dist文件夹。

所以我们加入代码解析静态资源:

// server.js
const express = require('express');
const http = require('http'); const app = express();
const PORT = 7088; // 写个合理的值就好
const httpServer = http.createServer(app); app.use('/', express.static('../dist')); httpServer.listen(PORT, function () {
console.log('HTTPS Server is running on: http://localhost:%s', PORT);
});

加入https

我们想把http变成https,首先我们要生成本地证书

brew install mkcert
mkcert localhost 127.0.0.1 ::1

上面的代码意思是说,先安装mkcert,然后用mkcert给localhost,127.0.0.1和::1这三个域名生成证书。

然后我们可以在文件夹下面看到2个文件:

秘钥:example.com+3-key.pem
公钥:example.com+3.pem

我们在钥匙串里面把公钥添加信任。方法可参考:在Vue里用Service Worker来搞个中间层(React同理)

添加完之后我们把秘钥和公钥放在certificate文件夹,然后添加到credentials.js文件中,我们通过这个文件引入秘钥和公钥:

// credentials.js
const path = require('path');
const fs = require('fs'); // 引入秘钥
const privateKey = fs.readFileSync(path.resolve(__dirname, './certificate/example.com+3-key.pem'), 'utf8');
// 引入公钥
const certificate = fs.readFileSync(path.resolve(__dirname, './certificate/example.com+3.pem'), 'utf8'); module.exports = {
key: privateKey,
cert: certificate
};

最后我们把http变成https,并且引入秘钥和公钥:

// server.js
const express = require('express');
const https = require('https');
const credentials = require('./credentials'); const app = express();
const SSLPORT = 7081; // 写个合理的值就好
const httpsServer = https.createServer(credentials, app); app.use('/', express.static('../dist')); httpsServer.listen(SSLPORT, function () {
console.log('HTTPS Server is running on: https://localhost:%s', SSLPORT);
});

设置api代理

在项目中,我们经常遇到跨域问题,在开发时我们是通过devServer的proxyTable解决的,而proxyTable在打包后是无效的。所以我们需要在服务器上面代理api请求。代码如下:

// proxy.js
const proxy = require('http-proxy-middleware'); const authApi = 'your-authApi-address';
const commonApi = 'your-commonApi-address'; module.exports = app => {
app.use('/api/auth', proxy({
target: authApi,
changeOrigin: true,
pathRewrite: {
'/api/auth': '/auth'
},
secure: false,
})); app.use('/api/common', proxy({
target: commonApi,
changeOrigin: true,
pathRewrite: {
'/api/common': '/api'
},
secure: false,
}));
};

写法和devServer里面是一样的,因为devServer底层也是通过express实现的。

然后我们在server.js里面引入上面写的代理:

// server.js
const express = require('express');
const https = require('https');
const setProxy = require('./proxy');
const credentials = require('./credentials'); const app = express();
const SSLPORT = 7081; // 写个合理的值就好
const httpsServer = https.createServer(credentials, app); app.use('/', express.static('../dist')); setProxy(app); httpsServer.listen(SSLPORT, function () {
console.log('HTTPS Server is running on: https://localhost:%s', SSLPORT);
});

最后

最后我们把server.js,credentials.js和proxy.js放在一起就好了啦!

用法:只需要把整个文件夹放到项目目录,在里面运行下面的指令就好了:

yarn i
node server.js

详细代码可以参考我的github