> For the complete documentation index, see [llms.txt](https://jen-hsuan-hsieh.gitbook.io/javascript-node-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jen-hsuan-hsieh.gitbook.io/javascript-node-js/chapter2-nodejs/28create-free-ssl-for-express-web-server.md).

# 2.8.Create free ssl for express web server

* 1.本篇記錄使用ssl for free (<https://www.sslforfree.com/)申請一個免費的ssl> certificates, 並將它加到node express web server中
* 2.首先必須先要有一個自己的domain name, 並將此domain name輸入到欄位中

![](/files/-M4M0Nl3tKBna7n76ZK9)

* 3.按下按鈕後, 選擇**Manual Verification**

![](/files/-M4M0Nl5Kn9KWBr2zCvW)

* 4.按下**Download File #1**下載verification file

![](/files/-M4M0Nl7x2yfRr6FTC9_)

* 5.在專案根目錄下增加以下路徑:.well-known/acme-challenge
* 6.修改路由(routes/index.js),增加以下程式碼

  ```
    app.get('/.well-known/acme-challenge/<verification file name>', function(req, res, next) 
    {
          res.sendfile('.well-known/acme-challenge/<verification file name>'); 
     });
  ```
* 7.將web server的listen port改為80 port, 啟動時輸入sudo node app.js

  ```
                    app.listen(80);
  ```
* 8.啟動web server, 並按下第5點的連結, 確定web server可下載到verification file, 接著按下**Download SSL Certificate**
* 9.可以下載到一些檔案, 將**certificate.crt**及**private.key**放到專案根目錄下, 並修改app.js

```
                    var privateKey = fs.readFileSync('./private.key', 'utf8');
                    var certificate = fs.readFileSync('./certificate.crt', 'utf8');
                    var credentials = {
                      key: privateKey,
                      cert: certificate
                    };
                    var httpsServer = https.createServer(credentials, app);
                    httpsServer.listen(3000);
```

* 10.重新啟動server即可