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Nodejs generates QR code (the simplest)

php中世界最好的语言
Release： 2018-05-10 14:17:44
Original
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这次给大家带来nodejs生成二维码（最简洁），nodejs生成二维码的注意事项有哪些，下面就是实战案例，一起来看一下。

一开始使用node-qrcode（https://github.com/soldair/node-qrcode），结果安装的时候需要安装python，且不支持python3.0以上，安装python2.0的时候又需要安装其他的环境，所以放弃了。

最后选择了一个小众的插件qr-image（https://github.com/alexeyten/qr-image）

前台页面如下

views/index.ejs

<!DOCTYPE html>
<html>
<head>
  <title><%= title %></title>
  <link rel=&#39;stylesheet&#39; href=&#39;/stylesheets/style.css&#39;/>
</head>
<body>
<h1><%= title %></h1>
<img src="/create_qrcode?text=http://blog.csdn.net/fo11ower"/>
</body>
</html>
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后端代码：

routes/index.js

var qr = require('qr-image')
router.get('/', function (req, res, next) {
  res.render('index', {title: 'Express'});
});
router.get('/create_qrcode', function (req, res, next) {
  var text = req.query.text;
  try {
    var img = qr.image(text,{size :10});
    res.writeHead(200, {'Content-Type': 'image/png'});
    img.pipe(res);
  } catch (e) {
    res.writeHead(414, {'Content-Type': 'text/html'});
    res.end('<h1>414 Request-URI Too Large</h1>');
  }
})
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