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Nodejs implements a super simple method to generate QR codes

亚连Original: 2018-05-29 16:37:402555browse

This article mainly introduces the method of nodejs to achieve super simple generation of QR codes, and analyzes the related operation skills of nodejs based on the qr-image plug-in to generate QR codes in the form of examples. Friends in need can refer to it

The example in this article describes how nodejs implements a super simple method of generating QR codes. Share it with everyone for your reference, the details are as follows:

Use node-qrcode (https://github.com/soldair/node-qrcode) at the beginning, but you need to install it during the installation. python, and does not support python3.0 or above. When installing python2.0, you need to install other environments, so I gave up.

Finally chose a niche plug-inqr-image（https://github.com/alexeyten/qr-image）

The front page is as follows

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>

Backend code:

routes/index.js

var qr = require(&#39;qr-image&#39;)
router.get(&#39;/&#39;, function (req, res, next) {
  res.render(&#39;index&#39;, {title: &#39;Express&#39;});
});
router.get(&#39;/create_qrcode&#39;, function (req, res, next) {
  var text = req.query.text;
  try {
    var img = qr.image(text,{size :10});
    res.writeHead(200, {&#39;Content-Type&#39;: &#39;image/png&#39;});
    img.pipe(res);
  } catch (e) {
    res.writeHead(414, {&#39;Content-Type&#39;: &#39;text/html&#39;});
    res.end(&#39;<h1>414 Request-URI Too Large</h1>&#39;);
  }
})

Finally Effect

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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