node-svgcaptcha

node-svgcaptcha

A npm module to generate a captcha with svg image

How to use:

Install npm package:

npm install node-svgcaptcha

In your code:

app.get('/captcha', function(req, res){

	var captcha = require('node-svgcaptcha');
	var options = {};//Set your configuration in this object
	var genCaptcha = captcha(options);
	
	if(req.session){//save value in session
		req.session.captcha = genCaptcha.captchaValue;
	}
	
	//return svg to render in the browser
	res.set('Content-Type', 'image/svg+xml');
	res.send(genCaptcha.svg);	
});

Options:

  Options that we can pass to the module with the default values:
  
  values: 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' // String with chars to generate random captcha
	length: 8 // lenght of chars in generated captcha
	width: 200 // width of the generated image
	height: 50 // height of the generated image
	color: true // true means that letters are painted in colors and false in gray scale
	lines: 2 // number of lines in the captcha
	noise: 1 // level of noise (points) in the captcha