captchapng
v0.0.1
Published
A numeric captcha generator for Node.js
Downloads
5,587
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#Captcha PNG generator A numeric captcha generator for Node.js
##Features
- Only generate numeric captcha PNG image
- Build-in fonts
- Characters up and down, left and right limits, random displacement
- Full JavaScript
##Examples
/**
* Captcha PNG img generator
* @Author: George Chan
* @Email: [email protected]
* @Version: 1.0
* @Date: 2013-08-18
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
var http = require('http');
var captchapng = require('captchapng');
http.createServer(function (request, response) {
if(request.url == '/captcha.png') {
var p = new captchapng(80,30,parseInt(Math.random()*9000+1000)); // width,height,numeric captcha
p.color(0, 0, 0, 0); // First color: background (red, green, blue, alpha)
p.color(80, 80, 80, 255); // Second color: paint (red, green, blue, alpha)
var img = p.getBase64();
var imgbase64 = new Buffer(img,'base64');
response.writeHead(200, {
'Content-Type': 'image/png'
});
response.end(imgbase64);
} else response.end('');
}).listen(8181);
console.log('Web server started.\n http:\\127.0.0.1:8181\captcha.png');