https://github.com/georgechan/captchapng

A captcha generator for node.js
https://github.com/georgechan/captchapng

Last synced: 7 days ago
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A captcha generator for node.js

• Host: GitHub
• URL: https://github.com/georgechan/captchapng
• Owner: GeorgeChan
• Created: 2013-08-19T17:20:56.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2023-12-28T03:52:28.000Z (about 1 year ago)
• Last Synced: 2024-12-28T14:13:18.883Z (14 days ago)
• Language: JavaScript
• Size: 5.86 KB
• Stars: 207
• Watchers: 5
• Forks: 35
• Open Issues: 7
• Metadata Files:
  • Readme: README.md

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README

        
#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

```javascript

/**

 * 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');

``