Captcha
Simple captcha.
Installation
via npm:
$ npm install captcha
Application init:
...
var captcha = require('captcha');
...
app.configure(function(){
...
app.use(app.router);
app.use(captcha('/captcha.jpg')); // url for captcha jpeg
app.use(express.static(__dirname + '/public'));
...
Color Options
You can setup colors with an object, instead of just URL, like this:
...
app.use(captcha({url: '/captcha.jpg', fg:'#0064cd', bg: '#049cdb', interference: '#049cdb'}));
...
All color options are optional, and you should probably set interference to teh same color as fg or bg, to make it harder for bots to read.
Render captcha:
<img src="/captcha.jpg" />
Check captcha:
app.post('/user/create', function(req, res, next){
if(req.body.captcha != req.session.captcha) // text from captcha stored into session
return next(new Error('Captcha stop!'));
...
PS: thanks for more detailed description: http://stackoverflow.com/questions/9487844/nodejs-how-to-use-node-captcha-module
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