Captcha

Simple captcha for Connect/Express.

Installation

Via npm:

$ npm install express-captcha

Usage (for Express 3)

``javascript
var express = require('express');
var captcha = require('express-captcha');

var app = express();

app.configure(function(){
app.use(express.bodyParser());
app.use(express.cookieParser());
app.use(cookieSession({ secret: 'secretkeyhere' }));
app.use(captcha({ url: '/captcha.jpg', color:'#000', background: '#f6f6f6' })); // captcha params
});

app.get('/', function(req, res){
res.type('html');
res.end('

'); // captcha render
});

app.post('/login', function(req, res){
res.type('html');
res.end('CONFIRM: ' + (req.body.digits == req.session.captcha)); // captcha verify
});

app.listen(8000);
console.log('Web server started.');
`

Full list of parameters

`javascript
var params={
"url":"/captcha.jpg",
"color":"#ffffff",// can be omitted, default 'rgb(0,100,100)'
"background":"#000000",// can be omitted, default 'rgb(255,200,150)'
"lineWidth" : 2, // can be omitted, default 8
"fontSize" : 40, // can be omitted, default 80
"codeLength" : 6, // length of code, can be omitted, default 6
"canvasWidth" : 150,// can be omitted, default 250
"canvasHeight" : 100,// can be omitted, default 150
}
app.use(captcha(params)); // captcha params
``