Scraptcha

Scraptcha provides a method of user validation for submission forms.

var express = require('express');
var scraptcha = require('scraptcha');
 
 // Scraptcha images source information.   
var imageInformation = {path:          __dirname + "/images/green/",
                        filePrefix:    "i_cha_",
                        fileExtension: ".gif"};
 
// Initialize the Scraptcha data.
scraptcha.initialize(imageInformation);
 
// Static file server.
var server = new express();
server.use(express.static(__dirname));
server.listen(8800);
console.log("Server is listening on http://localhost:8800");
 
// Gets the scratcha code sequence. The "id" compensates for a browser update restriction. 
server.get('/scraptcha/:id', function (req, res) {
    res.send(scraptcha.getHTMLSnippet());
});
 
// Returns validation response.
server.get('/scraptchaValidate/:data', function (req, res) {
    res.send(scraptcha.verify(req));    
});

Installation

$ npm install scraptcha

Features

• Image reference code entry
• Base64 image conversion
• Random code digit sizes
• Image digit warp
• Image order scrambling
• Image code verification

Quick Start

Reference files are located in the 'test' folder. Start the example server by navigating to the ./node_modules/scraptcha directory from the command prompt and perform the command "npm start" or "node ./test/file-server.js".

See the 'submit: function(){...}' in the 'main.js' file for end user form adaptation.

Use your own image base by creating a image cache and then edit 'imageInformation{...}' from the above example. Update 'scraptchaCode[...]' in the package 'index.js' file if the code sequence is different.

License

MIT