http-mw-captcha

Simple & elegant captcha extension for http-mw module. Takes advantage of self initiated session feature of it. Not a cutting edge technology but provides basic protection in two lines without relying on third party services.

Features

• Doesn't rely on third party services.
• Easy to implement
• Random backgrounds
• Random text pos and direction
• Random fonts

Installation

$ npm i http-mw-captcha

It automatically installs http-mw module as a dependency if you don't have it yet.

Usage

const server = require("http-mw");
const captcha = require("http-mw-captcha");

server.listen({
    "port": 8080,
    "webroot": "./public",
    "uploads": "./files"
}, function (req, res) {
    switch (req.method) {
        case "GET":
            switch (req.path[0]) {
                case "captcha":
                    captcha.generate(req, function (data) {
                        res.writeHead(200, {'Content-Type': server.mime("png")});
                        res.end(data);
                    });
            }
            break;
        case "POST":
        switch (req.path[0]) {
            case "verify":
                if (captcha.verify(req, req.payload["code"]) === true) {
                    req.send("code verified");
                } else {
                    req.send("invalid code");
                }
                break;
            default:
                req.deny("undefined endpoint", 404);
        }
    }
}, function (conf) {
    console.log("-- server running on port " + conf.port);
    console.log("-- test url: http://localhost:" + conf.port + "/captcha");
});

Documentation

captcha.generate= function(req,cb); // takes request object and returns raw png buffer as callback captcha.verify(code,req); // takes request object and returns true or false