st-nodejs-captcha
Creates Captcha in base64 format
installation
npm install st-nodejs-captcha
usage
// import library
var captcha = require("st-nodejs-captcha");
// Create new Captcha
var newCaptcha = captcha();
// Value of the captcha
var value = newCaptcha.value
// Image in base64
var imagebase64 = newCaptcha.image;
// Width of the image
var width = newCaptcha.width;
// Height of the image
var height = newCaptcha.heigth;sample usage with nodejs http
"use strict";
var http = require("http");
var captcha = require("st-nodejs-captcha");
var PORT = 8181;
function handleRequest(req, res) {
if (req.method === "GET" && (req.url === '/' || req.url.indexOf("index") > -1)){
let result = captcha();
let source = result.image;
res.end(
`
<!doctype html>
<html>
<head>
<title>Test Captcha</title>
</head>
<body>
<label>Test image</label>
<img src="${source}" />
</body>
</html>
`
);
}else{
res.end('');
}
}
//Create a server
var server = http.createServer({}, handleRequest);
//Start server
server.listen(PORT, function() {
console.log("Server listening on: https://localhost:" + PORT);
});It is recommended to store the value of the captcha in order to check the validity of the user's answer to challange