npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

captcha-genjs

v1.1.0

Published

Captcha generator with verification by secret key

Downloads

9

Readme

Welcome to Captcha Generator

Unfortunately, there is no Typescript support yet. If you need ES6 types and support, then please contact me, and I will do it. ;)

Initialization:

import CaptchaJs from 'captcha-genjs';

const SECRET = "ABC";
const Captcha = CaptchaJs.create(SECRET);

SECRET is required to sign the response to your captcha. Even if someone finds out your secret key, it will not be possible to find out the answer to the captcha. But the secret key will make it possible to check the correctness of the captcha.

Layout

To create a Canvas layer, you need to call the create Canvas method.

Captcha.createCanvas(150, 50);

We have just created a layer with default values of 50x150px. They are accepted by default, if you do not want to configure your captcha in detail, then using this method makes no sense.

Props

  • width - px: number;
  • height - px: number;
  • alphabet - object;
let alphabet = {
    alphabet: "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789", // for generation
    len: 6 // len generation
};
  • color - hex, rgb: string;
  • size - px: number; font-size

Pay attention.

It is not necessary to transmit data by an object, therefore, if you want to transmit color, you need to transmit width, height and others. This is a temporary measure in future versions in plans to get rid of this ugly design.

Generate captcha

In order to generate a captcha, you need to call the appropriate method. In the method parameters, you can pass the code that will be printed on the layer. If nothing is transmitted, then a random code generated based on your alphabet and length will be printed on the layer.

let result = Captcha.generate();

Props

  • code

Return

  • url: img base64. Can use for src at html.
  • hash: string; An encrypted response to a captcha. Can be use in the client
  • code: string; The code that is printed on the picture. Use it if you need to implement your own validation.
result = {
  url: 'data:image/png;base64,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',
  hash: '4bc73e67641d302164b31d8316e421b89adb45fbb7d90a80dae2f1b5f243bd43',
  code: 'VIO4OV'
}

Validation

console.log(Captcha.checkCode(result.code, result.hash));

Props

  • code the answer to the captcha that came to you from the client
  • hash from generate

Return boolean