tormozz48/algebraic-captcha

Generate CAPTCHA from algebraic formula

algebraic-captcha's Issues

Create demo page on gh-pages

Optimize font calibration algorithm

Now it is O(n) but can be changed to Olog(n)

Make equation more hard to automatic solving

Optionally instead of 6 + 4 = ? create something like this: ? + 4 = 10

Error when run in docker node:lts-alpine with nextjs

Error detail:

Error: ENOENT: no such file or directory, open '/fonts/Comismsh.ttf'
    at Object.openSync (fs.js:440:3)
    at Object.readFileSync (fs.js:342:35)
    at Object.loadSync (/app/.next/serverless/pages/api/user/captcha.js:15277:21)
    at Object.<anonymous> (/app/.next/serverless/pages/api/user/captcha.js:2135:23)
    at Object.6HnN (/app/.next/serverless/pages/api/user/captcha.js:2162:30)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Object./RNt (/app/.next/serverless/pages/api/user/captcha.js:344:14)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Object.UTAq (/app/.next/serverless/pages/api/user/captcha.js:41692:16)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Object.ctv8 (/app/.next/serverless/pages/api/user/captcha.js:42800:18)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Object.<anonymous> (/app/.next/serverless/pages/api/user/captcha.js:1331:20)
    at Object.2g5n (/app/.next/serverless/pages/api/user/captcha.js:1347:30)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Object.ONz8 (/app/.next/serverless/pages/api/user/captcha.js:39493:30)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Module.f2QB (/app/.next/serverless/pages/api/user/captcha.js:43242:75)
    at __webpack_require__ (/app/.next/serverless/pages/api/user/captcha.js:23:31)
    at Module.module.exports.o2LP.__webpack_exports__.default (/app/.next/serverless/pages/api/user/captcha.js:48383:26)
    at Server.handleApiRequest (/app/node_modules/next/dist/next-server/server/next-server.js:248:35)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async Object.fn (/app/node_modules/next/dist/next-server/server/next-server.js:195:21)
    at async Server.run (/app/node_modules/next/dist/next-server/server/next-server.js:298:17) {
  errno: -2,
  syscall: 'open',
  code: 'ENOENT',
  path: '/fonts/Comismsh.ttf'
}

Please check it

use svg-captcha for formula drawing

https://www.npmjs.com/package/svg-captcha

Add unit-tests for config module

Add captcha image post processing (optionally)

• rotation
• color manipulation
  ...

Add ability to use custom font

Add option for spread operands vertically

Proof of concept

           = ?
1     2
   +