36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
const express = require('express');
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const svgCaptcha = require('svg-captcha');
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const crypto = require('crypto');
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const { query } = require('../db');
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const router = express.Router();
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router.get('/', async (req, res) => {
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try {
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await query("DELETE FROM captchas WHERE created_at < NOW() - INTERVAL 5 MINUTE");
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const captcha = svgCaptcha.create({
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size: 4,
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noise: 3,
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color: ['#1e40af','#7c3aed','#be123c','#b45309','#047857','#0f766e','#4338ca','#a21caf','#b91c1c','#3b82f6'],
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background: '#f4f4f4',
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width: 120,
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height: 44,
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fontSize: 40,
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ignoreChars: '0oO1iIl',
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});
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const id = crypto.randomUUID();
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await query('INSERT INTO captchas(id, question, answer) VALUES (?,?,?)', [id, '', captcha.text.toLowerCase()]);
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res.json({ id, svg: captcha.data });
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} catch (e) { res.status(500).json({ error: e.message }); }
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});
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async function verify(id, answer) {
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const rows = await query("SELECT * FROM captchas WHERE id = ? AND created_at > NOW() - INTERVAL 5 MINUTE", [id]);
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if (!rows.length) return false;
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await query('DELETE FROM captchas WHERE id = ?', [id]);
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return String(answer).trim().toLowerCase() === rows[0].answer;
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}
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module.exports = router;
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module.exports.verify = verify;
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