32 lines
1.3 KiB
JavaScript
32 lines
1.3 KiB
JavaScript
const express = require('express');
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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 id = crypto.randomUUID();
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const ops = ['+', '-', '\u00d7'];
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const op = ops[Math.floor(Math.random() * ops.length)];
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let a, b;
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if (op === '\u00d7') { a = Math.floor(Math.random() * 9) + 1; b = Math.floor(Math.random() * 9) + 1; }
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else { a = Math.floor(Math.random() * 20) + 1; b = Math.floor(Math.random() * 10) + 1; if (op === '-' && a < b) [a, b] = [b, a]; }
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const answer = op === '+' ? a + b : op === '-' ? a - b : a * b;
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const question = `${a} ${op} ${b} = ?`;
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await query('INSERT INTO captchas(id, question, answer) VALUES (?,?,?)', [id, question, String(answer)]);
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res.json({ id, question });
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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() === 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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