lib/limit.js - git - Webernet Explorer
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| 1 | function make(max, windowMs) { |
| 2 | const hits = new Map(); |
| 3 | return function check(key) { |
| 4 | const now = Date.now(); |
| 5 | const arr = (hits.get(key) || []).filter(t => now - t < windowMs); |
| 6 | if (arr.length >= max) { hits.set(key, arr); return false; } |
| 7 | arr.push(now); |
| 8 | hits.set(key, arr); |
| 9 | if (hits.size > 5000) { |
| 10 | for (const [k, v] of hits) { |
| 11 | if (!v.length || now - v[v.length - 1] > windowMs) hits.delete(k); |
| 12 | } |
| 13 | } |
| 14 | return true; |
| 15 | }; |
| 16 | } |
| 17 | |
| 18 | module.exports = { make }; |
| 19 | |
Done
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