22 lines
554 B
TypeScript
22 lines
554 B
TypeScript
import { execFile } from "node:child_process";
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import LRUCache from "lru-cache";
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const cache = new LRUCache({
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max: 500,
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ttl: 1000 * 60 * 5,
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});
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export default async function bgpq4(asSet: string): Promise<number[]> {
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if (cache.has(asSet)) return cache.get(asSet) as number[];
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const answer: { as: number[] } = await new Promise((resolve) => {
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execFile("bgpq4", ["-tjl", "as", "-L", "6", asSet], (error, stdout) => {
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if (error) {
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throw error;
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}
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resolve(JSON.parse(stdout));
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});
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});
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cache.set(asSet, answer.as);
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return answer.as;
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}
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