@upstash/context7-mcp/dist/lib/log-throttle.js

MCP server for Context7

import { createHash } from "node:crypto";
export function createPerTokenLogWindow(windowMs, maxEntries = 10_000) {
    const entries = new Map();
    return {
        admit(token, now = Date.now()) {
            const key = createHash("sha256").update(token).digest("hex");
            const entry = entries.get(key);
            if (entry && now - entry.loggedAt < windowMs) {
                entry.suppressed += 1;
                return undefined;
            }
            const suppressed = entry?.suppressed ?? 0;
            entries.delete(key);
            while (entries.size >= maxEntries) {
                const oldest = entries.keys().next().value;
                if (oldest === undefined)
                    break;
                entries.delete(oldest);
            }
            entries.set(key, { loggedAt: now, suppressed: 0 });
            return suppressed;
        },
        reset() {
            entries.clear();
        },
    };
}