@dash0/sdk-web/dist/modules/utils/rate-limit.js

Dash0's Web SDK to collect telemetry from end-users' web browsers

import { setInterval } from "./timers";
export function createRateLimiter(opts) {
    const maxCalls = opts.maxCalls || 4096;
    const maxCallsPerTenMinutes = opts.maxCallsPerTenMinutes || 128;
    const maxCallsPerTenSeconds = opts.maxCallsPerTenSeconds || 32;
    let totalCalls = 0;
    let totalCallsInLastTenMinutes = 0;
    let totalCallsInLastTenSeconds = 0;
    setInterval(function () {
        totalCallsInLastTenMinutes = 0;
    }, 1000 * 60 * 10);
    setInterval(function () {
        totalCallsInLastTenSeconds = 0;
    }, 1000 * 10);
    return function isExcessiveUsage() {
        return (++totalCalls > maxCalls ||
            ++totalCallsInLastTenMinutes > maxCallsPerTenMinutes ||
            ++totalCallsInLastTenSeconds > maxCallsPerTenSeconds);
    };
}