uptime-kuma/server/rate-limiter.js

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2021-10-23 01:35:13 -07:00
const { RateLimiter } = require("limiter");
const { debug } = require("../src/util");
class KumaRateLimiter {
constructor(config) {
this.errorMessage = config.errorMessage;
this.rateLimiter = new RateLimiter(config);
}
async pass(callback, num = 1) {
const remainingRequests = await this.removeTokens(num);
debug("Rate Limit (remainingRequests):" + remainingRequests);
if (remainingRequests < 0) {
if (callback) {
callback({
ok: false,
msg: this.errorMessage,
});
}
return false;
}
return true;
}
async removeTokens(num = 1) {
return await this.rateLimiter.removeTokens(num);
}
}
const loginRateLimiter = new KumaRateLimiter({
tokensPerInterval: 20,
interval: "minute",
fireImmediately: true,
errorMessage: "Too frequently, try again later."
});
module.exports = {
loginRateLimiter
};