speed-limiter.js

const axios = require("axios");

const MAX_REQUESTS_COUNT = 10;
const INTERVAL_MS = 10;
let PENDING_REQUESTS = 0;

const CHROME_USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36";

// create new axios instance
const api = axios.create({
  headers: {
    "User-Agent": CHROME_USER_AGENT,
  },
});

/**
 * Axios Request Interceptor
 */
api.interceptors.request.use(
  (config) =>
    new Promise((resolve) => {
      let interval = setInterval(() => {
        if (PENDING_REQUESTS < MAX_REQUESTS_COUNT) {
          PENDING_REQUESTS += 1;
          clearInterval(interval);
          resolve(config);
        }
      }, INTERVAL_MS);
    })
);

/**
 * Axios Response Interceptor
 */
api.interceptors.response.use(
  (response) => {
    PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1);
    return Promise.resolve(response);
  },
  (error) => {
    PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1);
    return Promise.reject(error);
  }
);

module.exports = api;