fast-cli/distribution/api.js

Test your download and upload speed using fast.com

import { isDeepStrictEqual } from 'node:util';
import puppeteer from 'puppeteer';
import { delay } from 'unicorn-magic';
async function* monitorSpeed(page, options) {
    let previousResult;
    while (true) {
        // eslint-disable-next-line no-await-in-loop, @typescript-eslint/no-loop-func
        const result = await page.evaluate(() => {
            const $ = document.querySelector.bind(document);
            return {
                downloadSpeed: Number($('#speed-value')?.textContent),
                uploadSpeed: Number($('#upload-value')?.textContent),
                downloadUnit: $('#speed-units')?.textContent?.trim(),
                downloaded: Number($('#down-mb-value')?.textContent?.trim()),
                uploadUnit: $('#upload-units')?.textContent?.trim(),
                uploaded: Number($('#up-mb-value')?.textContent?.trim()),
                latency: Number($('#latency-value')?.textContent?.trim()),
                bufferBloat: Number($('#bufferbloat-value')?.textContent?.trim()),
                userLocation: $('#user-location')?.textContent?.trim(),
                userIp: $('#user-ip')?.textContent?.trim(),
                isDone: Boolean($('#speed-value.succeeded') && $('#upload-value.succeeded')),
            };
        });
        if (result.downloadSpeed > 0 && !isDeepStrictEqual(result, previousResult)) {
            yield result;
        }
        if (result.isDone || (options && !options.measureUpload && result.uploadSpeed)) {
            return;
        }
        previousResult = result;
        // eslint-disable-next-line no-await-in-loop
        await delay({ seconds: 0.1 });
    }
}
export default async function* api(options) {
    const browser = await puppeteer.launch({ args: ['--no-sandbox'] });
    const page = await browser.newPage();
    await page.goto('https://fast.com');
    try {
        for await (const result of monitorSpeed(page, options)) {
            yield result;
        }
    }
    finally {
        await browser.close();
    }
}