proxy dân cư Node.js theo thành phố Mỹ

import { ProxyAgent, fetch } from 'undici';

const user = 'USERNAME-country-us-state-fl-city-orlando';
const agent = new ProxyAgent({
  uri: 'http://gw.metroproxies.com:7777',
  token: 'Basic ' + Buffer.from(`${user}:PASSWORD`).toString('base64'),
});

const res = await fetch('https://ipinfo.io/json', { dispatcher: agent, signal: AbortSignal.timeout(30000) });
if (!res.ok) throw new Error(`HTTP ${res.status}`);
console.log(await res.json());
await agent.close();

import { ProxyAgent, fetch } from 'undici';

const cities = [['fl', 'orlando'], ['fl', 'tampa'], ['ga', 'atlanta']];

for (const [state, city] of cities) {
  const user = `USERNAME-country-us-state-${state}-city-${city}`;
  const agent = new ProxyAgent({
    uri: 'http://gw.metroproxies.com:7777',
    token: 'Basic ' + Buffer.from(`${user}:PASSWORD`).toString('base64'),
  });
  try {
    const res = await fetch('https://ipinfo.io/json', { dispatcher: agent, signal: AbortSignal.timeout(30000) });
    if (!res.ok) throw new Error(`HTTP ${res.status}`);
    const info = await res.json();
    console.log(city, '->', info.ip, info.city, info.region);
  } catch (err) {
    console.log(city, 'failed:', err.message);
  } finally {
    await agent.close();
  }
}

import { chromium } from 'playwright';

const browser = await chromium.launch({
  proxy: {
    server: 'http://gw.metroproxies.com:7777',
    username: 'USERNAME-country-us-state-fl-city-miami-session-mia01-ttl-15',
    password: 'PASSWORD',
  },
});
const context = await browser.newContext({ timezoneId: 'America/New_York', locale: 'en-US' });
const page = await context.newPage();
await page.goto('https://ipinfo.io/json', { timeout: 60000 });
console.log(await page.textContent('body'));
await browser.close();