Ví dụ code proxy datacenter: curl, Python, Node.js và Playwright

# HTTP proxy, HTTPS target (CONNECT tunnel)
curl -x http://USERNAME:[email protected]:8000 https://api.ipify.org

# SOCKS5, hostname resolved by the proxy
curl -x socks5h://USERNAME:[email protected]:8000 https://api.ipify.org

# Login passed separately (no URL-encoding needed)
curl -x http://203.0.113.24:8000 -U 'USERNAME:PASSWORD' https://httpbin.org/ip

# IP allowlist: no login
curl -x http://203.0.113.24:8000 https://api.ipify.org

# Show the proxy handshake and the timings
curl -v -s -o /dev/null -w '%{time_connect} %{time_appconnect} %{time_total}\n' \
  -x http://USERNAME:[email protected]:8000 https://example.com

import requests  # pip install requests

# From the line 203.0.113.24:8000:USERNAME:PASSWORD in your account
proxy = 'http://USERNAME:[email protected]:8000'
proxies = {'http': proxy, 'https': proxy}

try:
    response = requests.get('https://api.ipify.org', proxies=proxies, timeout=20)
    response.raise_for_status()
    print('Exit IP:', response.text)
except requests.exceptions.ProxyError as error:
    print('Proxy problem (credentials, port or allowlist):', error)
except requests.exceptions.Timeout:
    print('No answer within 20 seconds')

import requests  # pip install "requests[socks]"

# socks5h: the proxy resolves the hostname. Use the SOCKS5 port shown in your account.
proxy = 'socks5h://USERNAME:[email protected]:8000'
proxies = {'http': proxy, 'https': proxy}

response = requests.get('https://httpbin.org/ip', proxies=proxies, timeout=20)
print(response.json())  # {'origin': '203.0.113.24'}

import requests

# A Session reuses connections: faster for many requests through the same IP.
session = requests.Session()
session.proxies.update({
    'http': 'http://USERNAME:[email protected]:8000',
    'https': 'http://USERNAME:[email protected]:8000',
})
session.headers['User-Agent'] = 'my-monitor/1.0 (contact: [email protected])'

for url in ['https://example.com', 'https://httpbin.org/ip']:
    response = session.get(url, timeout=20)
    print(url, response.status_code, len(response.content), 'bytes')

import asyncio

import aiohttp  # pip install aiohttp (HTTP proxies; SOCKS needs the aiohttp-socks package)

PROXY = 'http://203.0.113.24:8000'
AUTH = aiohttp.BasicAuth('USERNAME', 'PASSWORD')


async def main():
    timeout = aiohttp.ClientTimeout(total=20)
    async with aiohttp.ClientSession(timeout=timeout) as session:
        async with session.get('https://httpbin.org/ip', proxy=PROXY, proxy_auth=AUTH) as response:
            print(await response.json())


asyncio.run(main())

// npm install undici
import { ProxyAgent, fetch } from 'undici';

const dispatcher = new ProxyAgent({
  uri: 'http://203.0.113.24:8000',
  token: `Basic ${Buffer.from('USERNAME:PASSWORD').toString('base64')}`,
});

const response = await fetch('https://api.ipify.org', { dispatcher });
console.log('Exit IP:', await response.text());

// npm install https-proxy-agent socks-proxy-agent
import https from 'node:https';
import { HttpsProxyAgent } from 'https-proxy-agent';
import { SocksProxyAgent } from 'socks-proxy-agent';

const httpAgent = new HttpsProxyAgent('http://USERNAME:[email protected]:8000');
// Use the SOCKS5 port shown in your account; socks5h lets the proxy resolve DNS.
const socksAgent = new SocksProxyAgent('socks5h://USERNAME:[email protected]:8000');

for (const agent of [httpAgent, socksAgent]) {
  https.get('https://api.ipify.org', { agent }, (res) => {
    res.setEncoding('utf8');
    res.on('data', (chunk) => console.log('Exit IP:', chunk));
  }).on('error', (err) => console.error('Proxy error:', err.message));
}

// npm install playwright && npx playwright install chromium
import { chromium } from 'playwright';

const browser = await chromium.launch({
  proxy: { server: 'http://203.0.113.24:8000', username: 'USERNAME', password: 'PASSWORD' },
});
const page = await browser.newPage();
await page.goto('https://api.ipify.org');
console.log('Exit IP:', await page.textContent('body'));
await browser.close();

import statistics
import time

import requests

proxy = 'http://USERNAME:[email protected]:8000'
timings = []
for _ in range(5):
    start = time.perf_counter()
    requests.get('https://example.com', proxies={'http': proxy, 'https': proxy}, timeout=20)
    timings.append((time.perf_counter() - start) * 1000)

print(f'median {statistics.median(timings):.0f} ms over {len(timings)} requests')