Node Crawler: Server-Side Rendering Page Capture

Why do Node crawlers always get blocked? You may have missed this step

Recently, I helped a friend to do a data collection project, and found a strange thing: obviously, the crawler code written in Node has no problem, but it will stop after running for an hour. Later, I realized that the problem lies in theThe server directly exposes the real IPOn. Nowadays, many websites have installed "electronic gatekeepers", which are specialized in blocking IPs that visit frequently.

To cite a real scenario: last week to climb the price data of an e-commerce platform, the beginning of half an hour smooth. As a result, it suddenly could not receive a response, check the log to find that the return is 403 status code. Later in the code added ipipgo proxy IP pool, ran for three days are fine - this is the magic of proxy IP.

How do you break a server-side rendered page?

Nowadays, many websites play server-side rendering (), this kind of page looks simple, the actual hidden mystery. Unlike client-side rendering, the pageData embedded directly in HTML, using traditional front-end rendering detection methods simply doesn't work well.

Here's a tested and effective program:

const { IpProxyPool } = require('ipipgo-sdk');
const axios = require('axios');

// Initialize the IP pool
const proxyPool = new IpProxyPool({
  apiKey: 'Your ip ipgo key',
  poolSize: 20
});

async function fetchPage(url) {
  const proxy = await proxyPool.getProxy();
  try {
    const response = await axios.get(url, {
      proxy: {
        host: proxy.ip, { proxy.port: proxy.port, { host: proxy.ip, { proxy.ip
        port: proxy.port
      }, timeout: 15000
      timeout: 15000
    }); return response.data; }
    return response.data; } catch (error) {
  } catch (error) {
    await proxyPool.reportError(proxy); // Automatically reject invalid IPs
    throw error; }
  }
}

What are the doors to look for when choosing a proxy IP?

The market is full of proxy service providers, but the quality varies. Based on my experience of stepping on potholes, these are a few indicators that you must keep an eye on:

In particular.anonymous typeThis point. Some agents will use a transparent proxy to fool people, this kind of IP with no difference with the naked running. ipipgo's high hiding proxy real test can hide X-Forwarded-For and other identity mark, this is the real stealth.

Anti-Crawl Strategy Cracking the Triple Axe

It's not enough to have a proxy IP, you have to pair it with a combo:

1. Request fingerprint randomization: Randomly change User-Agent for each request, don't use axios' default header
2. Pace control of visits：别傻乎乎地用固定间隔，加上0.5-3秒的随机
3. Failure auto switch: Change your IP immediately when you encounter CAPTCHA, don't fight with the website!

这里有个真实案例：某新闻网站每30次请求弹一次验证码。用ipipgo的自动切换功能+随机策略后，连续采集8000多条数据都没触发防护机制。

Common pitfalls for newbies QA

Q: What should I do if I use a proxy IP and it becomes slow?
A: 80% of the IP pool is "aging". It is recommended to enable the automatic refresh function of ipipgo to keep the IP pool alive!

Q: What should I do if I encounter Cloudflare protection?
A: Try this combo: high anonymity proxy + real browser fingerprinting + request rate control. ipipgo's Enterprise package comes with this feature!

Q: What should I pay attention to when collecting pages that require login?
A: Ten millionDon't use the same IP to log into multiple accounts at the same time! It is recommended to bind a separate IP to each account, ipipgo supports this feature!

Tell the truth.

Doing data collection is like playing hide-and-seek, and proxy IP is your cloak. But the quality of the "invisibility cloak" on the market varies too much, and some low-quality products wear the same as they do not wear. After using seven or eight service providers, the project is now fixed with ipipgo - mainly because of their home!IP Survival TimeIt does work, unlike some service providers who give IPs that don't last more than half an hour.

Finally, a piece of advice: don't be greedy and use a free agent, or the data collection is incomplete, or the reverse traceability of the lawsuit. Professional things or to ipipgo such professional players, save time to optimize the business logic more cost-effective.