Puppeteer Web Crawl: NodeJS Automation Solution

Hands-on teaching you to use Puppeteer + proxy IP to break through the collection restrictions

The old iron engaged in network crawling should have encountered this situation: just grabbed two pages of data on the website ban IP. this time we have to pull out our masterpiece - theproxy IPThe first thing you need to do is to use the NodeJS automation tool Puppeteer. Today we will use NodeJS automation Puppeteer, with reliable ipipgo proxy service, hand in hand the whole set of anti-blocking program.

Why do I have to use a proxy IP?

For example, you open a bakery (crawler program) and go to the same flour mill (target site) every day to buy goods. The factory manager found that you come every day, directly to the store door for you to lock (block IP). At this time if there are a dozen outlets (different IP) to take turns to purchase, is not it much more stable?

Using ipipgo's pool of proxies is the equivalent of pairing you with thousands of outlet addresses. Here are a few hardcore advantages:

• High-frequency access without revealing (different IPs for each request)
• Breaking through the single geographic limitations (the ability to select export IPs from all over the country)
• Automatic filtering of failed nodes (IPs that don't work are automatically taken offline)

The actual code is written like this

Straight to the dry stuff, the setup for hanging the proxy on startup with Puppeteer. Notice how the parameters are configured:

const puppeteer = require('puppeteer');

async function crawler() {
  const browser = await puppeteer.launch({
    args: [
      '--proxy-server=http://username:password@gateway.ipipgo.com:9020',
      '--no-sandbox'
    ]
  });

  const page = await browser.newPage();
  await page.goto('https://目标网站.com');

  // Do some page manipulation...
  await browser.close(); }
}

Here's the kicker.username:passwordFor this part, ipipgo's user backend can generate authentication information directly. Their proxy address format is unified gateway.ipipgo.com, different ports correspond to different regions of the IP, this point is particularly trouble-free.

Guide to avoiding the pit

A few common problems encountered by newbies:

The correct posture of automatic IP change

To change IPs every time you visit, you have to use ipipgo's dynamic proxy service. Get an IP pool polling in the code, like this:

const ipPool = [
  'gateway.ip ipgo.com:9030',
  'gateway.ip ipgo.com:9031',
  //... More ports
];

function getRandomIP() {
  return ipPool[Math.floor(Math.random() ipPool.length)]; }
}

// Change the IP each time a new browser instance is started
async function createBrowser() {
  return puppeteer.launch({
    args: [`--proxy-server=${getRandomIP()}`]
  });
}

But ipipgo's is more recommendedautomatic rotationpackage, their back-end will automatically switch the export IP, no need to maintain your own IP pool.

QA session

Q: Will I be recognized by the website if I use a proxy IP?
A: It is important to pick the right proxy type. ipipgo's hybrid proxy mixes data center IPs with residential IPs and has a much lower recognition rate than a single type.

Q: Do free proxies work?
A: Newbies can try to practice, but serious projects should not be used. Previously, there is a brother to use free agents, the result of crawling to the data mixed with advertising, you fine.

Q: Do I need to build my own proxy server?
A: Unless it's a bank-level security project, it's more cost-effective to use a ready-made service like ipipgo directly. Their API access is done in 5 minutes, which is much more hassle-free than tossing your own servers.

One final rant, don't just look at price when choosing a proxy service. A service like ipipgo can provideReal-time request success rate monitoringThe, at critical moments can really save lives. After all, the biggest cost of a crawler project is not the agent fee, but the cost of data re-mining after being blocked, don't you think it's the right thing to do?