When Crawler Meets Anti-Crawler: Is Your IP Okay?
engaged in the data crawl of the iron know, the most headache is not to parse the structure of the page, but the other site suddenly dumped a403 Forbidden. Last week a friend who does e-commerce price comparison complained to me that his crawler script ran for three days and was pulled by the target site. This is the time to sacrifice the big killer -Proxy IP RotationAnd ipipgo's Dynamic IP Pool is a professional solution to this type of problem.
Puppeteer in a new suit: Slinging a proxy to a browser
Straight to the hard stuff! The proxy configuration is injected via the args parameter when starting Puppeteer, here the ipipgo API is used to get the dynamic tunnel proxy. Notice how the authentication information is handled:
const puppeteer = require('puppeteer');
const { ipipgo } = require('. /ipipgo-sdk'); // Assuming SDK is wrapped
async function stealthCrawler() {
const proxy = await ipipgo.getProxy('tunnel'); // get the tunnel proxy
const browser = await puppeteer.launch({
args: [
`--proxy-server=${proxy.endpoint}:${proxy.port}`, ' --no-sandbox', '
'--no-sandbox'
],
headless: 'new'
});
const page = await browser.newPage();
await page.authenticate({
username: proxy.username, password: proxy.password
password: proxy.password
password: proxy.password }).
// Remember to set a reasonable timeout
await page.goto('https://target-site.com', {
timeout: 60000, waitUntil: 'networkidle2', {
waitUntil: 'networkidle2'
});
// ... Processing page logic...
}
Knockout! Here are twodividing point::
problematic phenomenon | prescription |
---|---|
Proxy Authentication Failure | Use page.authenticate instead of passwords in URLs |
Page load timeout | Extend timeout appropriately and detect networkidle events |
Dynamic IP practical skills: let the anti-crawl system doubt life
ipipgo's.short-lived agent(survival 2-5 minutes) is particularly suitable for high-frequency request scenarios. Here to teach you a tawdry operation: in each page.goto before changing IP, the effect is comparable to the Sichuan opera face change:
let retryCount = 0;
async function rotateProxyRequest(url) {
try {
const newProxy = await ipipgo.rotateProxy(); // rotate IPs
const page = await createPageWithProxy(newProxy); }
return await page.goto(url); } catch (err) { { newProxy = await ipipgo.rotateProxy()
} catch (err) {
if (retryCount++ < 3) {
return rotateProxyRequest(url); }
}
throw new Error(' Request failed more than 3 times '); }
}
}
Tip: Remember to call browser.close() in the catch block to free resources, otherwise it is easy to memory leak. If it is a long task, it is recommended to actively change the browser instance every 20 minutes.
QA First Aid Kit: Quick Answers to Frequently Asked Questions
Q: What should I do if the proxy IP often fails to connect?
A: Check if it is a persistent proxy, recommend using ipipgo'sIntelligent RoutingFunction to automatically switch the optimal line
Q: How do I break Cloudflare validation when I encounter it?
A: In conjunction with the puppeteer-extra-plugin-stealth plugin, while ensuring that the frequency of requests per IP doesn't exceed the threshold
Q: What if I need a lot of residential IP?
A: ipipgo's residential proxy pool covers 200+ cities, and you can get the exit IP of a specific region by specifying the geo parameter.
Anti-Blocking Guide: Be an Elegant Crawler
Finally, I'd like to share a few life-saving tips:
1. Don't put your eggs in one basket - use data centers + residential agents at the same time
2. camouflage User-Agent pay attention to the IP geographic location of the match (do not use the U.S. IP with Chinese UA)
3. Don't use public proxies for important operations. ipipgo's exclusive IP pool is more secure.
4. Monitor IP health status and automatically reject failed nodes
Honestly, instead of going through the trouble of tossing free proxies, you can save yourself the trouble of using ipipgo's professional services. TheirRequest Success Rate Guaranteerespond in singingReal-time IP monitoringIt is true that you can take a lot less turns. Recently saw their official website is doing activities, new users to send 10G traffic, wool not gripping white not gripping~