Next.js Web Crawl: Server-Side Rendering Capture

When Next.js meets those potholes in web crawling

Anyone who has done web crawling knows that server-side rendered sites are like a hard nut to crack. Especially with Next.js site, the regular crawlers often eat the door. This time we have to pull out our killer app - theServer-side acquisition + proxy IPThe combo.

Recently, I helped a friend with an e-commerce price monitoring project, and the target website was made with Next.js. At first, I used the browser automation tool to harden it, and the result was that the IP was blacked out within two days. Later changed to use server-side rendering collection, with theipipgos dynamic agent pool, the collection success rate directly soared from 30% to 95%.

Three great things about server-side acquisition

1. Stealth mode activated: Bypasses browser fingerprinting, like wearing a cloak of invisibility
2. Memory Control Specialist: Save at least 601 TP3T of memory over Puppeteer!
3. Naturally resistant to backward crawling: server-side execution of JS, returning fully rendered HTML

// Next.js server-side capture example
export async function getServerSideProps() {
  const proxyUrl = 'http://user:pass@gateway.ipipgo.com:8080'
  const targetUrl = 'https://目标网站.com'

  const response = await fetch(targetUrl, {
    headers: {'Proxy-Authorization': `Basic ${btoa('user:pass')}`}, agent: new HttpsProxy
    agent: new HttpsProxyAgent(proxyUrl)
  })

  return { props: { data: await response.text() } }
}

Proxy IP Selection Practical Manual

displacement (e.g. of gasoline or diesel fuel)ipipgo's intelligent routing feature that automatically matches the optimal proxy node. TheirFailure Retry MechanismParticularly well suited to handle Next.js' CSR (Client Side Rendering) hybrid architecture, which will automatically retry when it encounters an incomplete page load.

Five tawdry maneuvers to prevent IP blocking

1. Randomly select a User-Agent for each request, don't always use a single identity.
2. Set reasonable intervals between requests, don't request like a jerk!
3. Mixing headless browsers and pure HTTP requests
4. UseipipgoThe automatic IP change function, every 10 requests for a new IP
5. Monitor the response status code and switch channels immediately when 429 is encountered.

Practical QA Triple Strike

Q: What should I do if I always get a blank page when collecting?
A: It's likely that JS is not finished, try adding a 3-second delay after fetch or using theipipgoRendering Agent Service

Q: What should I do if the proxy IP speed is too slow to affect the efficiency?
A: Use ipipgo'shigh speed channelIf you want to use HTTP/2, remember to enable HTTP/2 support in the code, it can speed up 401 TP3T.

Q: How do I break into Cloudflare protection?
A: UpipipgoThe real-life browser fingerprinting agent, in conjunction with their anti-anti-crawler solution, specializes in all kinds of CAPTCHAs

A Guide to Avoiding the Pit (Lessons Learned Through Tears)

Last time, I didn't pay attention to the Accept-Encoding field in the request header, and it was recognized by the target site as abnormal traffic. Later on, I used theipipgoThe request header auto-generation function is the only way to solve the problem. There was also a time when I forgot to handle cookies, which led to the collection of cached pages, a pit we must not step on.

One last tip: thegetStaticPropsDo a timed capture in conjunction with theipipgoThe API dynamically acquires proxies, which ensures data freshness and is not prone to triggering frequency limitations. We have been running this program for a little over half a year, and it's as stable as a batch.