Website Anti-Crawl Breakthrough Guide: Header Rotation and Fingerprint Camouflage Techniques

First, why is the anti-crawler always focusing on your IP?

Engaged in data collection of the old iron should have encountered such a situation: obviously the code is written smoothly, the results just grabbed a few hundred pieces of data on the website neck. This thing, 80% is yournetwork fingerprintIt's a good idea to reveal your identity. Nowadays, websites are like human beings, not only recognize the IP address, but also check your request header, browser characteristics, and even recognize the mouse track!

Second, Header rotation three axes

Let's start with this.request header masquerading asThe doorway. A lot of newbies think they can just fill in a random User-Agent and be done with it, only to be recognized in minutes. You need to have the whole kit and caboodle:

To give a real example: with ipipgo's dynamic residential agent, each request automatically replace the geographical identity. For example, the previous use of Guangzhou Telecom's IP with the Chinese environment, the next cut to Chengdu Mobile IP to change the English request header, so that the anti-climbing system can not feel the law.

III. The invisibility cloak of browser fingerprints

Advanced Anti-Crawl DetectionCanvas Fingerprint,WebGL renderingThese cold parameters. One tawdry operation is to mix random noise into the code when using a headless browser:

// Add random lines to the Canvas canvas
ctx.fillStyle = `rgba(${Math.random()255},${Math.random()255},${Math.random()255},0.2)`;

If it's too much trouble for you, just use ipipgo's.Fingerprint Camouflage Package, their agent nodes are preloaded with 20 browser fingerprint templates, and even the time zone offsets are automatically calibrated.

Fourth, the golden combination of dynamic IP

Focus on how to choose a proxy IP without stepping on potholes:

1. Don't use free proxies on the cheap--Nine out of ten are publicized addresses.
2. Randomization of the length of sessions-It is recommended to change IP every 5-30 minutes.
3. Mixing lines of different carriers--Mixing Telecom, Unicom, and Mobile IPs

I've tested ipipgo.Intelligent Routing FunctionIt can automatically switch the IP type according to the anti-climbing strength of the target website. Ordinary information station with a data center IP to save costs, meet the stringent e-commerce platform second cut residential IP, than the manual switch to save a lot of heartache.

V. Practical guide to avoiding pitfalls

Three common low-level mistakes newbies make:

1. Do the capture with the browser's developer tools on (debug mode will be detected)
2. The request frequency is as precise as a machine (with a random delay, human operation has a shaky hand)
3. All requests use the same export IP (that's why it must be on a proxy)

There is an evil case: a buddy used his company's fixed IP to grab data, and as a result, the entire company's IP segment was blacked out. Later, he switched to ipipgoDedicated Enterprise AgentThe first time I saw this, I was able to get a separate IP pool for each crawler task, and it didn't go wrong again.

[Frequently Asked Questions QA]

Q: Why are I still blocked after changing my IP?

A: It is likely that the browser fingerprint is not handled properly, or the Accept-Encoding parameter in the request header reveals itself. We suggest using ipipgo's debugging tool to check the complete fingerprint.

Q: How many IPs do I need to prepare to be enough?

A: ordinary project 500-1000 / day enough, if you engage in large-scale e-commerce data collection, directly on the ipipgounlimited packageThe test was conducted on 800,000 requests in a single day without triggering a ban.

Q: How do I break the CAPTCHA when I encounter it?

A: Add in the proxy IPlive trafficThe hybrid proxy model of ipipgo can mix crawler requests with live browsing, and has been personally tested to reduce the CAPTCHA trigger rate by 70%.

The last nagging sentence is true: now the anti-climbing technology three months an upgrade, their own solo really better to find a reliable agent service provider. Like ipipgo can provideFull chain counter detection programThe IP resources to the fingerprint library are all wrapped up for you. Wouldn't it be nice to save some time and get some sleep?