Crawler request header camouflage techniques in depth analysis

What does crawler request header masquerading actually do?

Crawler old iron must have encountered such a situation: obviously the code is well written, the target site but suddenly give you a face look. At this time do not rush to scold the street, eighty percent is your request header exposed. The request header is like a delivery note, the site through it to see what browser you use, what system in the visit. If all crawlers use the same type of "express list", the site security minutes to pull the black you no matter what.

For example, a brother wrote a crawler in Python, and all the requests ended up with arequests default User-AgentThe website found that tens of thousands of visits per day come from the same "courier". The site found that every day tens of thousands of visits are from the same "courier", direct IP blocking is not negotiable. At this time it is necessary to rely on the request header camouflage + proxy IP two-pronged approach, the crawler dressed up as a real person to visit the same.

How does the proxy IP work with the request header?

The light change armor not change the person is sure to wear gangs, this is a lot of newbies planted place. ipipgo dynamic residential agent just can solve this pain point, their IP pool is updated every day!3 million+ real residential IPsIn conjunction with the random switching of the request header, the site simply can't tell if it's a real person or a program.

ipipgo practical tips open

Recently helped a client do e-commerce price monitoring with ipipgo'sIntelligent Rotation AgentsWith the request header camouflage, it ran continuously for half a month without being blocked. The key is to package the proxy configuration and request header parameters for processing, like this:

First generate the API link in the ipipgo backend, then randomly select a UA before each request in the code, and remember to match the language parameter and time zone parameter. There is a tart operation isMatching languages based on IP locationFor example, a US IP comes with an English language header, and a Japanese IP adds Japanese language parameters for a more realistic disguise.

Avoiding the pitfalls guide and frequently asked questions

QA 1: I've changed my IP and UA, but why am I still blocked?
Check if the cookies are cleaned up, some websites will associate access records with cookies. It is recommended to use a new session object for each request, or enable automatic cookie cleaning in the ipipgo proxy configuration.

QA 2: What about high concurrency scenarios?
That's when it's time for ipipgo'sExclusive agent pool, it is recommended to keep the number of concurrencies to less than 3 per IP per second. Don't be greedy, websites are particularly sensitive to sudden surges in traffic, to simulate random intervals of real people clicking.

QA 3: How do you capture data on mobile?
Replace the UA with a mobile one, such as an iPhone or Android logo. ipipgo's 4G mobile agent comes in handy at this point, and with the mobile-specific network parameters, even base station information can be simulated.

The doorway to choosing a proxy service

There are all sorts of agency services on the market, but not many of them are really reliable. ipipgo convinced me of three things.Real-time monitoring of IP survival timeThe second is to support HTTP/HTTPS/Socks5 full protocol, and the third is to meet the problem of customer service within 10 minutes must return. The last three o'clock in the morning debugging program problems, there are actually technical small brother online support.

Finally give a piece of advice: do not believe that those 9.9 monthly proxy service, this IP is basically a few hundred people share the garbage IP. to engage in serious projects, or have to choose ipipgo this kind of with theQuality Inspection APIThe service provider can check IP availability and response time in real time, which are the core indicators.