Crawler-specific HTTP proxy: millions of data crawling and anti-anti-crawler strategy efficient program

First, the core pain point of millions of data crawling: why is your crawler always blocked?

Crawlers must have experienced this scenario: the script is running happily, and then suddenly the403, 429 warningsThe first thing you need to do is to add the sleep time and change the request header. Many people's first reaction is to add sleep time, change the request header, and found that the root cause of the problem is not to cure the root cause - in the final analysis.High frequency requests from the same IP is the original sinThe

A real case in point: an e-commerce data team used a fixed IP to catch price information, the first three days went smoothly and flying, and the fourth day was directly recognized by the platform as a robot. They tried to reduce to 1 request per second, the result is still triggered wind control. That's when they realized:The real anti-crawl mechanism is not to look at the frequency, but to look at the IP trajectoryA single IP will be flagged by the algorithm even if the request interval is lengthened. A single IP will still be flagged by the algorithm even if the request interval is stretched, as long as it continues to visit a specific page.

Second, the hidden use of proxy IP: 90% people will not play so

Most people know to use proxy IP to switch the exit address, but in practice it is easy to step on two potholes: either the proxy pool is too small (thousands of IP repeatedly), orMismatch between IP type and business scenario. For example, grabbing domestic content with a data center IP is recognized as server room traffic in minutes.

Here's a tawdry maneuver:Disguising real users with residential IPs. Take ipipgo's real-world data, their 90 million+ residential IPs come from real home broadband, and each request carries the local carrier's ASN information. After a financial data company used this method, the target website for their trafficTrue judgment rate increased from 37% to 89%, the blocking rate went straight to the waist.

Third, the agent pool configuration metaphysics: so that it is not easy to turn over the car

Seen too many people to play the proxy pool into the metaphysics: a complaint that the IP failure fast, a slow response. In fact, the core of the three points:

1. Don't put your eggs in one basket.--Mixed use of different protocols (HTTP/Socks5 rounds)
2. Tagging IPs--Record the success rate, response time of each IP
3. Dynamic elimination mechanism-Kicked out of the pool directly for 3 consecutive failures

Take ipipgo's customer case: a crawler team accessed their API and configured theAuto Fuse Strategy. When the failure rate of a certain batch of IPs exceeds 15%, immediately switch the alternate IP segment. Together with the randomization of the request interval (0.5-3 seconds fluctuation), it is hard to suppress the blocking rate of 5 million requests per day to below 0.7%.

Fourth, the wild ways of the anti-anti-crawl: what you thought was cold knowledge is hot demand

In addition to changing IPs, there are severalHighly overlooked details::
- TLS fingerprint masquerading: some sites detect client-side encryption suites
- Browser environment simulation: WebGL renderer, font list these features
- Spatio-temporal distribution of traffic: don't let request times show a clear machine pattern

I have to brag here about ipipgo'sResidential IP Ecology-- Since IPs come from real home networks, they naturally carry random timestamps and geolocation offsets. A social platform's data collection project empirically found that after using their IPs, the target website's traffic behavior towards theAnomaly detection threshold increased by a factor of 3The

Five, QA time: novice must step on the pit are here!

Q: How long do I have to cool down after getting my IP blocked?
A: The rules vary greatly from platform to platform, but residential IPs are generally reusable after 24 hours, and data center IPs are recommended to be discarded directly.

Q: How to solve the problem of slow proxy IP speed?
A: Prioritize nodes that are physically close (e.g. ipipgo supports filtering by city), and check whether HTTPS encryption is enabled (encryption and decryption will consume time).

Q: How to choose between dynamic and static IP?
A: Static for scenarios that require session continuity (e.g., automated ordering), dynamic for simple data capture is safer.

At the end of the day, the million dollar data crawl is not about who writes the code, it's about theResource Quality and Strategy AdaptationThe next time you encounter anti-climbing don't rush to change the code. Next time you encounter anti-climbing do not rush to change the code, first look at your IP pool is not the time to upgrade - after all, with real residential IP to get things done, is the ultimate solution to combat anti-climbing mechanism.