Web Crawler Robot: Automated Data Collection System Setup

Hands-on web crawler bot

The brothers who engage in web crawling know that the biggest headache is to be blocked IP. yesterday also ran a good program, today suddenly stopped, this kind of thing I have seen too much. Today, I will teach you how to use proxy IP to build a ...Robust data acquisition system, focusing on how to use ipipgo's proxy service to break the ice.

Why do I always get my IP blocked by websites?

Many newbies are prone to make three mistakes: ① with their own computer IP hard just ② access frequency like playing machine guns ③ collection law is too neat. This is like wearing the same clothes every day in the supermarket, the same time, take the same goods, the security guard does not stare at you stare at who?

Here's a comparison table for you to see:

Proxy IP Selection with Care

There are three types of agents on the market, let's use the analogy of driving on the road:

• Transparent AgentIt's like driving a private car. Tollbooths recognize it at a glance.
• Anonymous agent: Similar to a car with a set of license plates, the toll booth knows it's a set of license plates but can't find out who owns the car
• High Stash Agents: The equivalent of a professional race car, the toll booths can't even read the markings.

Here's a highlight from ipipgoDynamic residential agent poolTheir IP resources cover 200+ countries and regions, and each request automatically changes the IP, just like playing Sichuan opera face changing. Especially suitable for the need to run data for a long time, I used their services last year to do e-commerce price monitoring, ran for three months without turning over.

Four Steps to a Practical Build

Here's an example of a Python crawler with a few key points:

1. Get the API key in the ipipgo backend, remember to select thedynamic rotation scheme
2. Add a retry mechanism when installing the requests library, it is recommended to use the tenacity library.
3. Note the format when setting up the proxy: http://用户名:密码@gateway address:port
4. 随机别用固定sleep，试试正态分布随机数

Attached is a code snippet (remember to replace the parameters with your own):

proxies = {
    "http": "http://user123:pass456@gateway.ipipgo.net:8000",
    "https": "http://user123:pass456@gateway.ipipgo.net:8000"
}
response = requests.get(url, proxies=proxies, timeout=10)

Frequently Asked Questions QA

Q: What should I do if I keep encountering CAPTCHA?
A: This has to be a combination of ipipgo's IP library + camouflage browser fingerprints + reduce the frequency of collection. Can't really go on coding platforms, but the cost goes up

Q: How to solve the problem of slow proxy IP speed?
A: Switch routes in the ipipgo background, they have a smart routing function. Also check if the target site itself loads slowly, don't let the proxy take the blame!

Q: What can I do if I can't catch all the data?
A: First check whether the IP is restricted, and then use the distributed crawler architecture. ipipgo supports multi-threaded concurrency, different threads with different export IP, this feature is not available in many homes!

Guide to avoiding the pit

Finally, a few lessons learned: ① do not buy cheap junk proxy ② important projects to prepare a backup plan ③ regularly check IP availability. Last month, a brother figure to save money with a free agent, the results collected a bunch of fake data, crying no place to cry.

Now here's a tip if you use ipipgo, theirIP Quality Inspection ToolIt's free. Every time before the collection before running a detection script, the not passable IP kicked out in advance, can save a lot of things. Recently, they also came out with a new feature that can automatically match the optimal IP pool by website domain name, which is really quite practical.