What is a crawler search engine: search engine crawler principle

What is a crawler search engine? Read on to find out.

To put it bluntly, a crawler search engine is like a 24-hour "data mover". Its daily work is to open a myriad of branches, one by one to visit the web page to move the content back to their own warehouse. However, these spinoffs are often used by webmasters as a "thief" defense, this time to rely on proxy IP to the spinoffs!change of armorUp.

Why do crawlers always get banned? We need to get to the bottom of this.

There are three main features to look for in a website against crawlers:

1. repeated visits to the same IP (like always wearing the same clothes to commit crimes)
2. access frequency is not like a person (machine hand speed reveals the identity)
3. Pick sensitive data to catch (straight to the safe is too obvious)

Take the e-commerce price comparison, if you use your own broadband to capture data, within half an hour will be blocked. At this time with ipipgo's proxy IP pool, each visit to a new IP, just like every day to change different clothes to go out, the site can not be recognized.

The right way to open a proxy IP

Here is a real-world case: a price comparison platform with ordinary IP to catch data, the results of every 30 times to be blocked. After changing to ipipgo's rotating IP program, it works continuously for 8 hours without any problem. Specific configuration see this:

import requests

proxies = {
    'http': 'http://ipipgo-rotate:密码@gateway.ipipgo.com:9020',
    'https': 'http://ipipgo-rotate:密码@gateway.ipipgo.com:9020'
}

response = requests.get('Target site', proxies=proxies, timeout=10)

Take care to set up a reasonablerequest intervalIt is recommended to do it once in 3-5 seconds, too fast even if you change your IP will be suspected.

What are the doors to look for when choosing a proxy IP?

Frequently Asked Questions

Q: Is it illegal to use a proxy IP?
A: As long as you don't grab personal privacy and don't do any damage, decent commercial data collection is perfectly legal. ipipgo all IPs are vetted for strict compliance.

Q: Why do I sometimes still get blocked after changing my IP?
A: It may be that the browser fingerprint is exposed, remember to randomize the User-Agent settings, recommended to use fake_useragent library.

Q: How long does ipipgo's IP last?
A: Dynamic IP is replaced automatically for each request, and static IP is available for 24 hours at most. It is recommended to use dynamic for data collection and static for login operation.

Practical tips to share

I recently had a client who does travel price comparison and used ipipgo'surban positioningThe features are particularly interesting. For example, to catch the price of a hotel in different regions, you can specify the geographic location of the proxy IP, so that you get the real local offer, will not be killed by the site.

In short messing with crawlers is like playing hide and seek, the key is toHide well and run fast.The following is a list of the most important things that you can do. Using a good proxy IP this "invisibility cloak", not only to ensure the efficiency of data collection, but also to avoid being pulled by the target site black. Especially like ipipgo this big IP pool service provider, basically can solve the 90% IP blocking problem.