Search Engine Crawler Principles: Search Engine Agent Crawler Mechanisms

How do search engine crawlers work?

You can think of the crawler as a 24-hour courier whose daily task is to go door-to-door and collect packages (crawling web pages). However, this courier is a little bit stubborn, if the owner of the site found it knocking on the door frequently (high-frequency visits), it may directly pull the blacklist. This is where the courier needs to be prepared with a few sets ofprops(Proxy IP) to make the site think it's being accessed by a different visitor.

Why do crawlers have to use proxy IPs?

Say a real case: last year, a friend of the e-commerce business, their own program did not hang the proxy directly to capture data, the results of three days on the target site blocked the server IP, even the normal business are affected. There are three main benefits of using proxy IP:

1. Avoiding real IPs from being blocked as "darkroom professionals".
2. Ability to simulate access by users from different regions (e.g., capture localized content)
3. Multiple IPs in rotation directly doubles efficiency

Proxy IP Selection Guide to Avoid Pitfalls

There are three common types of agents on the market, take usipipgoof the package to give a chestnut:

• Dynamic residential (standard) → suitable for novices to test the water
• Dynamic housing (business) → Choose this one if you need to stabilize long-term use.
• Static Residence → Essential for doing account operations

focus onIP purityrespond in singingresponsivenessSome of the cheap proxy IP pools are stuffed with used IPs, and that's a lot of money to spend.

Hands-On Proxy Configuration

In the case of the Python crawler, for example, only three lines of code need to be added with the requests library:

import requests

proxies = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:端口',
    'https': 'http://用户名:密码@gateway.ipipgo.com:端口'
}
response = requests.get('destination URL', proxies=proxies)

Note that you have to change IP regularly, it is recommended to set 30-60 minutes to switch automatically. ipipgo's API supports extraction by volume, so you don't have to maintain your own IP pool.

Frequently Asked Questions First Aid Kit

Q: What should I do if I use a proxy and still get blocked?
A: Check whether the IP quality is not good, change to ipipgo static residential IP try, this kind of IP are home broadband resources, better camouflage.

Q: How do you mess with needing different country IPs?
A: in ipipgo background selection of national nodes on the line, they have 200 + national resources. There is a cold knowledge: to catch Southeast Asian websites, priority selection of Malaysia nodes, the local network infrastructure is better.

Q: How do I choose a package with a limited budget?
A: Buy Dynamic Residential Standard Edition for testing first, and switch to Enterprise Edition after business stabilization. There is a money-saving trick: the traffic fee is cheap from 12:00 pm to 8:00 am, you can set up timed tasks.

Why do you recommend ipipgo?

I've been using my own product for over two years, so I'll tell you a few real-life experiences:
1. Encountered CAPTCHA problems to customer service, directly to do a customized program
2. 3 am debugging program found that the IP is not enough, API second response
3. The last time I tried to catch a Turkish website, I was surprised to find a residential IP address in a small local city.
Now newcomers use the Dynamic Residential Standard Edition, which runs 1G of traffic for over $7, enough to grab tens of thousands of web pages. Enterprise users remember to pick the $9.47/GB package with IP quality assurance.

One final note: Being a crawler is all aboutSustainable development, don't crash the site. Set a reasonable frequency of visits, coupled with a reliable proxy IP, in order to catch the data of a long stream. When you encounter a particularly difficult website, you can directly go to ipipgo's customized solution, which is much more worry-free than tossing it by yourself.