Creating a Web Crawler: Proxy IP for Massive Data Collection

Teach you to use proxy IP to bypass anti-climbing, data capture is no longer blocked!

Do data collection buddies understand, the most headache is the site's anti-climbing mechanism. Not moving on the IP blocking, so that the collection of tasks halfway. At this time the proxy IP is a lifesaver, but how to use to really work? Today we will break open the rubbing said.

Why does your crawler always get caught?

A mistake that many newbies tend to make:Frantic requests with a fixed IPThe first thing you need to do is to get your hands on a smart monitoring system. Now the website are installed with intelligent monitoring system, the same IP high frequency access immediately triggered the alarm. Last year, a team doing e-commerce price comparison used the company's fixed IP to capture data, and as a result, the entire company's network was blacked out by the target website.

 Error Demonstration (Continuous Requests)
import requests
for page in range(1,100): url = f'{page}'.
    url = f'https://example.com/products?page={page}'
    response = requests.get(url) Repeated requests from the same IP address

The right way to open a proxy IP

There are three hard indicators to look for when choosing an agency service provider:IP Survival Time,Geographical distribution,Protocol Support. Take ipipgo's service as an example, their dynamic residential agent has these advantages:

Real-world configuration (with a guide to avoiding the pitfalls)

Using Python's requests library as an example, configuring ipipgo's proxy takes only two lines of code. But there is one detail to note:The timeout setting must be less than the agent validity periodThe following is an example of a proxy that has a 60-second timeout. Previously, a user set a 60-second timeout, but used a proxy with a 5-minute expiration date, resulting in frequent errors.

 Example of correct configuration
import requests

proxies = {
    'http': 'http://username:password@gateway.ipipgo.com:9020',
    'https': 'http://username:password@gateway.ipipgo.com:9020'
}

response = requests.get('https://target-site.com',
                        proxies=proxies,
                        timeout=25) less than proxy refresh interval

The big picture in acquisition strategy

Don't think that hooking up a proxy is all that matters, request frequency control is the key. It is recommended to useRandomized delays + staggered requestsof combinations. For example, set a random wait of 0.5-3 seconds to avoid whole hours and half hours, which are easy to be monitored.

Frequently Asked Questions QA

Q: What should I do if my proxy IP is slow?
A: Preferred ipipgo'sBGP hybrid lineThe measured latency can be controlled within 200ms. If you do image capture, it is recommended to turn on their TCP acceleration mode.

Q: How do I break the CAPTCHA when I encounter it?
A: ipipgo'sHigh Stash Agent PackageBuilt-in browser fingerprinting camouflage, along with their smart retry strategy, can reduce the CAPTCHA trigger rate of 90%.

Q: Can I use the blocked IP again?
A: Dynamic proxies don't have to worry about this, ipipgo's IP pool rotates automatically every 15 minutes. If a static IP is blocked, submit a work order in their user panel and a new IP will be replaced within 10 minutes.

Sharing of experience in stepping on the pit

When I was helping a financial company with public opinion monitoring last year, I made a low-level mistake:Accept-Encoding in the request header is not set.. Although a proxy was used, the target site recognized the abnormal traffic by the gzip compression feature. It was later resolved by adding random UA and compression parameters under the guidance of ipipgo tech support.

Lastly, I would like to remind you: don't use free proxies for cheap, as those IPs have long been marked by major websites. Professional things to the professional team, like ipipgo this kind of provideAutomatic IP Cleaningrespond in singingRequest Success Rate Monitoringservice provider that can save a lot of debugging time. After all, time is money, and instead of tossing around technical details, you should spend your energy on data analysis.