Crawling: Website Data Collection Techniques

I. Why is crawling data always blocked? You may be missing this tool

Engaged in data collection of the old iron understand, the most headache is the site anti-climbing mechanism. The day before yesterday can be normal running script, the next day suddenly shut down. At this time do not rush to scold, eighty percent of your IP is marked by the site. Here is a real case: an e-commerce company with a fixed IP to catch the price of competing products, the results of the third day was blocked to death, and then changed to theDynamic proxy pool for ipipgo, ran for two months straight without turning over.

Ordinary crawlers are like using the same cell phone number to repeatedly harass people, the site of course, to pull the black you. Proxy IP is equivalent to hundreds of cell phone numbers ready to take turns playing, which is why professional crawlers must be equipped with a proxy. This is why professional crawlers must be equipped with proxies:Highly anonymous proxies are required for high-frequency access, ordinary transparent proxies will be recognized as usual.

Second, hand to teach you how to pick proxy IP

There are all sorts of agency services on the market, so keep these three core metrics in mind:

Special Note: Many newbies will fall into the pit of "concurrency". For example, if a platform claims to have millions of IPs, but only allows 10 concurrency, the actual efficiency may not be as good as ipipgo's 50 concurrency package. When choosing a service, you should look atActual business requirements, don't just look at the propaganda numbers.

III. Practical configuration tutorial (Python version)

Taking the requests library as an example, it teaches you to access the proxy in three steps:

import requests

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

resp = requests.get('destination URL', proxies=proxies, timeout=10)
print(resp.status_code)

Notice two key points here:
1. Must be usedUser Name Password Authenticationway, more secure than IP whitelisting
2. Timeout time is recommended to be set at 8-15 seconds, which is too short for misjudgment.
With ipipgo remember that their ports are9020/9021(corresponding to http/https respectively), make no mistake

IV. A guide for veteran drivers to avoid pitfalls

Name a few blood lessons:
- Don't write a dead proxy address in your code, use therandom pollingThat's the way.
- Don't be so tough when it comes to CAPTCHA, go on the coding platform.
- Higher success rate of collection from 2-5am (less site stress)
- Remember to do the important data.double insurance: Local Storage + Cloud Backup

I have a friend who does opinion monitoring and uses ipipgo.Intelligent RoutingFunction, automatically select the optimal node, the collection efficiency is directly doubled. This feature is their exclusive secret sauce, other families really do not have.

V. Frequently Asked Questions QA

Q: Does proxy IP slow down the speed?
A：好代理反而更快！ipipgo的BGP线路实测比还快，因为走的是专用通道

Q: Can I still use my blocked IP?
A: ipipgo's IPs are all24-hour automatic updateThe lapsed ones will be automatically kicked out of the pool

Q: Which package is appropriate for a small group?
A: Recommendedpay per volumeThe flexibility of the package, use as much as you want, no waste!

Q: Who do I call with technical problems?
A: their technical customer service is really 7 × 24 online, last midnight three o'clock to mention the work order, five minutes on someone back!

VI. Why do you recommend ipipgo?

Real life experience after using it for over three years:
1. One collection of millions of dollars of data for seven consecutive days without disconnection
2. Customer service can be directly connected to the technician, without having to transfer seven or eight times.
3. The price is cheaper than a well-known brand 30%, but the performance is instead stronger
Recently, they had aFree Trial Activities, 5G of free traffic for new users, enough to test small and medium-sized projects.

Finally, to tell the truth: proxy IP this thing a penny a penny, cheap to buy junk proxy, and finally delay the progress of the project is a real loss. Choose ipipgo this kind of stable service provider, out of the problem at least have a professional team pocket.