Web Crawling vs Web Crawlers: A Comparison of Technical Concepts

Hands-on guide to tell the difference between web crawling and crawlers

Recently, Mr. Zhang wanted to do some e-commerce price monitoring, but he was blocked by the website's IP, and he came to me and asked, "Didn't you say that using a proxy can solve the problem? How can I use a proxy and still get blocked?" In fact, there is a key point here that he didn't understand--Web crawling and web crawlers are not the same thing at allThe proxy strategies used are also very different.

What is the relationship between these two technologies?

To give a tangible example: web crawling is like going to the supermarketBuy only specific items, for example, specializing in staring at Coke prices. Web crawlers, on the other handScan the entire supermarket aisle., not even a mop in the corner. When using ipipgo's Dynamic Residential Proxy, the crawl task is fine with rotating IPs, but the crawler has to use theExclusive proxy + IP pool comboIt's only safe.

How to choose a proxy IP without stepping into a pit?

Last week there is a travel price comparison of customers, using free agents to catch the price of air tickets, the results of the data is so wrong that the parents do not recognize. Later, he changed to ipipgo.Commercial level agentsThe accuracy of the request interval setting tool is 98%. Here is a trick to teach you guys: grabbing with thesession.keep_alive=TrueKeep the session going. The crawlers are going to userandom_delay(1,3)Simulates the operation of a real person.

 Crawl example (Python)
import requests
proxies = {"http": "http://user:pass@gateway.ipipgo.com:3000"}
resp = requests.get("https://目标网站", proxies=proxies)

 Crawler example (Scrapy)
class MySpider(scrapy.)
    custom_settings = {
        'PROXY_LIST': 'https://api.ipipgo.com/proxy_pool'
    }

A practical guide to avoiding the pit

Do not believe that the Internet said "universal anti-anti-crawl program", last year there is a recruiting data friends, according to the tutorial set up!headersIt turned out to be recognized as a crawler. Later on, using ipipgo'sFingerprint Browser Proxy PackageThe problem is solved by emulating both User-Agent and TLS fingerprints as if they were real browsers. Remember three key points: 1) don't use a fixed IP 2) control the frequency of requests 3) change the device fingerprint regularly.

Frequently Asked Questions QA

Q: Do I have to use a proxy to do data collection?
A: It may not be necessary for small-scale crawling, but to do commercial-grade capture, ipipgo'sMega IP PoolYou can effectively avoid banning. Last time, a customer did not listen to advice, their own IP was pulled black even normal business is affected.

Q: How do I choose between a residential agent and a server room agent?
A: If you need high anonymity like price monitoring, use ipipgo's residential agent. Large data volume collection to choose the server room agent, their family recently new on the10Gbps Bandwidth Packageand concurrent requests whoosh.

Q: What should I do if my IP is blocked?
A: Immediately deactivate the current proxy and contact ipipgo customer service for a new IP pool. They have aEmergency Access, as fast as 5 minutes to rebuild the collection environment.

Say something from the heart.

Engage in data collection this line, have seen too many people planted in the agent selection. Last year, there was a double eleven team to do competitive analysis, figure cheap with the pheasant agent, the results of the critical period off the chain. Later changed to use ipipgoBusiness Protection Package, with auto-switching and fail-retry features, ran a solid 10 million requests during 618 this year. Remember: a good agent is not a cost, it's a productive tool that can help you make money.