Crawling the Web with R: Proxy IP to improve collection efficiency

First, why do old drivers love to use proxy IP crawlers?

Engaged in data collection know that the website anti-climbing mechanism is like a neighborhood security check health code. You repeatedly visit the same IP, minutes to give you a blacklist. At this time, the proxy IP is equivalent toTemporary passes that can be exchanged at any time, so that the acquisition program can continue to work.

To cite a real case: there is an e-commerce than the price of the team, originally with a single IP collection, every half hour on the seal. Later changed to use ipipgo's dynamic residential agent, the collection speed directly tripled, the success rate from 30% soared to 95%. this shows that the choice of agent services, than upgrade the server configuration is also useful.

Second, the basic configuration of the R language crawler

Install the necessary packages first, don't just run naked:

 The basic three-piece suite
install.packages("httr")
install.packages("rvest")
install.packages("xml2")

 Proxies
install.packages("proxy")

take note oftimeout settingNever save! It is recommended that connectTimeout be set to 10 seconds to avoid getting stuck:

library(httr)
response <- GET("https://目标网站.com",
           use_proxy("123.45.67.89", port=8080), proxy IP provided by ipipgo
           timeout(10))

Proxy IP practical skills

This is where many newbies fall. Proxy IPs are not just installed and that's it, you have to be strategic:

Special Note: Don't rush to change IP when you encounter 403 error. use this code first to check if the proxy is valid:

test_proxy %
      content() %>%
      print()
  }, error = function(e) message("Proxy failed!"))
}

 Test the proxy provided by ipipgo
test_proxy("123.45.67.89:8080")

IV. Frequently Asked Questions QA

Q: What should I do if my proxy IP fails frequently?
A: This situation mostly occurs in the free agent, it is recommended to use ipipgo's enterprise-class agent pool, they have each IPSurvival time monitoringThe product is automatically replaced before it fails.

Q: Instead, the acquisition speed has slowed down?
A: Check if the proxy type is chosen wrongly. For example, if you need a high concurrency scenario, don't use a residential proxy. ipipgo's technical support can help with scenario diagnosis.

Q: How can I tell which agent to use?
A: Remember the mnemonic:
- Choose a data center for speed
- To stabilize static housing
- Anti-blocking on dynamic proxies

V. Why do you recommend ipipgo?

There are so many proxy service providers in the market, but it is ipipgo that is the most reliable to use. TheirIntelligent Routing TechnologyIndeed something - can automatically match the best exit node according to the target website. The last collection of a travel site, with ordinary proxy 10 times 3 times failed, changed to ipipgo intelligent routing program, 2000 requests all successful.

Special mention of theirProbationary mechanismUnlike some platforms that give junk IPs, new users can get real test proxies and decide whether to pay for them after using them. This kind of confidence, without two brushes really dare not play so.

Finally give a piece of advice: do not save money on proxy IP. Good proxy service can make the crawler efficiency is not half a star, save time and development costs, early enough to buy a few years of service. Instead of tossing their own maintenance proxy pool, it is better to hand over to ipipgo such a professional team, worry-free!