Ruby Web Crawling: Automated Data Collection

First, why is your crawler always pulled by the site?

Recently, a lot of brothers who do data crawling complained to me, saying that the hard-written Ruby scripts ran and ran and stopped. Lao Zhang I did eight years of crawler development, found that 90% of the problems are in the IP. Many websites are now like thieves, the same IP continuous visit more than 10 times will be directly blocked, especially the price data of those e-commerce platforms, simply more difficult to pry than the safe.

To cite a real case: my apprentice Wang wanted to grab a clothing site last week, new product data, with their own home broadband IP tried three times all failed. Later, he switched toDynamic Residential Proxy for ipipgoThe success rate of the IP address of the IP address is 30% to 95%, which means that the IP address of the IP address of the IP address of the IP address of the IP address of the IP address of the IP address of the IP address is 30%.IP quality directly determines whether a crawler lives or diesThe

Second, hand to teach you to use Ruby to engage in proxy IP

Let's start with the simplest implementation, using Ruby's Net::HTTP library:

require 'net/http'

proxy = Net::HTTP::Proxy('proxy.ipipgo.com', 8080, 'username', 'password')
response = proxy.get_response(URI.parse('http://目标网站.com'))

puts response.body

Here's a couple.Easy to step in the pitThe place:

1. Don't copy the online examples of proxy ports, they are different from one provider to another.
2. Authentication information is recommended to be stored in environment variables, not directly in the code.
3. Timeout settings are best kept at 3-5 seconds, too long to affect efficiency

Third, the proxy IP selection has to pay attention to

The common types of agents on the market Lao Zhang have helped you test the water, directly on the comparison table:

Here's the kicker.ipipgo's one-of-a-kindTheir Dynamic Residential Proxy supports automatic IP switching by request, and with Ruby's Typhoeus library to do concurrency, it is tested that opening 50 threads at the same time won't trigger a ban.

Fourth, the actual combat anti-blocking strategy package

It's not enough to have an agent, you have to talk about combinations:

• Random request intervals: userand(1..3)Generation Waiting Time
• User-Agent Rotation: Preparing 20 Common Browser Logos
• Cookie management: clear the session every time you switch IPs
• Failure retry mechanism: three retries + automatic switching of proxy nodes

Special reminder: don't try to buy those public proxy pools cheaply, Lao Zhang previously used an unknown service provider, 8 out of 10 IPs are marked, pure waste of money.

V. QA Time: Frequently Asked Questions for Beginners

Q: How long do I have to wait after getting my IP blocked?
A: This depends on the site strategy, the ordinary site may be a few hours, but like an orange e-commerce platform will be closed for 30 days. So don't wait, directly change ipipgo's dynamic IP

Q: Which one to choose between HTTP and SOCKS proxy?
A: Newbies are advised to use HTTP proxy, which is easy to configure. If you need to climb HTTPS site, remember to set in Rubyuse_ssl: true

Q: How can I tell if a proxy is in effect?
A: Add a debug statement in the code to output the proxy IP currently in use, or directly use the real-time monitoring dashboard in the ipipgo backend.

Sixth, say something heartfelt

Do crawl these years, seen too many people can not afford to invest in IP. There is a competitor analysis of the customer, the early figure of cheap with free agents, the results of the data confusion led to decision-making errors, the loss of more than 2 million. Later changed to useEnterprise packages from ipipgoThe agency cost alone has saved 60%, why? Because the efficiency of effective data acquisition has been improved!

Finally, a piece of advice: do not waste your time in the maintenance of proxy IP, professional things to professional people. Now register ipipgo also can get 3 days free trial, go to the official website to see it, than here to listen to my chatter works a lot.