Python crawler: Python proxy crawler service

Grabbing data is always blocked IP? try this trick!

Brothers engaged in crawlers understand that the biggest headache is the target site anti-climbing too hard. With their own IP hard just? Minutes to be blocked by the parents do not recognize. At this time you need a proxy IP as a stand-in, especially like theipipgoThis one can automatically change faces, and those who have used it say it really smells good.

How to choose the proxy IP so as not to step on the pit?

The market is a mixed bag of agency services, so remember the three hard indicators:

1. IP Survival Time: Don't use those short-lived ghosts that expire in 5 minutes!
2. Connection success rate: below 90% directly pass!
3. geographic coverage: to be able to match the server location of your target site

To take a chestnut.ipipgoThe survival time can reach 12-24 hours, the success rate is stable at 95% or more, 30 + provinces and cities across the country have nodes, the actual test to catch the e-commerce data stable batch.

Hands-on with Python to pick up proxies

in order toipipgoof the API as an example of a three-step process:

import requests

 Get the proxy IP (remember to change it to your own account)
proxy = requests.get("https://api.ipipgo.com/getproxy?type=http").json()

 Configure the proxy
proxies = {
    "http": f "http://{proxy['ip']}:{proxy['port']}",
    "https": f "http://{proxy['ip']}:{proxy['port']}"
}

 To start messing around with the proxy
resp = requests.get("destination url", proxies=proxies)
print(resp.text)

Be careful to add an exception retry mechanism, in case the IP fails to be able to automatically change to a new one. UseipipgoWords such as these are rare, but it's always good to be on guard.

A practical guide to avoiding the pit

Scene 1:Need to maintain session (e.g., post-login operations)
It's time to use theSession Level Agents, don't change the IP for every request or the cookie is lost. In theipipgoSelect the "long-lasting connection" mode in the background, one IP can be used for half an hour.

Scene 2:Dealing with CAPTCHA-crazed websites
recommendIP rotation + request frequency controlDouble Insurance. Use theirIntelligent SwitchingFunction, triggering CAPTCHA automatically change IP, pro-test can press the recognition rate to below 5%.

I'm sure you want to ask these.

Q: What should I do if the proxy IP suddenly fails to connect?
A: Check the whitelist settings first (ipipgo(You need to bind the local IP), and then see if the target website blocks the entire IP segment. Their technical customer service responds to thieves quickly, and people are available 24 hours a day.

Q: Will it conflict to have more than one crawler on at the same time?
A: Create multiple ones in the backendAPI key, use separate channels for each crawler. Remember to set upconcurrency limitDon't crash people's servers.

Q: How can I tell if the proxy is really in effect?
A: Add a test to the code:

resp = requests.get("http://httpbin.org/ip", proxies=proxies)
print(f "Current IP: {resp.json()['origin']}") 

Why ipipgo?

After using seven or eight agency services, I ended up locking him out at just three points:

1. Work order at 3:00 a.m. will be handled in 10 minutes.
2. new number free 5G traffic, enough to test half a month
3. There are special optimization packages for crawlers, not general purpose.

Especially that one.Failed IP auto-compensationMechanisms that are so much more conscientious than others. The last time I grabbed data on double 11, I ran 500,000 requests in 3 days and didn't turn over once.

Finally, to be honest, agency services are worth every penny. Those white-colored price of the use of two days on the original shape, the key time to fall off the chain can kill you in a hurry.ipipgoThe price is considered mid-range, but the stability and service is really worth the price, especially if you are doing commercial crawling, this cost should be spent.