Crawler http proxy ip: crawler-specific HTTP proxy rotation scheme

Teach you to use proxy IP to play around with the crawler anti-blocking

Brothers who engage in crawlers understand that the most afraid of IP is blocked. Last month I helped a friend to engage in e-commerce price monitoring, just run for two days on the blocked more than a dozen IP, so angry that he almost smashed the keyboard. Later on, using the proxy IP rotation program, and now run a stable three months without turning over. Today, this set of wild ways to share with you, specializing in a variety of anti-climbing mechanism.

Why doesn't the average IP survive more than three episodes?

Anti-crawler website is like a subway ticket inspector, specializing in catching those characteristics of the obvious "passengers". The same IP frequent visits, like the same person repeatedly swiped the subway card, not check you check who? Last year, an east upgrade anti-climbing system, the average survival time of ordinary IP from 8 hours plummeted to 20 minutes.

There are just three key takeaways:

Proxy IP Rotation Practical Manual

Here we recommend the use of ipipgo's dynamic residential agent, their IP pool is updated every day 200,000 +, the measured survival rate can reach 92%. specific operation in three steps:

import requests
from random import choice

 List of proxies from ipipgo
proxy_list = [
    "http://user:pass@gateway.ipipgo.com:30001",
    "http://user:pass@gateway.ipipgo.com:30002", ...
     ... More proxy nodes
]

def crawler(url):
    for _ in range(3): retry 3 times
        try.
            proxy = {"http": choice(proxy_list)}
            response = requests.get(url, proxies=proxy, timeout=10)
            return response.text
        except Exception as e.
            print(f "Change IP and fight again: {e}")
    return None

Be careful not to step in these three potholes:

1. Don't use free proxies (slow and leaky)
2. Must change IP for each request (fixed IP equals suicide)
3. Set timeout to no more than 15 seconds (to prevent stuck processes)

White Frequently Asked Questions First Aid Kit

Q：What should I do if the proxy IP suddenly fails?
A: eighty percent of the IP pool should be changed, recommended ipipgo's intelligent refresh function, can set the threshold for automatic replacement

Q: What can I do about slow access?
A: 1 check the agent package balance 2 switch terminal area 3 contact ipipgo customer service to exclusive high-speed channel

Q: Which agent package should I choose?
A: Newbies are advised to use ipipgo's pay-as-you-go package and buy a 10G traffic package to test the waters first. It's more cost-effective to switch to a monthly subscription when you're up and running.

Say something from the heart.

Proxy IPs are used well, and crawler longevity is less. The key is to find someone like ipipgo who can provide aNative Residential IPThe service provider, their IP are real people equipment raised, than the server room IP reliable not one star half a point. Recently, I saw that their family is doing 618 activities, new users to send 5G flow, it is recommended to go to the white whore a trial set to feel it.

Lastly, I would like to remind all my brothers that you have to be martial in your crawling. Set a reasonable access interval, don't crash the site. After all, we are only dealing with data, not sabotage, right?