Crawler proxy ip tutorial: Python crawler using dynamic proxy IP anti-blocking strategy practice

Crawlers are always blocked? Try this dynamic skinning trick

Crawler brothers understand that the biggest headache is the target site suddenly give you a blocked IP package. Don't worry, let's nag some real today - how to use dynamic proxy IP to make the crawler into a "chameleon", specifically to deal with the blocking mechanism.

Why are dynamic proxies a life preserver?

There are two main things to look for in a website's IP block:Access frequencyrespond in singingtrajectoryDynamic proxies are like wearing an invisibility cloak for a crawler. Dynamic proxies are like wearing a cloak of invisibility for the crawler, changing the IP address every few visits. For example, if you use ipipgo's Dynamic Residential Proxy, each request goes to a different carrier IP in a different region, and the server simply can't figure out the pattern.

import requests
from random import choice

 The API provided by ipipgo extracts the link
proxy_api = "https://api.ipipgo.com/getproxy?type=dynamic"

def get_proxies():
    proxies_list = requests.get(proxy_api).json()['data']
    return {'http': choice(proxies_list)}

response = requests.get('destination URL', proxies=get_proxies(), timeout=10)

Agent matching value three big pits

Many newbies fall prey to these questions:

1. Agent quality pumping:Using free proxies is like opening a blind box, you can't tell when you'll be disconnected.
2. IP switching is too straightforward:Don't be stupid and change it once in 1 minute, learn the human operation interval
3. The agreement does not match:https sites with http proxies are sure to be exposed.

Real-world anti-blocking four-pronged axe

QA First Aid Kit

Q: What is the difference between dynamic and static proxies?
A: Dynamic IP is automatically changed every time you visit, suitable for high-frequency crawling; static IP is fixed and unchanged, suitable for scenarios that require logging in. ipipgo's static residential packages start at 35 yuan/IP/month, making e-commerce data collection quite cost-effective.

Q: How do I test if the proxy is valid?
A: Use this detection script:

detecting proxies = 'http://httpbin.org/ip'
resp = requests.get(detect proxies, proxies=proxy dictionary, timeout=5)
print(resp.json()) show current IP used

Q: Can a blocked IP be resurrected?
A: Dynamic IP is sealed directly new on the line, ipipgo's dynamic residential pool is large, more than 7 yuan 1G flow enough to use. If the static IP is blocked, you have to contact customer service to change the binding.

Choosing an agent depends on the doorway

There are all sorts of agency services on the market, so focus on these three things:
1. Is the IP pool large enough (ipipgo covers 200+ countries)
2. protocol support is all or nothing (socks5 is the most robust)
3. Inconvenience of the extracting party (API interfacing saves time)

Finally, a piece of advice: don't use free proxies for cheap, or the data is not allowed, or the code leaks. Like ipipgo such professional service providers, dynamic residential packages more than 7 yuan 1G, the enterprise version is only more than 9 yuan, more cost-effective than self-built proxy pool. Their API documentation for novice special friendly, but also support socks5 protocol, cross-border e-commerce data collection brothers can try cross-border line.