Crawler ip proxy: crawler dedicated proxy IP rotation anti-blocking strategy

Crawler old driver are so play proxy IP

What's the biggest headache for crawlers? Yesterday was able to run the data, today suddenly 403. Those generic tutorials on the Internet always say "change IP on the line", but the actual operation is not so much. Today we nag some real, hand in hand to teach you how to use the proxy IP with the target site to play a protracted war.

Three elements at the heart of the rotation strategy

Let's start with the big truth:Simply changing IPs is no defense against banning. Nowadays, sites are so savvy with their wind control that you have to play combos:

 Practical example: Python request template
import random
import time
import requests

def smart_request(url):
    proxies = {
        "http": get_proxy_from_ipipgo(), call ipipgo's API to get new IPs
        "https": get_proxy_from_ipipgo()
    }
    headers = {
        "User-Agent": random.choice(UA_LIST), pool of user agents
        "Accept-Language": "en-US,en;q=0.9"
    }
    time.sleep(random.uniform(1,3)) random delay

    response = requests.get(url, proxies=proxies, headers=headers)
    if response.status_code == 403.
        mark_bad_proxy(proxies['http']) mark invalid ip
    return response

Focus on these three points:

Choosing the right type of agent can save you half the money

Many people do not realize that the proxy IP is also divided into three, six, nine and so on. Take ipipgo's packages for example:

Dynamic Residential (Standard) Suitable for small to medium sized data collection.
Dynamic Residential (Enterprise) Good for map data capture with regional positioning function.
Static Residential Scenarios that require long-term fixed identity

Last week, I helped a friend to adjust a case: he did price comparison crawler, using data center IP was blocked 200+ times a day. After switching to ipipgo's dynamic residential package, theBanning rate straight down 80%The key is that their IP pool is big enough to pick any local IP from over 200 countries around the world.

Must-see practical tips for beginners

1. Don't use free agents! Nine out of ten of them are honeypots. They don't even know that their data has been intercepted.
2. Don't fight with CAPTCHA, cut IP and change UserAgent immediately.
3. Important projects are recommended to be on a dedicated IP, although more expensive, but double the stability of the
4. Highest success rate for collection at 2-5 a.m. (website risk control strategies will be relaxed)

QA time

Q: Why do I still get blocked after changing my IP?
A: 80% of the request features are recognized. Check the cookie carrying, request header completeness, mouse track simulation (if it's a browser program)

Q: How to choose between static IP and dynamic IP?
A: need to maintain a long-term login status (such as climbing the need to login the site) with static, ordinary data collection with dynamic more cost-effective. ipipgo static residential package 35 yuan / month / IP, in the industry is considered a conscience price.

Q: How do I test if the agent is valid?
A: It is recommended to use double verification mode. First use httpbin.org/ip to check whether the IP is valid, and then take the small traffic page of the target website to do the real test. ipipgo's API comes with a survival detection function, which is particularly worry-free.

Guide to avoiding the pit

I recently found out that some of my peers are falling for the TK line. Although ipipgo also has this business, theOrdinary crawlers should never be usedThe first one is for specific cross-border business! That's for specific cross-border business, expensive not to mention, use the wrong scenario but easy to be blocked. Newbies should honestly use residential agents.

One final rant: don't overthink block prevention. At its core, it's just four words -act like a human being. Control the pace of access, with a reliable proxy service (such as ipipgo, which has real residential resources), you can basically run a very stable. Any specific questions are welcome, see you in the comments section!