Data Extraction Method: Data Extraction + Proxy IP Technology

Stuck in data extraction? Try this "invisibility cloak" method

Brothers engaged in data collection understand that the site anti-climbing like a thief. Obviously catch a public data, not move to give you blocked IP. this timeproxy IPIt becomes a lifesaver - the equivalent of putting a cloak of invisibility on the crawler and making the site think it's a different person on each visit.

Take a real example: an e-commerce platform price monitoring, a single IP 10 consecutive requests will be pulled black. With the proxy IP pool rotation, the equivalent of hiring 100 temporary workers to work in turn, each "worker" only do a vote to change jobs. This will not trigger the wind control, but also 24 hours non-stop running data.

import requests
from ipipgo import get_proxy call ipipgo's SDK

def crawler(url).
    proxy = get_proxy(type='https') automatically fetch available proxies
    headers = {'User-Agent': 'Mozilla/5.0'}
    try.
        res = requests.get(url, proxies={"https")
                         proxies={"https": proxy},
                         headers=headers, timeout=10)
                         timeout=10)
        return res.text
    except.
        print(f"{proxy} failed, automatically switch to next")
        return crawler(url) fail auto-retry

Choosing a proxy IP is like buying groceries. It's all about freshness.

There are three main types of proxy IPs on the market, and we use grocery shopping as an analogy:

Focus on the dynamic IP. This thing.Survival time usually 5-15 minutesIt's like when you go to the grocery store and buy a live fish. Just like when you go to the grocery store to buy live fish, you have to pick the ones that are still flopping around. Like ipipgo's dynamic IP pool, specializing in survival testing, get the hands of the IP to ensure that the rate of 90% or more can be used.

A practical guide to avoiding the pit

1. Don't put your eggs in one basket.I've seen people use free proxies and have 28 out of 30 IPs fail. It is recommended to use a paid service, such as ipipgo's mixed dialing package, which supports HTTP/HTTPS/SOCKS5 protocols at the same time.

2. Request intervals should be randomized: Don't use a fixed 2 second request, change it to a random 1.5-3 second pause, so it's more like a real person's operation.

3. User-Agent to be rotated: Prepare 10 UA's for different browsers, one at a time, chosen at random, so that the site doesn't recognize you as a bot.

QA time

Q: What should I do if my proxy IP is slow?
A: Choose a node that is geographically close, for example, if the target site is a Beijing server room, choose ipipgo's North China node. Also check if you are using an HTTPS proxy to access HTTP sites, protocol mismatches will reduce speed.

Q: How many IPs are needed to be sufficient?
A: There is a formula:
Number of IPs required = Daily requests ÷ (Average daily availability per IP × 0.8)
Assuming 100,000 catches per day, each IP can be used 500 times, then 250 IPs are needed. ipipgo's package supports expansion at any time, not enough to add at any time.

Q: How do I break the CAPTCHA when I encounter it?
A: At this time, the proxy IP should cooperate with the coding platform. It is recommended to use residential IP + browser fingerprinting camouflage, ipipgo's client comes with TLS fingerprinting camouflage function, which can reduce the probability of triggering the CAPTCHA.

Why ipipgo?

After using seven or eight proxy services, I finally settled on ipipgo for three main reasons:

1. ExclusiveIP warm-up technologyNew IPs will be warmed up by other customers before being assigned to avoid being blocked at cold start.

2. SupportPer request billingIt's a much better deal than a monthly subscription for a business that fluctuates like ours.

3. Customer service response is fast, last time I encountered a technical problem at 3:00 a.m., I actually returned the work order in seconds!

Recently, they have organized a "try before you pay" activity, new users to send 1G traffic. It is recommended to take the test traffic to run a small task first, and then get on the car after testing the effectiveness, which is much more reliable than those who are not allowed to try.