Improving Python Crawler Stability with BeautifulSoup: Proxy IPs

When the crawler boy gets pulled from the site...

Recently, Lao Zhang was 403 rejected for three consecutive days when he was catching the price data of an e-commerce company. He squatted in front of the computer and scratched his head, "How come this website is more sophisticated than the neighborhood doorman?" This situation is eighty percent of the IP is recognized as a crawler. This is the time to invite outproxy IPThis vest change is a godsend.

How does a proxy IP give cover to a crawler?

Simply put, it is to give the crawler set of different vest (IP address), so that the site thinks it is more than one user in the visit. It's like going to the cafeteria and changing your license plate every time so you won't be remembered by the aunt.

Hands on Vesting for Crawlers

Here's an example of the use ofipipgoThe proxy service is a chestnut. Register first and then get the API address, remember to choose the residential dynamic IP type, this is most like a real person surfing the Internet.

import requests
from bs4 import BeautifulSoup

proxies = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:9020',
    'https': 'http://用户名:密码@gateway.ipipgo.com:9020'
}

def get_data(url).
    try: resp = requests.get(url, proxies, timeout=)
        resp = requests.get(url, proxies=proxies, timeout=10)
        soup = BeautifulSoup(resp.text, 'html.parser')
         Here is the parsing logic
        return soup.find_all('div', class_='price')
    except Exception as e.
        print(f "Fell in the hole: {str(e)}")
        return None

Focused attention:Don't skip the timeout setting! It is recommended to set it between 8-15 seconds to be able to retreat in time when encountering a lagging agent.

Don't step on these five potholes

1. The IP pool is too small:At least 500+ dynamic IPs are required to rotate, recommendedipipgoof a million IP pools
2. The requesting head is not camouflaged:Remember to bring your User-Agent and Referer!
3. Improper switching frequency:E-commerce websites recommend changing IPs once every 5-10 minutes
4. Didn't verify IP availability:It is recommended to ping the proxy server before each request.
5. The free agent trap:Nine out of 10 of those publicized free agents are the pits.

Frequently Asked Questions QA

Q: Why do I still get blocked after using a proxy?
A: Check three points: 1. whether the request frequency is too high 2. whether the proxy IP type is selected correctly 3. whether the simulation of the mouse movement and other behaviors

Q: What about slow response from proxy IP?
A: RecommendedipipgoThe smart routing feature will automatically select the node with the lowest latency. Measured can reduce the average response from 3 seconds to 800ms

Q: Do I need to maintain my own IP pool?
A: Not at all!ipipgoThe API automatically filters for invalid IPs and can be customized to export IPs by region.

Older drivers speak from experience

When I recently helped a client with a price comparison system, I used theipipgoThe rotation strategy + randomization of request intervals (1-3 seconds) ran for 2 weeks straight without triggering a windfall. Remember the key points:IP switching should be naturalDon't change your IP on time the whole time, the site is not stupid.

Lastly, a reminder to newbies: don't write a dead proxy IP in your code! It's best to make it a configuration file or get it dynamically from the API. It's better to make it a configuration file or get it dynamically from the API. This way, one day you can change the provider (althoughipipgo(good enough to use) and not scratching their heads.