BeautifulSoup Library: Python Web Parsing Guide

When the crawler meets the copper and iron wall, this is the only way to break the game.

What do you fear the most when you do data crawling? IP blocking! Last week, an e-commerce price comparison brother to find me complaining, just grabbed half an hour on the prompt "access anomaly", so angry that he straight to the keyboard. This time we have to move out of the combination of punches that we are going to talk about today:BeautifulSoup+Proxy IPThe

Chopper cuts power lines, all thanks to BeautifulSoup with lightning bolts

This library is a real labor-saving, much better than the bare hands of the demolition of the web page. For example, you want to pick the price of a product page:

from bs4 import BeautifulSoup
import requests

 Here's the kicker! Remember to put on our proxy armor
proxies = {
    'http': 'http://username:password@proxy.ipipgo.com:3128',
    'https': 'https://username:password@proxy.ipipgo.com:3128'
}

resp = requests.get('product link', proxies=proxies)
soup = BeautifulSoup(resp.text, 'html.parser')
price_tag = soup.find('span', class_='price-number')
print(f "Current price: {price_tag.text}")

Pay attention to the proxy settings piece, with ipipgo's proxy service is like wearing a bulletproof vest, username and password remember to change to their own account. Their proxy channel supports automatic rotation, much more durable than a single IP.

Three Iron Laws of Proxy IP Selection

There are all sorts of agency services on the market, but there are three that must be dead on:

Special reminder: some small workshop agent looks cheap, the actual use is like an old ox pulling a broken cart. Previously tested a certain family, 6 out of 10 IP is a dumb cannon, a waste of development time.

A practical guide to avoiding the pit

Newbies often fall into these potholes:

1. The request header's not disguised. - It's basic etiquette to add User-Agent, so that websites don't recognize you as a crawler.
2. Inadequate frequency control - Even if you use a proxy, don't bomb it so hard. We recommend 1-3 seconds of random hibernation.
3. Wrong agent certification - ipipgo's tunneling proxy should remember to bring the account password, the format must not be wrong!

question-and-answer session

Q: What should I do if I always encounter SSL certificate errors?
A: 80% is the proxy configuration problems, check whether https into http protocol. Use ipipgo's proxy to remember their ports are divided into encrypted channel and ordinary channel, don't get confused.

Q: Why are all 403 errors returned?
A: First check if the IP is blacked out. This is the time to show the advantages of ipipgo, their family IP pool is large enough to automatically switch to a new IP, much stronger than a single fight.

Q: What should I do if I need to catch offshore websites?
A: Directly in the background of ipipgo to choose the corresponding region of the export node. There are more than 30 countries nodes in their house, and the success rate of choosing the IP of the target website's location is higher.

Say something from the heart.

Doing crawler is like fighting guerrilla warfare, don't head iron hard just website protection. Use BeautifulSoup to do accurate parsing, with ipipgo's proxy service to do protection, is a sustainable program. Last week with this program to help customers do hotel price monitoring, continuous running for 72 hours without dropping the chain, this is the bottom of the professional proxy service.

Lastly, a dry run: use the coupon code when signing up at ipipgo!BS2024, can whittle down three days of enterprise-level proxy service. Tried to know, good use of the agent can really double the efficiency of the crawler, save time to jerk skewers do not smell good?