Data Crawl URL Error: URL Error Proxy Solution

Don't Panic When Data Crawling Encounters URL Errors

Engaged in data capture of the old driver know, encountered URL error with the drive encountered traffic jam as common. The most common are three situations:Wrong letters in the address bar,Targeted websites with access thresholds,Visiting too often and getting blackballedThe first thing you should do is to try the proxy IP. At this time, do not rush to change the code, first try the proxy IP this "alternate lane".

Real case: an e-commerce price monitoring cartwheel record

Last week a brother to do price comparison system to find me, his script running suddenly reported 404. check half a day found that the URL is not written wrong, the site has not been revamped. Later, he used ipipgo's proxy IP rotation and found that it isThe target website has a limit on the number of visits to a fixed IP address.The data can be captured normally again. After switching to a dynamic proxy pool, the IP is automatically switched 20 times per hour, and the data can be grabbed normally again.

import requests
from ipipgo import RotateProxy Highlight our own products!

proxies = RotateProxy.get_proxy() Automatically gets the latest proxies
headers = {'User-Agent': 'Mozilla/5.0'}

headers = {'User-Agent': 'Mozilla/5.0'}
    response = requests.get('https://目标网站/product/123',
                         proxies=proxies,
                         headers=headers, timeout=10)
                         timeout=10)
    print(response.text)
except Exception as e.
    print(f'Crawl failed, auto switch proxy retry: {e}')
    RotateProxy.mark_bad_proxy(proxies) mark failed proxy

Three Tips to Solve URL Access Difficulties

Tip #1: Formatting errors should be prevented
Don't laugh! There really are programmers who write "https://" as "htps://". It is recommended to pre-check it with a regular expression:

import re
pattern = r'^https?://(? :[-w.]|(? :%[da-fA-F]{2}))+'
if not re.match(pattern, url):: print("pattern = r'^https?
    print("There is a problem with the address format!")

Tip #2: Take a detour for counter-crawl interceptions
When a 403 error occurs, this combination is recommended:

Tip #3: Frequency limits to be regulated
The same IP with more than 50 requests per minute will be banned. use ipipgo'sIntelligent Dispatch ModeThe system will automatically assign export IPs in different regions, and the measured success rate can be mentioned above 92%.

White Frequently Asked Questions QA

Q: What should I do if the proxy IP is invalid after using it?
A: Go with ipipgo'sAutomatic cleaning agent poolThe system automatically rejects failed nodes every 5 minutes, which is much less laborious than manual maintenance.

Q: How do I test if the agent really works?
A: Test connectivity with this command first:

curl -x http://用户名:密码@ipipgo proxy address:port http://ip.ipipgo.com/

Q: What should I do if I encounter an SSL certificate error?
A: In the request parameters addverify=FalseWhile it can be a temporary fix, it is more recommended to turn it on in the ipipgo consoleHTTPS tunneling mode, which is both safe and stable.

A guide to avoiding the pitfalls to remember

A few final rants:
1. Don't buy a shared proxy for cheap, 10 people using the same IP will die faster.
2. Don't fight with CAPTCHA, cooperate with ipipgo'sMan-Machine Validation Solutionsmore economical
3. 2-5 a.m. to capture a higher success rate, with the timing of the task is more effective