r'web crawler framework beginner's guide

Teach you to play with proxy IP crawlers!

Just started crawling novice often encountered such an embarrassment: obviously no problem with the code, the results of running the target site will not open. This is most likely to trigger the site's anti-climbing mechanism, this time theproxy IPUp to save the day.

Why does your crawler always get blocked?

Many sites have such unspoken rules: the same IP frequent visits will be treated as robots. For example, like a supermarket cashier to remember always come to buy noodles customers, suddenly see the same person half an hour back and forth more than a dozen times, certainly to be suspicious. Using a proxy IP is equivalent to changing your face every time you enter the supermarket, so you won't be targeted.

How does the ipipgo proxy work?

We recommend our own products.ipipgoThe best thing about their house isDynamic Residential Agents. This is done in three steps:

1. Register and choose a suitable package (for personal use, we recommend hourly billing).
2. Add proxy settings to the code (a Python example is given below)
3. Set up automatic switching rules, it is recommended to change IP every 5-10 requests

import requests
proxies = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:端口',
    'https': 'http://用户名:密码@gateway.ipipgo.com:端口'
}
response = requests.get('destination URL', proxies=proxies)

Guide to avoiding the pit

Some proxies get stuck when they are used, and it is likely that they have hit these three minefields:

- Use data center IP (too distinctive)
- Switching frequency is too high (5 seconds or more is recommended)
- Failure to handle exceptions (sudden disconnections require a retry mechanism)

Practical experience sharing

I recently helped a friend with rental data collection, and used ipipgo's rotating pool, which ran for three days straight without disconnecting. The key is to setstochastic delay, don't make the access rhythm too regular. Suggest adding a random wait of 1-3 seconds to the code to disguise human operation.

Frequently Asked Questions QA

Q: What should I do if my proxy IP is slow?
A: Priority selection of local proxy nodes, ipipgo support filtering by city, pro-test latency can be reduced 30%

Q: What should I do if I need to collect data from overseas websites?
A: Just switch the export region in the background of ipipgo, and pay attention to comply with the terms of service of the target website.

Q: Do free proxies work?
A: Temporary testing can make do, long-term use absolutely must choose to pay. Free IP is basically blacklisted by various websites!

Tips for choosing a package

Looking at ipipgo's packages? Remember the formula:
Estimated Daily Requests ÷ 1000 × 1.2 = Number of IPs Required
For example, if you want to send 50,000 requests per day, choose a package of 60 IPs will be enough, leaving some margin to prevent accidents.

One last piece of cold knowledge: many old birds will use multiple proxy providers at the same time, but realistically ipipgo has the best value for money. In particular, theirIntelligent Routingfunction, can automatically avoid the blocked IP segments, the degree of saving directly pull full.