Web Crawler: Web Proxy Crawler Service

What to do when a crawler encounters an anti-crawler? Try this.

The friends who have engaged in web crawling understand that the biggest headache is the other site suddenly blocked IP. last week I helped a friend to grab the price data of an e-commerce platform, at first well, two hours later, suddenly 403 error - well, the IP has been blacked out. This is the time toProxy IP ServiceDebut.

Take a real scenario: Suppose you want to monitor the price changes of 10 competitor websites, and crawl them 20 times a day at regular intervals. If you use your own server IP to do this, it will be blocked in less than three days. With ipipgo's proxy pool, each request to randomly switch the exit IP, like a crawler wearing a myriad of "masks", the site wind control system can not distinguish between a real person to visit or machine.

import requests
from ipipgo import get_proxy Assume this is the SDK for ipipgo.

def safe_crawler(url).
    try: proxy = get_proxy()
        proxy = get_proxy() Automatically get the latest proxy.
        response = requests.get(url, proxies={"http": proxy, "https": proxy})
        return response.text
    except Exception as e.
        print("Crawler error automatically switched IPs:", e)
        return safe_crawler(url) recursive retry

What are the doors to look for when choosing a proxy IP?

There are a lot of proxy service providers on the market, but there are also a lot of pits. Last year, I used a service that claimed to have millions of IP pools, and the actual availability was less than 30%. later, I switched to ipipgo and realized thatThree elements to look for in a good agent::

1. Shelf life: short-lived proxies (5 minutes) for high-frequency requests, long-lived proxies for scenarios that require session maintenance
2. geographic locationBeijing web site to catch Beijing IP, do not use the IP of Guangzhou to access the northern services!
3. Protocol Support: Many sites now force HTTPS, and proxies that only support HTTP are directly scrapped!

Insert a real case here: the anti-crawl strategy of a travel platform will detect the geographic location of the IP. Use ipipgo'sCity-level location agentsIn the end, it successfully bypassed the geographic checks and captured the price data that was originally displayed as "Local Users Only".

I'll show you how it's done.

Don't rush to write code after registering ipipgo, do these three steps first:
1. Create a "crawler-specific" key in the console
2. Choose the volume-based billing model (recommended for novices)
3. Enable automatic IP replacement (120-second switching recommended)

Pitfalls easily encountered during the debugging phase:
- Requests are too frequent to trigger the security policy → add random delays (0.5-3 seconds) to the code
- Some sites require cookies → use ipipgoSession Holding Agent
- Return data garbled → check Accept-Encoding parameter in request header

Five questions you might ask

Q: What should I do when my IP is blocked?

A: ipipgo's proxy pool is automatically updated every 5 minutes, and the system will automatically remove invalid IPs when they are blocked.

Q: Why is the proxy slow sometimes?

A: you can switch the connection protocol to try to change HTTP/1.1 to HTTP/2 can usually speed up 30%

Q: Do I need to maintain my own IP pool?

A: No need at all, ipipgo's background will automatically detect and update the available IPs, which is much more efficient than building your own proxy pool.

Q: How do I verify if the agent is in effect?

A: Visit https://ip.ipipgo.com/checkip to see the currently used exit IPs

Q: How do I break the CAPTCHA when I encounter it?

A: ipipgo'sHigh Stash Agents+ Simulate mouse movement trajectory, can significantly reduce the CAPTCHA trigger rate

Finally said a cold knowledge: many websites anti-climbing strategy in the early morning 2-5 points will relax, this time with ipipgo's agent to do batch crawling, the success rate can be improved 60% or more. Of course, the specific strategy also depends on the situation of the target site, it is recommended that the first test with a small amount of traffic and then on the official task.