Educational question bank collection IP | Knowledge Network / Catechism Network question bank crawler agent, break through the authentication code restrictions

How to solve CAPTCHA challenges with proxy IP for question collection?

Recently, many educational institutions have frequently encountered question banks on platforms such as Knowledge.com and Catechism.com when collectingCAPTCHA interceptionrespond in singingAccess frequency limitationThe problem. The technical person in charge of an online education platform told me that they were intercepted by the target website 17 times in 3 consecutive days, and each time they had to manually process the CAPTCHA, which seriously affected the efficiency of data update.

Realized through proxy IPReal User Behavior Simulationis the key breaking point. When the system detects high-frequency accesses from the same IP address, it triggers the verification mechanism. Our test found that: when using a normal server IP, the verification code will be triggered after an average of 15 visits; and after using a residential proxy IP, the number of visits is raised to 200 before the verification prompt appears.

Three Real-World Benefits of Dynamic Residential IP

In a question collection scenario, ipipgo's residential proxy IP has the following core values:

Recommended for practical usedynamic rotation strategy: Set the IP address to switch automatically every 50 completed question requests. This can maintain the collection efficiency and avoid triggering the website protection mechanism.

Four steps to build a stable collection environment

The configuration process of using the ipipgo proxy service as an example of a Python crawler:

1. Importing proxy middleware in code
2. Set the request interval to a random value of 3-8 seconds
3. Configure IP auto-switching rules (recommended to change every 50 requests)
4. Add an exception retry mechanism (especially when dealing with CAPTCHAs)

Example of key code snippet (simplified):
"`python
proxies = {
'http': 'http://user:pass@gateway.ipipgo.com:port',
'https': 'http://user:pass@gateway.ipipgo.com:port'
}
response = requests.get(url, proxies=proxies, timeout=10)
“`

Solutions to Common Problems

Q: What should I do if I encounter a graphical CAPTCHA?
A: It is recommended to combine the OCR recognition library, set the automatic retry mechanism when CAPTCHA is triggered, and at the same time immediately switch to a new IP.

Q: Can't get the acquisition speed up?
A: Reasonable allocation of IP resource pools and the use of multi-threaded concurrent requests. According to the real test, using ipipgo's 500 residential IP concurrent acquisition, the speed is more than 80 times that of a single IP

Q: What if I need to log in for some of the questions?
A: Using ipipgo'ssession hold functionEnsure that the login state is bound to the IP address to avoid login failure due to IP switching.

Key points for long-lasting maintenance

According to the 23 cases of educational institutions we track, successful programs have done it all:

• Daily update of IP resource pool for 20%
• Monitor the success rate of requests per IP
• Setting Access Traffic Threshold Alarms
• Regular replacement of request header information

These maintenance measures work in conjunction with the ipipgo-providedIP Health Check InterfaceIt can extend the stable operation cycle of the collection system from 3 days to more than 60 days.