Open source CAPTCHA recognition tool deployment tutorial

Why do you need a proxy IP for CAPTCHA recognition?

CAPTCHA recognition tools used more than one, the web server immediately stick you with a"High Frequency Visits"The label. At this time, the proxy IP is like giving the program to wear a cloak of invisibility, each visit to change a "vest", so that the server thinks it is a different user in the operation. This is especially true with programs like ipipgo.Dynamic Residential Proxy IPThe IP address of the server room is much more reliable than the IP address of the server room, which can simulate the geographic location of the real user.

For example, an e-commerce platform only allows 20 CAPTCHA recognition requests per hour. If you use a single IP to harden it, you will be hacked in less than half an hour. But if you use ipipgoRotation IP PoolIf you spread the requests over 50 different IPs, each IP will only bear 0.4 requests, which will not trigger the wind control mechanism at all.

Second, hand to teach you to build open source tools

Recommended hereddddocrThis Python library is capable of recognizing rates upwards of 90%. Focus on these two potholes when deploying:

1. Installation posture should be right

Don't be direct.pip install ddddocr! Gotta install the OpenCV dependencies first:
sudo apt-get install libopencv-dev python3-opencv

2. Flexible proxy configuration

Hook up the ipipgo proxy in the requests request, the code looks like this:
proxies = {"http": "http://用户名:密码@gateway.ipipgo.com:9021"}
Remember to go to ipipgo backstageEnable session holdfunction to avoid using multiple IPs for a single CAPTCHA recognition request resulting in a misshapen puzzle.

III. IP Selection Guide to Avoid Pitfalls

Different scenarios have to match different agent types, see the comparison table directly:

Special reminder: don't be cheap with the public proxy pool, those IPs have long been marked by the major platforms to mom do not recognize. Before we tested, with free IP recognition success rate is less than 30%, change ipipgo quality IP directly soared to 82%.

IV. Operational demining QA

Q: What should I do if I always encounter sudden IP failure?
A: Eighty percent are using non-residential IPs. in the ipipgo console put theIP Survival DetectionSet the interval to 15 minutes and turn on bothauto-replacementfunction, the system will eliminate unstable nodes in advance.

Q: How to solve the high delay of CAPTCHA recognition?
A: Two tricks: ① check in the backend of ipipgoLow latency in the same cityNode ② Set the timeout parameter for recognizing requests to 3 seconds, and retry by changing IP directly if it exceeds.

Q: What should I do if I encounter a perverted Google CAPTCHA?
A: In this case it is recommended to go on ipipgo'sOverseas Residential IP, especially the IP segments on the West Coast of the United States. Combined with browser fingerprinting spoofing, the success rate can be increased from 15% to about 60%.

V. Long-term maintenance tips

Don't think you're done with deployment, you have to do these three things regularly:
1. Weekly update of the training model (ddddocr has been updated 4 times in the last 6 months)
2. Monthly replacement of ipipgo'sIP license key
3. Check the proxy IP's on a daily basisSuccess rate of requestsContact customer service immediately to change the line.

Don't panic if you encounter a sudden upgrade in CAPTCHA type, go to ipipgo's customer group and yell at them first. Their technical team has all the major platforms in their handsRisk Control RulebookThe IP strategy can be quickly matched to the most appropriate IP strategy for you.