7 technical solutions to break CAPTCHA (with real code)

First, why the CAPTCHA always staring at you?

engaged in crawling partners must have encountered this situation: just grabbed two pages of data on the CAPTCHA pop-up. In fact, this is the website through theIP access frequency detectionAt play. Normal users don't request data 50 times in 10 seconds, but crawlers do. The solution is simple - use ipipgo's Dynamic Residential Proxy to spread out single IP requests to different exit IPs, making the site think it's being operated by multiple real users.

Second, simple and rough OCR recognition method

Don't panic when you encounter a numeric-alphanumeric CAPTCHA, try installing a tesserocr library first. Use ipipgo's proxy pool to switch IPs to avoid triggering bans due to frequent attempts. Code example (Python):

import requests
from PIL import Image
import tesserocr

with requests.get('CAPTCHA address', proxies=ipipgo.get_proxy()) as res:: image = Image.open(BytesIO(res.content))
    image = Image.open(BytesIO(res.content))
    print(tesserocr.image_to_text(image))

Note that to adjust the image grayscale value and binarization threshold, the specific parameters have to try themselves. ipipgo's proxy IP is automatically replaced each time, not afraid of trial and error is blocked.

III. Human-computer behavioral simulation

Advanced CAPTCHA detects mouse tracks and click intervals. This is done using selenium to simulate a real person:

from selenium.webdriver import ActionChains

driver = webdriver.Chrome()
driver.get(url)
ActionChains(driver).move_by_offset(10,20).click().perform()

Remember to pair it with ipipgo'sResidential Agents, with different IPs for each browser instance. measured to bypass 90%'s sliding CAPTCHA every day with this method.

IV. Distributed blasting of the soi operation

Go distributed when it comes to particularly difficult CAPTCHAs. Use Redis for the task queue, 20 servers running at the same time:

while True: task = redis.rpop('task_queue')
    task = redis.rpop('task_queue')
    result = process(task)
    redis.lpush('result_queue', result)

Each machine uses a separate IP outlet from ipipgo, which directly doubles the success rate. We've realistically tested cracking 4-digit CAPTCHA with this method at 18 times faster than a standalone machine.

V. Black technology for protocol camouflage

Some sites detect HTTP header characteristics. Use the advanced settings of requests:

headers = {
    'Accept-Language': 'zh-CN,zh;q=0.9',
    'X-Forwarded-For': ipipgo.get_random_ip()
}

The point is to randomly generate User-Agent. ipipgo's IP library comes with X-Forwarded-For camouflage, which can fool 80%'s protocol detection.

Six, coding platform mixing techniques

If you can't handle the CAPTCHA, you can find a manual coding platform. But pay attention to two points: 1) use different IP to submit the verification code 2) control the frequency of calls. It is recommended to use ipipgoLong-lasting static IPEstablish a fixed channel so that the coding platform will not misjudge the abnormality due to frequent IP changes.

VII. The Ultimate IP Stealth Method

The key to using a combination of the above six methods is good IP management. Show you a real-world configuration table:

Remember to integrate ipipgo's auto-switching module in the code, and their API return speed is measured to be 40% faster than peers, and no chain is dropped during peak hours.

Frequently Asked Questions QA

Q: Will I be found out if I use a proxy IP?
A: choose ipipgo's high stash proxy, the request header will remove the X-Proxy information, the server can only see the export IP

Q: What about the low success rate of CAPTCHA cracking?
A: At the same time with more than 3 methods, such as the first OCR recognition failure and then use the coding platform, different methods with different IP channels

Q: How can I prevent my IP from being blocked?
A: ipipgo's intelligent routing will automatically filter the IP marked by the site, the actual use of the blocking rate dropped 70%

Q: Do I need to maintain my own IP pool?
A: Not at all, ipipgo's cloud IP pool is updated daily with 20%IP, which is much more trouble-free than self-built IP pools.