Free Web Crawler Tools: Free Crawler Tools Recommendations

Why are you always blocked IP, don't step on these pits!

Older drivers who engage in web crawling understand that the biggest headache is theIP blockedIt's like going to the market and always wearing the same clothes. It's like going to the market and wearing the same clothes all the time, and the vendor will kick you out when he sees you. A lot of newbies use free proxies directly, and the result is either slow as a turtle crawling, or used twice on the scrap. Here to say a big truth:Free tools must be coupled with a reliable proxy IPto be able to play around with it.

For example, last year there was a little guy who did price comparison and wrote a crawler script in Python. The first three days were fine, the fourth day suddenly403 error messageSwipe. Only later did I realize that the target site had already blacked out his local IP. This is a typical "vest" without wearing a naked run, deserved to be blocked.

Second, hand to teach you to choose a free capture tool

Here are three recommendationsA real fighter.The free tool, remember to use it with ipipgo proxy for better results:

Focusing on how Scrapy hooks up proxies, take the ipipgo API as an example:

 Add this to settings.py
IPIPGO_PROXY = "http://用户名:密码@gateway.ipipgo.com:端口"

DOWNLOADER_MIDDLEWARES = {
    'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware': 543,
}

Third, the correct way to open the proxy IP

Anyone who has used ipipgo knows that his familyDynamic Residential AgentsIt's real flavor. A few real-world stats:

• Success rate from 52% → 89%
• Reduction in single-task acquisition time by 40%
• Average IP survival time of 3 hours

Here's the point! A lot of people don't knowAgent Rotation Strategy: It is recommended to change IP every 50 requests, or switch automatically according to the response status code. This will save cost and prevent banning.

IV. Frequently Asked Questions QA

Q: Do free proxies work?
A: Emergency is fine, but don't expect stability. When I tested a free proxy pool before, 6 out of 10 couldn't connect, and the remaining 4 had speeds of more than 8 seconds.

Q: What are the special advantages of ipipgo?
A: His IP pool is large enough to be especiallyCity-level positioningDoing very fine. The last time I needed an IP in Shanghai Jing'an District, I got it in 5 minutes and had a great success rate.

Q: How can I salvage my IP after being blocked?
A: Immediately deactivate the current IP, use ipipgo's background management to change to a new IP. it is recommended to set up an automatic meltdown mechanism, which detects 3 consecutive failures and automatically switches.

Fifth, anti-sealing secret open

Remember these three.life-preserving mnemonic::

1. Randomly spaced visits (don't be on time like a robot)
2. Simulation of real-life operations (mouse movements, scrolling pages)
3. Multi-device fingerprinting (User-Agent remembers to change often)

Finally, an industry insider's tip: many websites have an anti-crawl strategy that isBehavioral analysis + IP reputation repository。所以千万别用代理，那些IP早就被标记烂了。用ipipgo这种专业服务商，IP纯净度高，做长期项目才稳当。