Crawling Proxy: Free Proxy IP Authentication Crawler Scripts

Proxy IP masters understand those things

Do network crawler this line of old iron must have encountered such an embarrassment: just found a few free proxy IP, with less than half an hour on the collective strike. At this time, if there is a script that can automatically crawl + verification, it is really a relief. Today, we will teach you a wholeProxy IP Harvester for Dummies, specializing in all kinds of IP failures.

Where are the free agents hiding?

The common free agent sources online are just those sets:

But there's a common problem with these free IPs - nine out of ten are bad. This is where ourIntelligent Verification SystemCome on the big wave.

Top 3 Tips for Hand Rub Verification Scripts

It's not really hard to write a script in Python, the key is to have these three core functions in place:

1. multithreaded harvesting: Don't wait around, open 20 threads at the same time to catch different sites!
2. survival testing: Use Baidu as a litmus test is the most reliable (response time should not be more than 3 seconds)
3. automatic weight removal: Kicked out of the group chat when encountering duplicate IPs

Here's a tip: remember to randomly change the User-Agent when detecting, some sites love to block requests with fixed identifiers.

The Three Deadliest Points of Free Agents

Anyone who has used a free IP knows the pitfalls:

• Works in the morning hangs in the afternoon (survival time depends on luck)
• Slower than a snail's pace (latency not moving 500ms+)
• Hiding all sorts of honeypot traps (some IPs specialize in catching crawlers)

This is the time to consideripipgoThe unique solution, their IP pool is updated every day 8 million + resources, but also with intelligent route optimization, much more stable than the free agent.

QA time: a must for newbies

Q: Why do I need to buy a paid agent when a free one is enough?
A: Let's put it this way, free proxies are like public restrooms - anyone can use them, but the hygiene is... especially for commercial projects, it's safer and more worrying to use paid IPs.

Q：How come the verified IP still can't be used?
A: It may be that the target site has added human verification, which will have to be on theDynamic residential IP for ipipgo, simulating the operation of a real person in order not to be recognized.

Q: Is it cost-effective to build my own agent pool?
A: Do the math: server costs + maintenance time + validation costs, it's better to just use what's readily available. Like ipipgo this pay-per-use model, use as much as you can without wasting.

The Ultimate Solution

Tossing your own agent pool is like growing vegetables at home - fresh in the beginning, troublesome in the end. Leave the pros to the pros.ipipgoof intelligent dispatch systems can do:

• Automatic switching of failed IPs (millisecond response)
• Matching IP type (data center/residential/mobile) to business needs
• Self-contained request failure retry mechanism

The key is that their API access is super simple, three lines of code and you're done, much less work than maintaining your own crawler scripts. Now new users also get5000 free trialsIt's better than looking around for a free IP.