Proxy Gathering Tools: Free IP Verification Crawler Scripts

What can this thing do for you?

Engage in data capture is the biggest headache is IP blocked, this time you need to find some proxy IP can be used to top package. It's too much effort to find free IPs manually, so today I'm going to teach you to use Python to write aAutomatic validation of crawler scriptsthat specializes in cleaning up those unreliable proxy IPs.

For example, you want to catch the price of the e-commerce site, continuous use of the same IP wildly sweep half an hour, I'm sure to be blacklisted by the site. If you have dozens of verified proxy IPs at hand to use in turn, this thing will be a success.

The doorway to finding a proxy IP

Free proxy sites are a dime a dozen, but nine out of ten are pits. Here is a comparison table for you to take a look at:

Recommended for serious projects.ipipgoThis kind of professional service provider. Their IP pool is large, but also with automatic replacement function, than the free IP to save not a star and a half point.

Hands-on Validation Scripting

The following code automatically tests that the proxy IP works:

import requests
from concurrent.futures import ThreadPoolExecutor

def check_proxy(proxy)::
    try: resp = requests.get('')
        resp = requests.get('http://httpbin.org/ip', 'http': proxy, 'https': proxy, 'https': proxy)
                          proxies={'http': proxy, 'https': proxy}, timeout=5))
                          timeout=5)
        if resp.status_code == 200.
            print(f'{proxy} Authentication passed!)
            return proxy
    except.
        pass
    return None

 Fill in the list of IPs you want to test
ip_list = ['123.45.67.89:8888', '111.222.333.444:3128']
with ThreadPoolExecutor(max_workers=10) as executor:
    valid_ips = list(filter(None, executor.map(check_proxy, ip_list)))

print('The IPs that work are:', valid_ips)

这个脚本用了多线程代理ip验证，实测100个IP大概20秒就能筛完。注意要把测试网址换成你自己要访问的目标站，这样测出来的结果更准。

Frequently Asked Pitfall Questions and Answers

Q: What should I do if I can't connect to the free agent?
A: Normal phenomenon! Free IP survival rate was not high, it is recommended to use ipipgo'spay-per-use packageYou can use as much as you want without wasting it.

Q：How come the verified IP is not working again?
A: Proxy IPs are inherently time-sensitive, remember to add a crawler to theautomatic retry mechanismIf you find that the IP is not working, change to the next one immediately.

Q: What if it's too much trouble to maintain the proxy pool myself?
A: Directly on ipipgo's API service, their IPs are pre-verified, take them over and you can use them directly, saving time and effort.

How the pros play

If you really want to get into large-scale data collection, it is recommended to pair these tricks:

1. set upIP switching frequencyDon't use a single IP for everything.
2. add sth. into a groupUser-Agent RotationDon't let the site recognize you as a crawler
3. Important items to remember on ipipgo'sExclusive IP packageStability pulls straight through.

One last rant, free IP for fun is fine, but you really need professional services to do the work. Like ipipgo withautomatic verificationrespond in singingreal time updateThe proxy service that can make your crawlers step on 80% less. You also get a trial credit for signing up now, so try it for yourself and see how good it smells.