Can this thing really be used for nothing? The Truth About Free Proxy IP Harvesting
Engage in network crawler partners understand that the proxy IP is like playing the game of resurrection coins. Free proxy collection tools on the market look quite fragrant, the actual operation of all the pits. For example, a website claimed that "daily update 5000 + IP", the actual test can not use more than 10. Let's teach people today to write their own scripts, which are much more reliable than those ready-made tools.
A collection program that can be started in three lines of code
We use Python to get a minimalist collector, the core of the three modules:Requests to send requests, BeautifulSoup pickpocket web pages, re regular fishing data. As a chestnut, many websites hide their IPs in the
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import requests
from bs4 import BeautifulSoup
url = 'http://example-free-ip-site.com' Replace the real address.
resp = requests.get(url).text
soup = BeautifulSoup(resp, 'html.parser')
ip_list = []
for td in soup.find_all('td'):: if re.match(r'd')
if re.match(r'd+.d+.d+.d+', td.text):.
ip_list.append(td.text+':'+td.find_next_sibling().text)
Pay attention to the SLEEP time to 3-5 seconds, do not make people's websites hang. Some sites are very anti-climbing, this time you have to hang theipipgoThe dynamic proxy, their high stash of IP success rate can be more than 90%.
What's wrong with IPs that don't survive 5 minutes?
Eighty percent of the collected IP is not usable, we have to do a survival test. Focus on three indicators:
test item | Qualifying standards |
---|---|
responsiveness | <3 seconds |
continuous availability | >10 minutes |
Degree of anonymity | No exposure of real IP |
The validation script is written this way:
import concurrent.futures
def test_proxy(proxy)::
try: resp = requests.get('')
resp = requests.get('http://httpbin.org/ip', proxies={'http': proxy}, timeout=5)
proxies={'http': proxy}, timeout=5)
return True if resp.status_code == 200 else False
return False if resp.status_code == 200 else False
return False
with concurrent.futures.ThreadPoolExecutor() as executor: results = executor.map(test_protocol)
results = executor.map(test_proxy, ip_list)
valid_ips = [ip for ip, result in zip(ip_list, results) if result]
Free is not reliable after all Professional service saves your mind
Why don't you just use theipipgoof a pool of ready-made agents. The advantages of their home are plain to see:
- ✅ 24-hour automatic filtering of invalid IPs
- ✅ Node coverage in 200+ cities across the country
- ✅ HTTP/HTTPS/Socks5 full protocol support
Especially to do e-commerce price comparison, short video data collection of these need to stabilize the IP scene, free IP minutes off the chain. The last time I did an e-commerce platform crawler, with a free IP to stick to 13 minutes was blocked, change theipipgoThe commercial version of it lasted 6 hours and was fine.
Frequently Asked Questions QA
Q: How long will the free agent last?
A: Median measured survival time 27 minutes, longest record encountered 2 hours, but probability of failure within 10 minutes
Q: How can I improve my collection efficiency?
A: The key is multiple data sources + regular updates. It is recommended to monitor 5-8 free websites at the same time and run a collection script every half hour
Q: Why do I need to change my IP regularly?
A: Frequent visits from the same IP will be recognized as bots. UseipipgoThe rotation service can be set to automatically change the IP address 3 times per request, fully simulating the operation of a real person.
Q: Are commercial agents expensive?
A: byipipgoFor example, 5 dollars a day can get 3000 times high-quality IP calls, than self-built proxy pool to save a lot of trouble. Newcomers to the first month also send 5,000 free quota, register to fill in the [VIP2024] can receive an additional 1,000 times!