Why do I need to build my own agent pool? Well, it starts with a real need.
You may have encountered this situation: free proxies found on the Internet are invalid after use, slow as a snail, and often blocked. Commercial proxies are stable, but the cost is high, and sometimes the IP repetition rate is quite a headache. The biggest advantage of building your own proxy pool iscontrollableYou can flexibly adjust the number and quality of IPs according to your business needs, which in turn costs less in the long run.
The build process does require some technical grounding though, but don't worry, I'll try to break down the steps as clearly as possible in layman's terms. The core idea of the build program we're going to talk about today is that"Capture-Verify-Store-Schedule."Four segments of closed-loop management. I'll take you step-by-step through the realization below.
Preparation: the right tool for the job
Before you start, you have to prepare these basic environments:
- Python 3.7+ (use this mostly for writing scripts)
- Redis database (for storing proxy IPs)
- Requests library (sending HTTP requests)
- A couple of free agent source sites (e.g., Western Spur, Fast Agent, etc.)
Here is a small suggestion: at the beginning, do not pursue the big and comprehensive, first to achieve the basic functions and then slowly optimize. Many people get stuck in the first step because they think too complicated.
Step 1: Several practical ways to capture proxy IPs
There are three main ways to crawl proxy IPs: free websites, paid APIs, and self-built crawlers. Although free websites don't cost any money, their quality varies; paid APIs are stable but costly; self-built crawlers are the most flexible but require maintenance.
I'd recommend it.hybrid model-Free sources as the main source, with a small number of paid APIs as a supplement. This keeps costs in check and ensures a certain level of usability.
Here's a simple capture example, using the West Stinger agent as an example:
import requests
from bs4 import BeautifulSoup
def fetch_xici_proxies():: url = ''
url = 'https://www.xicidaili.com/nn/'
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'}
try: response = requests.get(url)
response = requests.get(url, headers=headers, timeout=10)
soup = BeautifulSoup(response.text, 'html.parser')
Parsing a form to get the IP and port
... The parsing logic is omitted here
return ip_list
except Exception as e.
print(f "Capture failed: {e}")
return []
Note that free sites are frequently revamped, so the parsing logic may need to be adjusted at any time. This is why I recommend not relying entirely on free sources.
Step 2: Verifying that the proxy is available is a critical part of the process
Caught IP not all can be used, so the verification link is particularly important. Verification method is very simple: use this proxy to visit a stable site (such as Baidu), to see if the normal return results.
There are several indicators to look for when validating:
- responsiveness: Anything over 5 seconds is basically a goner.
- Degree of anonymity
- stability: Test several times in a row to see if it is stable
Validation code example:
def check_proxy(proxy):
test_url = 'http://www.baidu.com'
try.
response = requests.get(test_url, proxies={'http': proxy, 'https': proxy}, timeout=5)
if response.status_code == 200:: response = requests.get(test_url)
return True
return True: if response.status_code == 200: return True
return False
return False
Validated IPs are ready to be warehoused, but remember to re-validate them periodically, as proxy IPs usually don't have a long expiration date.
Step 3: Be strategic about storage and scheduling
Storing proxy IPs is recommended to use Redis because it is fast and supports various data structures. We can store it in a Sorted Set (Sorted Set) with scores indicating the quality of the IP (response speed, success rate, etc.).
Scheduling strategies directly affect usage. Common strategies are:
- random selection: easy but may pick slow
- polling: Ensure that every IP has the opportunity to be used
- Quality firstAlways choose the highest quality
I suggest choosing a strategy based on business requirements. For example, choose quality first for high speed requirements, or randomly for high anonymity requirements.
Step 4: Considerations for practical application
After the proxy pool is built, there are still various problems encountered in actual use. For example:
- IP blocked: Control the frequency of visits to simulate the behavior of real people
- Connection timeout: Set a reasonable timeout period to weed out invalid IPs in a timely manner
- IP duplication: Do a good job of de-duplication to avoid repeated use of the same IP within a short period of time
These are lessons learned and need to be slowly worked out and adjusted in practice.
Advanced Programs: Combining Professional Services to Improve Efficiency
Building a proxy pool on your own is controllable, but the maintenance cost is not low. If your business has higher requirements for proxy IPs, you can consider combining professional services.
for exampleDynamic Residential Proxy for ipipgoThere are just 90 million+ IP resources covering more than 220 countries, supporting per-flow billing and rotating sessions. Their IPs are from real home networks with high anonymity, especially suitable for scenarios requiring high anonymity.
If your business requires long-term stable IPs, considerStatic residential proxy for ipipgoIt has 500,000+ IP resources, 99.9% availability, and supports accurate city-level localization.
The advantage of professional service is that it saves the trouble of maintenance and the quality is more guaranteed. You can use the self-built proxy pool as a base and call the professional service when you need high-quality IPs, which can control the cost and guarantee the result.
Frequently Asked Questions QA
Q: How many IPs do I need for the proxy pool to be sufficient?
A: It depends on the specific business needs. Generally, a few hundred high-quality IPs are enough for small-scale crawlers, while large-scale business may require thousands or even tens of thousands. The key is not the quantity but the quality, 100 available good IP is better than 1000 good and bad.
Q: Is it true that free proxies don't work?
A: It's not totally unavailable, but be cautious. Free proxies are suitable for temporary tasks that do not require high stability, and it is still recommended to use paid services or build your own high-quality proxy pool for important business.
Q: How do I determine how anonymous a proxy is?
A: You can test this by visiting some websites that display IP information to see if the real IP is exposed. high stash proxies do not pass any raw client information.
Q: How often does the agent pool need to be updated?
A: It depends on how long the IP survives. Free proxies may expire in a few hours, paid ones can last a few days or even longer. It is recommended to set up a timed task, such as hourly verification, to weed out invalid IPs in time.
put at the end
Building a proxy pool is a technical task that requires patience and constant tweaking. You may encounter various problems in the beginning, but this is normal. The key is toStart small and improve graduallyThe
If you're having trouble setting up, or if your business requires a higher level of proxy IPs, you can try ipipgo's services. They offer various types of proxy solutions and should be able to find one that suits your needs.
Remember, technology is for business and choosing the most suitable solution is what matters. Hopefully, this guide will help you take the road less traveled and build your own agent pool successfully.
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