Crawler http proxy ip | Python crawler anti-blocking strategy and data collection practices

Why are crawlers always blocked? Look for your own reasons first

Brothers engaged in crawling have encountered this situation: yesterday was running a good program, today suddenly 403. Don't be in a hurry to scold the website stingy, first check whether you are in theCrazy output on the same IP address. Just like you go to the convenience store to buy cigarettes ten times in a row, the clerk does not call the police is strange! Especially when engaged in data collection, high-frequency access is like bouncing on the web server, not to block you block who?

The right way to open a proxy IP

That's when it's time toproxy IPIt's out. The principle is particularly simple, like every time you go out and change different clothes. For example, with ipipgo's residential IP pool, each request randomly change a real home network address, the site can not tell whether you are a real person or program.

Here's a pitfall to watch out for:Don't use those public free agents.I've tried it before. I've tried it before, 9 out of 10 can't connect, and the remaining one is even slower than a snail. Professional things are still left to professional tools, such as ipipgo such as specializing in proxy services, IP pool is large enough to have automatic verification mechanism, with only solid.

Python real-world anti-blocking three-pronged axe

Here I am sharing my private configuration scenario for the requests library as an example:

import random
from itertools import cycle

 API extraction links provided by ipipgo
PROXY_API = "Your proprietary proxy link"

def get_proxies():
     Here we actually call ipipgo's API to get the latest list of proxies
    return [f"{ip}:{port}" for ip, port in ip_list]

proxy_pool = cycle(get_proxies())

def make_request(url).
    for _ in range(3): retry 3 times
        proxy = next(proxy_pool)
        try.
            response = requests.get(url, proxies={"http": proxy, "https")
                proxies={"http": proxy, "https": proxy}, timeout=10, timeout=10, proxy_pool, proxy_pool, proxy_pool, proxy_pool, proxy_pool
                timeout=10,
                headers=random.choice(headers_list))
            return response
        except Exception as e.
            print(f "Proxy {proxy} failed, switching to next one automatically")
    return None

Here's the key point.Automatic rotation of agent pools+Random request header+timeout and retryipipgo supports socks5/http/https protocols, remember to choose the corresponding protocol type according to the actual situation.

Guide to Avoiding the Pit: 90% Newbies Make Mistakes

1. Proxy intervals are not set appropriately: don't think you can do whatever you want just because you changed your IP, we suggest adding random delay (0.5-3 seconds)

2. Ignoring Cookie Management: Remember to clear your cookies every time you change your IP address, or you'll be left in the dark.

3. Stick to a certain site.: Try ipipgo's for extra tight protection.High Stash Residential IPI've tested some of the e-commerce platforms and they work great!

Practical QA triple question

Q: How to test whether the proxy IP is valid?
A: First test the target site with a small batch of IPs, focusing on the response code and return content. ipipgo's background has real-time availability monitoring, which is much more convenient than writing your own test script.

Q: How to choose between dynamic and static IP?
A: need to maintain long-term session selection of static IP (such as to maintain the login state), the ordinary collection of dynamic IP safer. ipipgo two types are supported, in the background can be switched at any time.

Q: What should I do if my proxy IP is blocked?
A: Immediately stop the use of the IP, check the reason for triggering the blocking (may be the request frequency is too high). ipipgo's IP pool is automatically updated every day, and blocked IPs will be automatically downgraded, which is especially friendly to developers.

At the end of the day, proxy IP is not a panacea, and it is crucial toCooperate with canonical crawler behaviorIt's like driving a car. It's like driving a car, even the best tires can't hold you up against a wall. Think of ipipgo's proxy service as a Swiss Army Knife in your toolbox, and with a reasonable acquisition strategy, you can acquire data stably over the long term.