Image grabbing tool: image proxy grabbing program

First, why the image capture always overturned? You may be planted in these pits

Brothers engaged in image capture should have encountered this kind of shit: scripts run well suddenly on the break, the site's anti-crawler mechanism with the opening of the hang like to catch people. The most common ones areIP blockedThe first thing you need to do is to download a lot of data from the website, especially when downloading in bulk, and the same IP will be blacked out in minutes when accessing at high frequency. Some sites are even more ruthless, directly give you a pop-up verification code, or return to the fake data to fool people.

This is the time to proxy IP on the field. It is like playing a game to open a small number, each visit to change the armor, so that the site thinks it is a different user in the operation. However, the proxy services on the market are uneven, many claim to be millions of IP pools, the actual use of all thehot chickenWaste IP.

Second, picking a proxy IP is like looking for an object These three indicators must be looked at

You can't just look at price when choosing an agency service, you have to focus on these three things:

In particular, I'd like to say.IP purityMany agents' IPs have long been marked by major websites for crawlers, and using such IPs is tantamount to throwing oneself into the net. ipipgo has a unique trick - every time before assigning an IP, it will use the target website to do usability testing to ensure that the ones it gets its hands on are alllive IPThe

Third, hand to teach you to ride the proxy capture program

Taking the Python requests library as an example, the core is just three steps:

import requests
from itertools import cycle

 List of proxies provided by ipipgo (example)
proxy_pool = [
    "203.34.56.78:8000",
    "112.89.129.101:8800",
    "45.76.222.12:3128"
]
proxy_cycle = cycle(proxy_pool)

def download_image(url):: for _ in range(3): fail_test_image(url)
    for _ in range(3): failed to retry 3 times
        current_proxy = next(proxy_cycle)
        current_proxy = next(proxy_cycle)
            resp = requests.get(url, proxies={
                "http": f "http://{current_proxy}", "https": f "http://{current_proxy}",
                "https": f "http://{current_proxy}"
            }, timeout=8)
            return resp.content
        except.
            continue
    return None

Be careful to set thetimeoutrespond in singingautomatic switchingIf you encounter a lag, you can change your IP immediately. ipipgo's API supports on-demand IP extraction, and it is recommended that you dynamically obtain the latest proxy before each capture, which is much more reliable than a fixed IP pool.

IV. Guide to avoiding pitfalls in actual combat (blood and tears experience)

1. Don't believe in free agents.: Those public free proxy IPs, 9 out of 10 are phishing, and the remaining 1 has been used up long ago!

2. Control request frequency: Even if you use a proxy, don't send requests at random intervals of 1-3 seconds, to simulate the operation of a real person!

3. Regular cache clearing: Some websites remember cookies, so remember to use the no-trace mode or clean up your session regularly!

4. Mixed Use Agreement: ipipgo supports HTTP/HTTPS/Socks5 protocols, flexible switching for different websites!

V. Frequently Asked Questions QA

Q: Why do I still get banned after using a proxy?
A: There are two possible situations: 1. IP quality is not good 2. behavioral characteristics are too obvious. It is recommended to turn on the ipipgo backgroundauto-rotation modeThe IP address is automatically changed every 5 minutes.

Q：Downloading pictures always report 403 error?
A: 80% of the header is not set properly, remember to bring User-Agent and Referer. ipipgo's browser fingerprinting function can directly generate a full set of request headers.

Q: Overseas website image crawling is especially slow?
A: Try ipipgo'sExclusive Overseas Routes，他们家在欧美东南亚都有服务器节点，跨境传输有代理ip优化。

Finally nagging, now anti-climbing technology is getting smarter and smarter, just by changing IP is not enough. It is recommended to cooperate with ipipgo'sIntelligent Dispatch SystemThe ability to automatically adjust the crawling strategy according to the target site is a real heart-saving solution.