Crawling images from websites: web image crawling solutions

First, why is image capture always blocked? Maybe it's the IP that's causing the problem

Engaged in the web crawler friends understand, hard work to write a good capture script, running suddenly stopped. Browser returns 403, blocking prompts, and even direct IP blocking - this thing is in all likelihood the site recognizes theHigh-frequency visit characteristicsIt's a good idea. Ordinary users visit the site, the server to see the IP address are dynamic changes, but we use the script to capture the data, IP address is like an ID card by the site in a small book.

To give a practical example: an e-commerce platform to catch competing products map, single with a fixed IP continuous request, less than half an hour will be recognized as a crawler. At this time it is necessary toproxy IP poolto simulate real user behavior and make the server think that each request is operated by a different person.

Second, hand to teach you to use proxy IP capture map

Here's an example of Python showing how to implement secure capture via ipipgo's proxy service:

import requests
from bs4 import BeautifulSoup

 Configure the ipipgo proxy parameters (remember to replace them with your own account)
proxy_api = "https://api.ipipgo.com/get?key=你的密钥&format=json"

def get_proxy():
    resp = requests.get(proxy_api).json()
    return f "http://{resp['ip']}:{resp['port']}"

url = "Target image web address"
headers = {'User-Agent': 'Mozilla/5.0'}

 Change proxy IP for each request
proxies = {'http': get_proxy(), 'https': get_proxy()}
response = requests.get(url, headers=headers, proxies=proxies, timeout=10)

 Parsing and downloading images
soup = BeautifulSoup(response.text, 'html.parser')
for img in soup.find_all('img')::
    img_url = img['src']
    with open(img_url.split('/')[-1], 'wb') as f.
        f.write(requests.get(img_url, proxies=proxies).content)

Focused Reminder:

1. A reasonable request interval must be set (3-5 seconds recommended)
2. User-Agents should be rotated randomly.
3. https/http proxy to be configured separately

Third, what are the doorways to look for when choosing a proxy IP?

There are all sorts of agency services on the market, so here's a comparison table for the guys:

Anyone who has used ipipgo knows that their homeDynamic Residential IPEspecially good for image capture. This type of IP is identical to the characteristics of ordinary home broadband, the site can not tell whether it is a real person visiting or a machine operation.

IV. Practical guide to avoiding pitfalls

Recently, I encountered a typical problem when I helped a customer to crawl a gallery website: obviously, I used a proxy IP, but it still triggered the CAPTCHA. We found that the problem was caused byCookie Carrying Problems-The browser fingerprints were not cleaned up even though the IP was changed. The solution is simple:

 Wrap the proxy settings outside of requests.Session()
session = requests.Session()
session.proxies.update({'http': get_proxy(), 'https': get_proxy()})

Another recommended tip: use ipipgo'squantity-based billing packageThis will save at least 40% in cost by deactivating it as soon as the capture project is over.

V. Quick questions and answers to frequently asked questions

Q: What should I do if the proxy IP speed is slow and affects the download?
A: Go with ipipgo'sBGP lineIt supports automatic selection of the optimal node. The actual download speed can be up to 8MB/s, which is more than 3 times faster than normal proxy.

Q：How to break the anti-stealing chain of images?
A: Just add the Referer field in the request header:

headers['Referer'] = 'Source page URL'

Q: Do I need to maintain the proxy IP myself?
A: Use ipipgo'sIntelligent Dispatch SystemJust don't worry about it, the API will automatically weed out lapsed IPs and also replenish new IPs in real time.

Lastly, a word of caution: image capture is a long-lasting battle, and choosing the right proxy service provider is half the battle. ipipgo has just recently gone live!Free trial for new users, sign up to send 5G traffic, enough for small-scale testing. Friends in need may wish to go to the official website to woolgather, personally try the most reliable results.