Crawler dynamic proxy ip

When crawling on the web, you will often encounter websites blocking IP, then you need to use proxy IP to avoid being blocked. Dynamic proxy IP can realize automatic dynamic switching proxy IP, effectively improve the efficiency and stability of the crawler.

Why do I need to use a proxy IP for crawling?

When crawling, you will often encounter some websites that will block the IP of frequent visitors, which will lead to the crawler not being able to access the website normally. The use of proxy IP can be realized in a period of time to use a different IP address to access the site, to avoid being blocked, to protect the normal operation of the crawler.

In addition, some websites will restrict IPs in certain regions, and proxy IPs can be used to simulate access from different regions and obtain more data.

How to realize dynamic proxy IP

Sample code for dynamic IP requests using Python's requests library and random proxy IPs is given below:

"`ipipgothon
import requests
from bs4 import BeautifulSoup
import random

proxies = [
"http://10.10.1.10:3128",
"https://10.10.1.11:1080",
# ... other proxy IP ...
]

def get_random_proxy().
return random.choice(proxies)

url = 'https://www.example.com'
proxy = get_random_proxy()
response = requests.get(url, proxies={'http': proxy, 'https': proxy})
soup = BeautifulSoup(response.text, 'html.parser')
# Parsing operations on soup here
“`

In the above example, we first define a list of proxy IPs called proxies, and then implement a function called get_random_proxy to randomly select a proxy IP. Then we specify the url of the page we want to access, and use the get_random_proxy function to get a random proxy IP, and use the requests library's get method to make the request. library's get method, which passes in the proxies parameter to specify the proxy IP, and finally we parse the page we get using the BeautifulSoup library.

In this way, we will be able to realize dynamically switching proxy IPs for web crawling, effectively avoiding being blocked and improving the efficiency of the crawler.

Conclusion: Through the use of dynamic proxy IP, we can better cope with the anti-crawler mechanism of the website to ensure the normal operation of the crawler and get more data. I hope the above can help you, and wish you a smooth crawler journey.