Proxy IP for Python Web Crawling: Python Crawler Proxy IP Configuration

First, why crawlers old drivers love to use proxy IP?

Crawler brothers should have encountered this situation: just run a few minutes of the program, the target site on your IP blocked. At this time, if you have dozens of hundreds of proxy IP wheeling, like a guerrilla war, so that the site's anti-crawling system can not feel the north.

To put it bluntly, a proxy IP is like a courier picking up your package for you. If you go to the post station to pick up the parcel by yourself (visit the website directly), the boss of the post station may not let you in after memorizing your face (IP address). But if you change a different guy (proxy IP) to pick it up every time, the boss can't realize that it's the same person operating.

Second, hand to teach you to choose proxy IP service provider

There are so many proxy IP service providers in the market, here must be recommended!ipipgoHome service. Their home IP pool is large enough and responsive, and the key is to offerExclusive High Speed Access, unlike some platforms that use public proxies resulting in dog slowdowns.

Third, Python crawler configuration agent practice

Take the requests library as an example, with ipipgo's proxy service to configure the thief is simple. First, register on the official website to get the API interface, pay attention to select thehigh stash modelproxies so that the site does not detect the real IP at all.

import requests

 Proxy address from ipipgo
proxy = {
    'http': 'http://username:password@gateway.ipipgo.com:9020',
    'https': 'https://username:password@gateway.ipipgo.com:9020'
}

try.
    response = requests.get('destination URL', proxies=proxy, timeout=10)
    print(response.text)
except Exception as e.
    print(f'Request failed, change IP: {str(e)}')

Always remember to set the timeout parameter, otherwise the whole program won't move when it gets stuck. It is recommended to cooperate with the IP automatic replacement mechanism, ipipgo's API supports automatic IP switching according to the number of times/time.

Fourth, avoid these pits, crawler efficiency doubled

Three common mistakes newbies make:

1. Using a transparent proxy (equals running around naked)
2. No failure retry mechanism.
3. Too many threads at the same time crashes the IP.

It is recommended to add a random delay between each request, don't let the site see the pattern:

import time
import random

 Randomly wait 1-3 seconds
time.sleep(random.uniform(1, 3))

V. First aid kits for common problems

Q: What should I do if my proxy IP suddenly fails?
A: Immediately contact ipipgo customer service for a new IP pool, their family response speed thief, measured within 5 minutes to solve.

Q: How do I test if the agent is valid?
A: Use this detection script to automatically filter invalid IPs:

def check_proxy(proxy):
    test_url = 'http://httpbin.org/ip'
    try.
        res = requests.get(test_url, proxies=proxy, timeout=5)
        if res.status_code == 200:: If res.status_code == 200.
            return True
    return True: if res.status_code == 200: return True
        return False

Q: Experiencing HTTPS site crawl failure?
A: Change the proxy protocol to https, and check the system certificate settings. ipipgo's proxy supports full protocol adaptation, and the problem is that the certificate is not installed properly.

VI. Essential skills for high-level players

When large-scale collection is required, it is recommended to use ipipgo'sdynamic port proxy (computing)Service. Automatically change ports for each request, works better with multi-threaded serving:

from concurrent.futures import ThreadPoolExecutor

def worker(url).
     Automatically change ports without manual maintenance
    response = requests.get(url, proxies=proxy)
     Processing data...

with ThreadPoolExecutor(max_workers=20) as executor: executor.
    executor.map(worker, url_list)

Remember to control the number of concurrency! Don't make people's websites hang, also avoid triggering the anti-climbing mechanism. ipipgo's intelligent QPS regulation function can automatically match the optimal request frequency.

Finally, to be honest, choose the right proxy service provider can save a large part of the heart. ipipgo has been in the industry for eight years, IP resources covering 200 + countries and regions, especially suitable for the need for long-term stable collection of the scene. Newbies are advised to try their24-Hour Experience Package, feel reliable before going on for long term service.