Proxy IP Auto Switching Tool|Python/Scrapy Auto Change IP Scripts

First, why does your crawler project need to automatically switch proxy IP?

If you have done network data collection, you know that frequent use of a fixed IP to access the target site, the light is encountered CAPTCHA blocking, the heavy is directly blocked IP. especially the need for long-term operation of the crawler project, manually replace the proxy IP is neither realistic nor efficient. At this time, you need to change the proxy IP manually throughThe program automatically switches proxy IPsto maintain stable operation.

Take e-commerce price monitoring as an example, suppose you want to capture the price data of 100,000 items of a platform in real time:

Second, Python to realize the proxy IP automatic switching of the 3 methods

Here is a list of all of the products that are available in theipipgo Dynamic Residential IPAs an example, to demonstrate the specific implementation:

Method 1: Dynamically change IP before request

import requests
from ipipgo import get_proxy Assume this is the SDK provided by ipipgo.

def crawler(url): proxy = get_proxy()
    proxy = get_proxy() get new IP per request
    proxies = {"http": f "http://{proxy['user']}:{proxy['pass']}@{proxy['ip']}:{proxy['port']}"}
    response = requests.get(url, proxies=proxies)
    return response.text

Method 2: Failure automatic retry mechanism

MAX_RETRY = 3
def retry_crawler(url):: for _ in range(MAX_RETRY)
    for _ in range(MAX_RETRY):
        try: proxy = get_proxy()
            proxy = get_proxy()
            response = requests.get(url, proxies=proxies, timeout=10)
            return response
        except Exception as e.
            print(f "IP {proxy['ip']} failed, auto switching")
    return None

Method 3: Rotate the IP pool regularly

import time
from threading import Thread

class IPManager.
    def __init__(self).
        self.ip_pool = []
        Thread(target=self._refresh_ips).start() start background update thread

    def _refresh_ips(self).
        Start the background update thread. while True: self.ip_pool = get_ip_pool.
            self.ip_pool = get_proxy(count=50) bulk IP acquisition
            time.sleep(300) update IP pool every 5 minutes

III. Best Practices for Integrating Proxy IP with the Scrapy Framework

In Scrapy projects, it is recommended to use middleware for automated management:

class IPIPGoProxyMiddleware.
    def process_request(self, request, spider): proxy = get_proxy().
        proxy = get_proxy()
        request.meta['proxy'] = f "http://{proxy['ip']}:{proxy['port']}"
        request.headers['Proxy-Authorization'] = basic_auth_header(proxy['user'], proxy['pass'])

    def process_exception(self, request, exception, spider):
        return request.replace(dont_filter=True) auto-retry new ip

configureipipgo dynamic ipAttention is required when:

• Set concurrency in settings.py (recommended ≤ 3 requests per second for a single IP)
• Enable RetryMiddleware for use with
• It is recommended to turn on the automatic de-weighting function

IV. Selection Strategies for Dynamic vs. Static Agents

ipipgo provides two types of proxies at the same time, according to business needs can be switched at any time in the console, and supports HTTP/HTTPS/SOCKS5 all protocols to meet the needs of different technology stacks.

V. Frequently Asked Questions QA

Q: How to handle automatically when the proxy IP is invalid?
A: It is recommended to incorporate an exception retry mechanism to immediately re-initiate the request with a new IP when a connection timeout, 403 status code, etc. is captured.

Q: How can I avoid being recognized by websites as proxy traffic?
A: ipipgo's residential IPs are all from real home networks and work better with the following measures:
1. Randomization of User-Agent settings
2. Controlling the frequency of requests
3. Simulating browser behavior

Q: How are multi-region IPs scheduled?
A: Just specify the country/city parameter when getting the proxy, for example:

proxy = get_proxy(country='us', city='los_angeles')

Q: How do I ensure stability when I need a large number of IPs?
A: It is recommended to use the IP pool rotation mechanism to obtain bulk IP resources in advance, together with connection pool management tools (such as aiohttp) to achieve efficient reuse.