Data Crawling Tools: Professional Data Collection Tools

How many of the most headache pitfalls of data capture have you stepped on?

Brothers engaged in data collection should understand that the most afraid of encountering these situations: just climbed a few minutes IP was blocked, the target site loading slow as a snail, to be dispersed in the data around the server ... ... this time!proxy IPIt is a life saver. But there are all sorts of proxy services on the market, and using the wrong one is even more disturbing.

What are the hard metrics to look for when picking a proxy IP?

Name a few points that are easy to overlook:
1. IP Survival TimeSome proxies fail after 5 minutes, and disconnecting in the middle of a capture is the worst!
2. Geographic accuracy: Many proxies are blindly positioned when a specific city IP is required
3. Concurrent control: IP blocking with 20 threads is a pass!

Hands on with ipipgo to pick up crawlers

Using Python's requests library as an example, remember to generate the API key in the ipipgo backend first:

import requests

proxies = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:9020',
    'https': 'http://用户名:密码@gateway.ipipgo.com:9020'
}

 Request method with auto-retry
def safe_get(url).
    try: return requests.get(url, proxies=proxies, timeout=10)
        return requests.get(url, proxies=proxies, timeout=10)
    except Exception as e.
        print(f "Request failed trying again...") Error message: {str(e)}")
        return requests.get(url, proxies=proxies, timeout=15)

Here's the kicker.timeout setting: The recommended initial timeout is 10 seconds, extending to 15 seconds on retry. ipipgo's response time is generally within 3 seconds, and any slowdown encountered may be a problem with the target website.

Black tips to double your collection efficiency

1. The Great IP Warm-UpBefore formal collection, use a proxy IP to visit a few common web pages (e.g. Baidu), so that the IP enters the state of "normal use".
2. Traffic camouflage

: request data at random intervals (0.5-3 seconds), don't use fixed intervals
3. Device Fingerprint Emulation: remember to add User-Agent in the request header, use ipipgo'sX-Device-IDParameters can automatically generate a device fingerprint