Glassdoor Data Collector: Enterprise Evaluation Capture Solution

A. Why is your Glassdoor collection always blocked?

The old iron engaged in data collection should have encountered this situation: just grabbed a few hundred pieces of data, the IP address was pulled by Glassdoor black. It's just like when you go to the supermarket to try food and catch the same counter, who will the security guards watch if not you?

Glassdoor's anti-crawl mechanism is smarter than one might think, and they look at three main metrics:Access frequency, IP attribution, device fingerprints. The business reviews page, in particular, is extremely sensitive to successive visits from the same IP. I've seen a buddy hardcore with his own broadband, and as a result, he couldn't even log into Glassdoor on his company WiFi the next day.

Second, the correct posture of changing IP

The IP change mentioned here is not for you to reboot your optical cat (although that works sometimes), but to use theDynamic Residential AgentsThe first thing you need to do is to get the information from a real home broadband service provider. As a chestnut, service providers like ipipgo have millions of real home broadband addresses around the world stored in their IP pools, which are randomly switched for each request, so that the site can't tell if it's a real person visiting or a machine operating.

import requests
from itertools import cycle

 The proxy format provided by ipipgo
proxy_list = [
    'http://user:pass@gateway.ipipgo.com:8000',
    'http://user:pass@gateway.ipipgo.com:8001', ...
     ... More proxy nodes
]
proxy_pool = cycle(proxy_list)

for page in range(1, 100): proxy = next(proxy_pool)
    proxy = next(proxy_pool)
    try: response = requests.get()
        response = requests.get(
            f'https://www.glassdoor.com/Reviews/page_{page}',
            proxies={'http': proxy, 'https': proxy},
            timeout=10
        )
         Parsing data...
    except Exception as e.
        print(f'Planted with {proxy}: {str(e)}')

Third, ipipgo practical configuration program

There are many proxy service providers on the market, but you have to look at the hard indicators to do data collection. Recommended ipipgo mainly because of three points:

Here's the kicker.Request header settingsIt is recommended to randomly change the browser fingerprint every 5 IP switches. Here's a tip - just grab the real UA of a commercially available browser and use it.

Fourth, the white guide to avoid the pit

Three common fatal mistakes newbies make:

1. Setting the delay too low (3-8 second random intervals recommended)
2. Forget about handling JavaScript rendering (remember to turn off the WebDriver property with Selenium)
3. Reuse of session cookies (cookies must be cleared every time you change IP)

Last time, a customer could not crawl the data, and later found that he opened the browser plug-in, each request with a Google account authentication information, which is not the same as holding up the ID card to crawl the data it ...

V. Practical QA First Aid Kit

Q: What should I do if I encounter a CAPTCHA?
A: Immediately stop the request of the current IP, and reduce the collection speed after changing to a new IP. ipipgo'sIntelligent RoutingFunction can automatically filter high-risk IP segments

Q: Need to collect data from different countries?
A: Add the region parameter to the proxy request, such as with ipipgo'sgateway.ipipgo.com?country=usYou can get a U.S. residential IP

Q: How much IP volume is needed per day?
A: Estimated by empirical value: target data volume ÷ (daily limit per IP). Assuming that we want to catch 100,000 items, Glassdoor has a daily limit of 300 items per IP, and it is recommended to prepare 400 quality IPs (leaving 20% margin)

VI. Long-term maintenance tips

Don't think you can rest on your laurels after configuration, it is recommended to do these things weekly:

• Check IP availability (ipipgo has real-time monitoring in the background)
• Updated XPath positioning rules (site revisions are common)
• Clear local DNS cache (raise your hand if you've encountered domain name resolution pollution)

One last piece of cold knowledge: Glassdoor is much more tolerant of mobile IPs. With ipipgo's 4G/5G mobile proxy pool, the collection success rate can go up another 15% or so. But remember to control the rhythm of the request, do not read the good scripture to the wrong.