Zillow Real Estate Data: Price Trend Collection

The Invisible Threshold of Zillow Data Collection

The old iron engaged in real estate data analysis know that the Zillow website is hiding a mountain of gold, but when you really go to dig it, you are always stopped at the door. Last week, a buddy in Hangzhou complained that he wrote a Python script to catch the trend of housing prices, but the result was that the IP was blocked to death just after running for half an hour. This situation is too common, and many newbies tend to ignore it!The three axes of website anti-crawl: IP Frequency Detection, Behavioral Characteristics Identification, Request Header Verification.

The fatal flaws of ordinary agents

A lot of proxy service providers on the market blowing sky-high, the actual use of the exposed. Last year, I tested a certain service provider that claimed to have a million IP pools:

import requests
proxies = {'http': 'http://123.xx.xx.xx:8080'}
resp = requests.get('https://www.zillow.com/', proxies=proxies)
print(resp.status_code) The probability of returning 403 is as high as 60%

this kind ofLow-quality agentsThe most pitiful thing is that it will produce collateral damage - not only will the target website block you, but you may also have your account blacked out by the proxy service provider. Especially the collection of sensitive data such as Zillow, the purity of the IP requirements are much higher than ordinary websites.

Real-world solutions for ipipgo

We've given technical support to more than 20 property data teams and have concluded thatThree-layer protection program::

 Example of Exclusive IP Configuration with ipipgo
from selenium.webdriver import ChromeOptions

options = ChromeOptions()
options.add_argument("--proxy-server=http://user:pass@gateway.ipipgo.com:9023")
options.add_argument("--disable-blink-features=AutomationControlled")

The key is to grasp three details:

1. Residential IP mixing ratio: It is recommended to switch 1 residential IP for every 50 pages collected
2. Request interval jitter: Don't use a fixed 3 seconds, you should set a random wait of 2-5 seconds
3. Header fingerprinting: In particular, the field Sec-Ch-Ua-Platform should be dynamically generated.

A list of configurations that even a novice can get started with

Here's a plug-and-play configuration form, just copy it:

Frequently Asked Questions QA

Q: Why is it still recognized after using a proxy?
A: Ninety percent are browser fingerprint leaks, remember to add these two lines to your code:
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_argument("--disable-web-security")

Q: Do I need to maintain ipipgo's IP myself?
A: Not at all! TheirIntelligent Routing SystemIt will automatically exclude the blocked IP, which is much more worrying than changing it manually. A customer in Nanjing ran for 72 hours without interruption, the stability of the actual test is really top.

Q: What happens to the collected data?
A: Focus on those three fields:
1. Transaction history in the zsgd-home-details tab
2. The data-json attribute of a line chart of house price projections
3. Renovation records in listing descriptions (regular match brenob keyword)

Anti-Rollover Guide

Lastly, Zillow's anti-crawling team recently upgraded its detection model, and these two potholes should not be stepped on:
1. Don't go on a mining spree at 3:00 a.m. (their defenses are most sensitive at this time of day)
2. encounter authentication code directly give up the current IP, use ipipgo'sAuto Fuse FunctionIt's better to cut new IPs than to tough them out.

If you are looking for a reliable proxy service, go directly to the ipipgo website and open a test account. They are giving away 5G of traffic for new users, enough to try out if the collection program is reliable or not. Remember to use the promo codeZILLOW2024Being able to get 20% off is much better than the second hand dealers on the market.