python dynamic web crawler | JS rendering crack and proxy IP integration program

When Crawlers Hit Dynamic Web Pages: The Pitfalls We Treaded All Those Years Ago

The old Zhang last week is still in the happy crawler suddenly hung up, the page data is dead to catch not all. It turns out that the site has changed to JS rendering and loading, and the traditional requests library is in hibernation. This dynamic loading is like the supermarket to hide the goods in the automatic door behind, do not press the switch door will not give you to see the shelves.

It's time to bring out ourThe Three Musketeers of the Headless Browser-Selenium, Playwright, Puppeteer. they can simulate a real person to operate the browser, and wait for the JS to finish executing before grabbing the data. But the problem comes, frequent visits are like repeatedly jumping across the door of a supermarket, the security guard (anti-crawling system) will give you a seal in minutes.

Alternative ways to open proxy IPs

Instead of fighting the anti-climbing mechanism, you should learn tocamouflageThe residential proxy IPs provided by ipipgo are like preparing countless real IDs for your crawlers, so you can change to a new identity every time you visit. Especially their dynamic IP pool, every time you connect to automatically switch IP, than the Monkey King's seventy-two changes more skillful.

Hands-on with building an anti-blocking crawler

Here is an example of an e-commerce price monitor (we won't name specific sites):

from selenium import webdriver
from ipipgo_proxy import get_proxy Assume this is the SDK for ipipgo_.

def init_driver(): proxy = get_proxy(type='dynamic')
    proxy = get_proxy(type='dynamic') call dynamic residential IPs
    options = webdriver.ChromeOptions()
    options.add_argument(f'--proxy-server={proxy}')
    return webdriver.Chrome(options=options)

driver = init_driver()
driver.get('Target URL')
 Remember to add a reasonable wait time here, so you don't look like you're starving to death!

There are just three key tips:random residence time (RTL),Mouse track simulation,IP rotation strategy in conjunction with ipipgo. Their API supports switching IPs on a minute-by-minute basis, which is especially suitable for scenarios that require high-frequency access.

Oddball problems encountered in the real world

1. What should I do if my certificate reports an error?
ipipgo's HTTPS proxy comes with SSL certificate hosting, just add two lines in the code to ignore certificate validation:

options.add_argument('--ignore-certificate-errors')

2. What do I do when I encounter human verification?
At this point it's time to get on a CAPTCHA cracking service, but the more recommended approach is toReducing the frequency of visitsThe IP pool of ipipgo is large enough that reasonable control of request intervals is the way to go.

QA time: the common mines that newbies step on

Q: Slow proxy IP speed affects efficiency?
A: It's important to pick the right node location, ipipgo'sIntelligent RoutingIt automatically matches the fastest lines. Don't be stupid and use a US IP to crawl Asian sites, it's a hell of a lot faster.

Q: How do I know if the proxy is active?
A: Add a detection logic in the code, or just use the ipipgo provided by theOn-line detection interface. Their control panel also allows you to view IP usage in real time, which is easier than checking your water meter.

Q: How to choose between dynamic IP and static IP?
A: Need to maintain the session for a long time (e.g. login state) with static, general data collection with dynamic. ipipgo supports both.Ready to switch, no need to get entangled.

One final note: the reptile business is all about thestop before going too far (idiom); to stop while one can.. With ipipgo's 90 million + residential IP protection, coupled with a reasonable anti-anti-crawl strategy, basically can handle the market 90% dynamic web pages. But don't take the other server as their own backyard garden casually stroll, or really will be invited to drink tea.