Efficient Infinite Scroll Data Scraping in Python

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#1

I want to scrape all the data of a page implemented by a infinite scroll. The following python code works.

The code i am using is : for i in range(100): driver.execute_script("window.scrollTo(0, document.body.scrollHeight);") time.sleep(5)

I currently wait for 5 seconds every time I scroll down to allow the page to load new content. However, this might not be the most efficient approach. I want to find a way to detect when the page has finished loading new content, so I can scroll down again without unnecessary waiting. This will help me save time and have a smoother browsing experience.

1 Like
#2

Hey arpana! So, when it comes to Puppeteer Sharp, implementing “stealth” can be quite intriguing. Let’s see it a bit more with an example.

var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = false // For visibility during testing
});
var page = await browser.NewPageAsync();
await page.SetUserAgentAsync("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134");

// Additional configurations for stealth go here

await page.GoToAsync("https://example.com");
1 Like
#3

let’s incorporate some more stealth techniques into our Puppeteer Sharp script. One crucial aspect is handling bot detection through JavaScript manipulation. Here’s how you can dynamically alter JavaScript properties to mimic human behavior:

await page.EvaluateFunctionAsync(@"() => {
    Object.defineProperty(navigator, 'webdriver', {
        get: () => false,
    });
    Object.defineProperty(navigator, 'plugins', {
        get: () => [1, 2, 3, 4, 5],
    });
    Object.defineProperty(navigator, 'languages', {
        get: () => ['en-US', 'en'],
    });
}");

By tweaking these properties, we can make our bot appear more human-like, thereby reducing the chances of detection. Remember, staying up-to-date with anti-bot measures is crucial for maintaining stealth.

#4

we can further enhance stealth in Puppeteer Sharp by mimicking human interaction patterns. One effective technique is to introduce random delays between actions to simulate natural browsing behavior:

await page.EvaluateFunctionAsync(@"() => {
    const originalQuerySelector = Element.prototype.querySelector;
    Element.prototype.querySelector = function(selector) {
        const element = originalQuerySelector.call(this, selector);
        if (element) {
            const milliseconds = Math.floor(Math.random() * 1000) + 500; // Random delay between 500ms and 1500ms
            return new Promise(resolve => setTimeout(() => resolve(element), milliseconds));
        }
        return element;
    };
}");

By introducing these random delays, we emulate the variability in human browsing, making our Puppeteer Sharp script less predictable and hence more stealthy. Remember, the key to effective stealth lies in continuously adapting and refining these techniques to stay ahead of detection mechanisms.