Concurrent page loading in headless browser using PhantomJS

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1

Hey folks,

I’m trying to figure out how to load multiple web pages at the same time using PhantomJS. I’m working with Python and using Selenium with Ghostdriver.

From what I understand, PhantomJS runs in its own thread and can handle multiple tabs. But I’m stuck on how to make the page loading non-blocking. I want to be able to start loading several pages and then do other stuff while they’re loading.

Has anyone done this before? I’m open to any ideas. Maybe there’s a Ghostdriver method I missed? Or should I ditch Ghostdriver and talk to PhantomJS directly? I’m even willing to try a different headless browser if that would work better.

Thanks in advance for any help or tips you can give me!

# Example of what I'm trying to do
browser = webdriver.PhantomJS()
browser.get('http://example1.com')  # This blocks
browser.get('http://example2.com')  # This blocks too
# How can I make these non-blocking?

Cheers,
Alex

2

I’ve encountered similar challenges with concurrent page loading. While PhantomJS with Selenium can be tricky for this, I’ve found success using Python’s concurrent.futures module. It allows you to execute calls asynchronously, which could work well for your use case.

Here’s a basic approach you might consider:

from concurrent.futures import ThreadPoolExecutor
from selenium import webdriver

def load_page(url):
    browser = webdriver.PhantomJS()
    browser.get(url)
    # Process page as needed
    browser.quit()

urls = ['http://example1.com', 'http://example2.com', 'http://example3.com']

with ThreadPoolExecutor(max_workers=3) as executor:
    executor.map(load_page, urls)

This method spawns separate threads for each page load, allowing them to run concurrently. It’s been quite effective in my projects, offering a good balance of simplicity and performance. Just be mindful of resource usage if you’re loading many pages simultaneously.

3

I’ve been down this road before, and I can tell you that PhantomJS with Selenium isn’t the best choice for concurrent page loading. In my experience, Playwright has been a game-changer for this kind of task. It’s more modern and supports asynchronous operations out of the box.

Here’s a rough idea of how you could approach this with Playwright:

import asyncio
from playwright.async_api import async_playwright

async def load_page(url):
    async with async_playwright() as p:
        browser = await p.chromium.launch()
        page = await browser.new_page()
        await page.goto(url)
        # Do whatever you need with the page
        await browser.close()

async def main():
    urls = ['http://example1.com', 'http://example2.com']
    await asyncio.gather(*[load_page(url) for url in urls])

asyncio.run(main())

This way, you can load multiple pages concurrently without blocking. It’s been a real time-saver in my projects. Just remember to handle exceptions properly in a real-world scenario.

4

hey alex, i’ve worked thru this before. try using asyncio with aiohttp so that you can load pages async. it may take some tweaking, but it wont block your other tasks. good luck!