Proxy Keepalive

When scraping a dynamic list where the content is loaded dynamically, you often need to use a web scraping library that supports interaction with JavaScript or a headless browser. The selenium library is a popular choice for this task.

Below is an example of scraping a dynamic list from a website using Python with selenium. In this example, the list items are loaded dynamically through JavaScript, and we'll use selenium to interact with the page.

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# Replace 'your_url' with the actual URL of the page
url = 'your_url'

# Initialize the webdriver (you may need to download the appropriate webdriver for your browser)
driver = webdriver.Chrome()

# Open the webpage
driver.get(url)

# Use WebDriverWait to wait for the dynamic content to load
try:
    # Adjust the timeout and conditions based on your webpage's behavior
    WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.XPATH, '//div[@class="your-list-item-class"]'))
    )

    # Extract the list items using XPath (adjust the XPath based on your HTML structure)
    list_items = driver.find_elements(By.XPATH, '//div[@class="your-list-item-class"]')

    # Process the list items
    for index, item in enumerate(list_items):
        print(f"Item {index + 1}: {item.text}")

finally:
    # Close the browser window
    driver.quit()

In this example:

• Replace 'your_url' with the actual URL of the page you want to scrape.
• Adjust the XPath in driver.find_elements based on the structure of your HTML. This XPath should point to the dynamic list items.

Remember to install the selenium library (pip install selenium) and download the appropriate WebDriver (e.g., ChromeDriver) for your browser.

In Selenium with Python, you can set the name of the downloaded file by using the set_preference() method on the Options object before initializing the WebDriver. Here's an example using Chrome:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

# Set the path to the ChromeDriver executable
chrome_driver_path = "path/to/chromedriver"

# Set the preference to save downloaded files with a specific name pattern
options = Options()
options.add_argument("download.default_directory='path/to/download/folder'")
options.add_argument(f"download.download_path='path/to/download/folder'")
options.add_preference("download.filename_template", "%f - %r")

# Initialize the Chrome WebDriver with the specified options
driver = webdriver.Chrome(executable_path=chrome_driver_path, options=options)

# Your Selenium code goes here

# Close the browser
driver.quit()

Replace path/to/chromedriver, path/to/download/folder, and %f - %r with the appropriate values for your setup. The %f placeholder is replaced by the file name, and the %r placeholder is replaced by the original file name.

This example sets the download directory and the filename template for downloaded files. When a file is downloaded, it will be saved with a name that includes the original file name and a unique identifier, separated by a dash.

Keep in mind that this approach sets the download preferences for the entire browser session. If you need to change the download preferences for a specific test, you can set them before the test runs and reset them afterward.

When using a proxy, Google Chrome warns the user about it at startup. To connect directly, you must disable proxies at system level. That is, go to "Settings" Windows, then - "Network and Internet", in the section "Proxy server" disable the corresponding item.

The reason for the lack of connection to the network can be due to incorrect proxy settings, that is, incorrect IP addresses were entered or specified, or the server simply does not work. Users also often forget that proxy settings must be disabled.

It depends on which browser you are using. In Opera, Chrome, Edge a proxy is configured at the level of the operating system itself. In Firefox in the settings there is a special item (in the "Privacy" section).