Deadline Proxy Server

The most convenient way is to use online proxy checkers, i.e. services that test all connection capabilities, including supported protocols. For example, Hidemy.name or Securitylab. As for applications, you can recommend SocksChain or Open Proxy Checker.

When working with HtmlAgilityPack in C# to scrape identical tags, you can use XPath or LINQ queries to select and iterate over the desired elements. Here's an example using HtmlAgilityPack to scrape links (anchor tags) from an HTML document:

using HtmlAgilityPack;

class Program
{
    static void Main()
    {
        // Load the HTML document (replace with your HTML content or file path)
        HtmlDocument htmlDoc = new HtmlDocument();
        htmlDoc.LoadHtml("Link 1Link 2Link 3");

        // Select all anchor elements
        HtmlNodeCollection links = htmlDoc.DocumentNode.SelectNodes("//a");

        // Iterate over each anchor element and print the href attribute
        if (links != null)
        {
            foreach (HtmlNode link in links)
            {
                string href = link.GetAttributeValue("href", "");
                Console.WriteLine("Link: " + href);
            }
        }
        else
        {
            Console.WriteLine("No links found.");
        }
    }
}

In this example:

• The HtmlDocument class is used to load the HTML content.
• The SelectNodes method with the XPath expression "//a" is used to select all anchor elements.
• The GetAttributeValue method is used to retrieve the value of the href attribute for each anchor element.

Make sure to replace the HTML content in htmlDoc.LoadHtml with your actual HTML or load it from a file.

Adjust the XPath expression or use LINQ queries based on your specific HTML structure and the tags you want to scrape. Remember to handle cases where elements might not exist or contain the desired attributes.

To enable responsive design mode in Firefox using Selenium, you can use the webdriver.FirefoxOptions() class and set the desired options for responsive design. Here's an example in Python:

from selenium import webdriver

# Create Firefox options
firefox_options = webdriver.FirefoxOptions()

# Enable responsive design mode
firefox_options.add_argument('--start-maximized')  # Start the browser in maximized mode
firefox_options.add_argument('--width=800')  # Set the initial width
firefox_options.add_argument('--height=600')  # Set the initial height

# Create the WebDriver instance with the specified options
driver = webdriver.Firefox(options=firefox_options)

# Navigate to a website
driver.get('https://example.com')

# Continue with your Selenium script...

# Close the browser when done
driver.quit()

In this example:

• --start-maximized: Opens the browser window in maximized mode.
• --width=800: Sets the initial width of the browser window to 800 pixels.
• --height=600: Sets the initial height of the browser window to 600 pixels.

You can adjust the width and height values based on your specific requirements.

Please note that the responsiveness of the design is primarily determined by the CSS media queries and how the website is designed to handle different viewport sizes. Changing the browser window size using Selenium does not necessarily trigger responsive behavior unless the website's CSS is designed to respond to changes in viewport size.

If you want to simulate specific devices with predefined sizes, you can use the mobile_emulation capability in Chrome. However, this is specific to Chrome and not available in Firefox.

from selenium import webdriver

chrome_options = webdriver.ChromeOptions()
chrome_options.add_experimental_option('mobileEmulation', {'deviceName': 'iPhone X'})

driver = webdriver.Chrome(chrome_options=chrome_options)
driver.get('https://example.com')

# Continue with your Selenium script...

driver.quit()

Keep in mind that responsive design testing is often more effectively done using tools built into browsers (e.g., Chrome DevTools) or specialized testing frameworks rather than relying solely on Selenium.

Using a proxy correctly involves understanding its purpose, choosing the right proxy server, configuring the proxy settings, and ensuring your security and privacy. Here's a step-by-step guide on how to use a proxy correctly:

1. Understand the purpose: Proxies are used to hide your IP address, bypass geographic restrictions, and access content that may be blocked in your region. They act as an intermediary between your device and the internet, forwarding requests and receiving responses on your behalf.

2. Choose a reliable proxy server: Select a proxy server that is fast, reliable, and secure. You can find proxy servers from various sources, including free proxy lists, paid proxy services, or proxy providers. Make sure to choose a proxy server that matches your needs, such as an HTTP, HTTPS, or SOCKS proxy, depending on your use case.

3. Check the proxy server's speed and performance: Before using a proxy server, test its speed and performance to ensure it meets your requirements. You can use online tools like Speedtest.net to test the proxy server's connection speed.

4. Configure the proxy settings: Once you have chosen a proxy server, configure the proxy settings on your device or application. This usually involves entering the proxy server's IP address, port number, and any required authentication details (username and password).

5. Test your connection: After configuring the proxy settings, test your connection to ensure that the proxy is working correctly and that you can access the content you want.

6. Monitor your proxy usage: Regularly monitor your proxy usage to ensure it is working as expected. Keep an eye on your connection speed, and be aware of any changes in your proxy server's performance or availability.

7. Secure your connection: When using a proxy, always use a secure connection (HTTPS) to protect your data from being intercepted or tampered with. Some proxy servers may offer encryption, but it's always better to use HTTPS when possible.

8. Respect the proxy server's terms of service: Be aware of and adhere to the terms of service of the proxy server you are using. Some proxy servers may have usage limits, restrictions on certain types of content, or rules against illegal activities.

9. Be cautious with free proxies: While free proxies can be useful, they may be slower, less reliable, and less secure than paid proxies. Be cautious when using free proxies, and consider using a paid proxy service if you require a higher level of security and performance.

10. Protect your privacy: When using a proxy, be mindful of your online activities and protect your privacy. Avoid accessing sensitive information or performing activities that could compromise your security while connected to a proxy.

Several virtual proxy servers can be created within one device. These are special dedicated servers that only "service" such traffic. Many devices can connect to them at the same time.