Level 1 Proxies

Most often it is used on the iPhone just to bypass the blocking of access to certain resources. But also VPN is one of the most effective methods of protecting your confidential information. After all, with VPN all traffic is additionally encrypted, the provider can't read it even if it's intercepted.

It seems there might be a confusion in your request. Polly is a resilience and transient-fault-handling library in C# for dealing with issues like network failures, timeouts, and other transient errors. It is not directly related to parsing courses or web scraping.

If you are looking to parse a course from a website using C#, you might want to use a combination of HTTP requests and HTML parsing libraries. Here's a basic example using the HtmlAgilityPack library for HTML parsing and HttpClient for making HTTP requests

Install HtmlAgilityPack:

You can install the HtmlAgilityPack library using NuGet Package Manager Console:

Install-Package HtmlAgilityPack

Example Code

Here's a simple example of how you might use HttpClient and HtmlAgilityPack to parse course information from a website:

using System;
using System.Net.Http;
using HtmlAgilityPack;

class Program
{
    static async System.Threading.Tasks.Task Main(string[] args)
    {
        // URL of the course page
        string courseUrl = "https://example.com/courses";

        // Make an HTTP request to get the HTML content
        using (HttpClient client = new HttpClient())
        {
            string htmlContent = await client.GetStringAsync(courseUrl);

            // Use HtmlAgilityPack to parse the HTML
            HtmlDocument doc = new HtmlDocument();
            doc.LoadHtml(htmlContent);

            // Extract course information (modify as per the HTML structure)
            HtmlNodeCollection courseNodes = doc.DocumentNode.SelectNodes("//div[@class='course']");
            if (courseNodes != null)
            {
                foreach (HtmlNode courseNode in courseNodes)
                {
                    string courseTitle = courseNode.SelectSingleNode(".//h2")?.InnerText.Trim();
                    string courseDescription = courseNode.SelectSingleNode(".//p")?.InnerText.Trim();

                    Console.WriteLine($"Title: {courseTitle}");
                    Console.WriteLine($"Description: {courseDescription}");
                    Console.WriteLine();
                }
            }
            else
            {
                Console.WriteLine("No course information found on the page.");
            }
        }
    }
}

This is a basic example, and you'll need to adapt it based on the actual HTML structure of the course page you are working with.

To emulate mouse wheel scrolling and keystrokes in Selenium WebDriver with Node.js, you can use the Actions class to perform these actions. Here's an example that demonstrates scrolling and sending keystrokes:

const { Builder, By, Key } = require('selenium-webdriver');

(async function example() {
  // Create a new instance of the WebDriver
  const driver = await new Builder().forBrowser('chrome').build();

  try {
    // Navigate to a webpage
    await driver.get('https://example.com');

    // Perform mouse wheel scrolling
    await driver.actions().move({ x: 0, y: 0 }).sendKeys(Key.PAGE_DOWN).perform();
    await driver.sleep(1000); // Sleep for 1 second to see the effect

    // Perform keystrokes in an input field
    const inputField = await driver.findElement(By.css('input[type="text"]'));
    await inputField.sendKeys('Hello, this is some text.');
    await driver.sleep(1000); // Sleep for 1 second to see the effect

  } finally {
    // Close the browser window
    await driver.quit();
  }
})();

- driver.actions() creates an instance of the Actions class.
- move({ x: 0, y: 0 }) is used to position the mouse at coordinates (0, 0).
- sendKeys(Key.PAGE_DOWN) performs a mouse wheel scrolling action. You can replace Key.PAGE_DOWN with other keys or combinations according to your needs.
- sendKeys() is also used to input text into an input field. The inputField variable is a reference to the input field on the webpage, and sendKeys() is called to type text into it.

Make sure to replace the URL in driver.get('https://example.com') with the URL of the webpage you are working on, and adjust the CSS selector for the input field according to your webpage's structure.

Additionally, you may need to install the selenium-webdriver package if you haven't already:

npm install selenium-webdriver

It means a private proxy server used by several users. For example, one of them has bought a paid proxy and lets his friend use it for a fee. That is, he "shared" his proxy (shared means "common").

To assign a proxy server to an Android or iOS access point, follow these steps:

Open the "Settings" section. Go to the "Wi-Fi" tab. Select your access point. Click on "Proxy". Use manual setup and specify the data of proxy. Save the settings.