Proxy for Blackboard

There are several options for its use: bypassing the blocking of websites, shopping in foreign online stores at regional (local) prices, access to a full library of media content, hiding your real IP-address.

To enable proxies in your MacBook, you need to go to "System Preferences" (from the "Apple" menu), then open "Network", then - specify the type of connection you are using. Then select "Advanced Settings" (can be named as "Advanced"), then click on "Proxy". And then - either set the parameters manually, or specify a configuration file.

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.

Setting up a proxy server correctly involves choosing the right hardware, selecting a suitable proxy server software, configuring the server, and securing the connection. Here's a step-by-step guide to help you set up a proxy server:

1. Choose the right hardware: Select a server or computer with adequate resources (CPU, RAM, and storage) to handle the expected number of connections and data transfer rates. You may also want to consider using dedicated hardware or a virtual private server (VPS) for better performance and security.

2. Select proxy server software: There are various proxy server software options available, such as Privoxy, Squid, and PacketFence. Choose a software that suits your needs, considering factors like ease of use, performance, and compatibility with your operating system.

3. Install the proxy server software: Follow the instructions provided by the software vendor to install the proxy server software on your chosen hardware. Make sure to download the software from a reputable source and use the latest version to ensure security and compatibility.

4. Configure the server: Configure the proxy server software according to your requirements. This may include setting up the IP address, port number, and authentication methods (e.g., username and password, IP filtering, or HTTP authentication). You can also configure additional settings, such as caching, bandwidth limits, and access control lists.

5. Secure the connection: Ensure that your proxy server is secure by using encryption (e.g., SSL/TLS) and implementing firewalls or intrusion detection systems. Regularly update the software and apply security patches to minimize vulnerabilities.

6. Test the proxy server: Once the server is set up and configured, test its functionality and performance. Verify that it can handle incoming connections, forward requests correctly, and maintain the desired level of anonymity or security.

7. Share the proxy server: If you want to share your proxy server with others, provide them with the IP address, port number, and any necessary authentication credentials. Be cautious when sharing your proxy server, as it can expose your IP address and bandwidth to others, potentially leading to security risks or abuse.

To connect to the Internet via a proxy server, you need to configure your browser or operating system to use the proxy server. Here's a general guide for setting up a proxy server using a web browser:

1. Open your web browser.

2. Access the browser settings or preferences:
- On Windows: Click the three-dot menu in the top-right corner and select "Settings."
- On macOS: Click the Apple menu in the top-left corner, select "System Preferences," and click "Network."
- On Linux: Click the menu button in the top-right corner, select "Settings," and click "Network."
- On Android: Open the "Settings" app and tap "Network & internet."
- On iOS: Open the "Settings" app and tap "Wi-Fi."

3. Locate the proxy settings:
- On Windows: Under "Network," click "Proxy settings."
- On macOS: Click the "Advanced" button and go to the "Proxies" tab.
- On Linux: Click the "+" button to add a new proxy.
- On Android: Tap "Private DNS" and "Static IP address" under "Advanced options."
- On iOS: Tap "Configure Proxy" under the active Wi-Fi network.

4. Enter the proxy server address, port, and authentication details (if required):
- Proxy server address: Enter the domain name or IP address of the proxy server (e.g., http://proxy-server).
- Port: Enter the port number used by the proxy server (e.g., 8080).
- Username and Password (optional): If the proxy server requires authentication, enter the username and password provided by the proxy server provider.

5. Save the proxy settings and restart the browser.