GPS Proxy

Both versions of the protocol, at first glance, are able to provide anonymity on the Internet, as well as bypass all kinds of blockages. In addition, they are not only suitable for online entertainment, but also for work (study). This is what unites them to some extent, but there are still more differences. These are primarily the number of IP addresses, the cost of rent, appearance, connection speed, ping, and security. The IPv4 protocol, developed in the 1980s, is a more outdated model with a number of significant problems, including inefficient routing.

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.

When scraping paginated content, fetching the "next page" usually involves extracting the URL of the next page from the HTML of the current page. In PHP, you can use a library like Simple HTML DOM Parser to parse HTML and extract the URL for the next page.

Here's an example of how you might scrape the next page URL using PHP

Install Simple HTML DOM Parser:

You can download it from sourceforge and include it in your project, or use Composer:

composer require sunra/php-simple-html-dom-parser

Write a PHP script to scrape the next page URL:

find('a.next-page-link', 0);

    if ($nextPageLink) {
        // Extract the href attribute (URL) from the link
        $nextPageUrl = $nextPageLink->href;
        return $nextPageUrl;
    } else {
        return null; // No next page link found
    }
}

// Example usage
$currentUrl = 'https://example.com/page1'; // Replace with the URL of the current page
$nextPageUrl = scrapeNextPageUrl($currentUrl);

if ($nextPageUrl) {
    echo "Next Page URL: $nextPageUrl";
} else {
    echo "No Next Page URL found.";
}

Replace the $currentUrl variable with the URL of the current page.

Adjust the HTML element selector ('a.next-page-link') based on the structure of the website you are scraping.

Run the script:

Execute the PHP script to see the URL of the next page.

In the context of a proxy server, the term "host" refers to the IP address or domain name of the proxy server itself. The host is the destination where your internet traffic is routed through when you use a proxy server. When you configure your web browser or software to use a proxy, you're specifying the host (proxy server address) and the port number to connect to the proxy server.

The proxy server then forwards your web requests to the actual destination (e.g., a website) and returns the response back to you. This process allows the proxy server to act as an intermediary between you and the internet, potentially providing benefits such as anonymity, access to restricted content, or improved performance.

To add a site to proxy exceptions, you need to configure your proxy settings to bypass the proxy for specific domains or websites. The process may vary depending on the browser or operating system you are using. Here, I will provide instructions for popular web browsers:

Google Chrome:
- Open Google Chrome.
- Click on the three dots (⠇) in the top right corner of the Chrome window.
- Select "Settings" from the dropdown menu.
- Scroll down and click on "Advanced" at the bottom of the page.
- Under the "System" section, click on "Open proxy settings."
- In the Windows Settings window, go to the "Exceptions" tab.
- Click on the "Add" button.
- Enter the domain or IP address of the site you want to add to the exceptions list in the "Address" field.
- Click "OK" to save the exception.

Mozilla Firefox:
- Open Mozilla Firefox.
- Click on the three lines (⠇) in the top right corner of the Firefox window.
- Select "Options" or "Preferences" from the dropdown menu.
- Go to the "General" tab, and click on "Settings..." in the "Network Proxy" section.
- In the Connection Settings window, click on "Settings..." under the "Dial-up networking" section.
- In the Internet Properties window, go to the "Security" tab.
- Click on "Restricted Sites" and then "Sites."
- Click on "Add" and enter the domain or IP address of the site you want to add to the exceptions list.
- Click "Close" and then "OK" to save the exception.