LANgchain Proxy

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 send data to an input field using Selenium, you can use the send_keys() method provided by the WebElement class. Here's an example:

from selenium import webdriver

# Create a new instance of the Firefox driver
driver = webdriver.Firefox()

# Navigate to a webpage
driver.get("https://example.com")

# Find the input field by its HTML attribute (e.g., name, id, class, etc.)
input_field = driver.find_element_by_name("example_input")

# Send data to the input field using send_keys()
input_field.send_keys("Hello, this is some text.")

# Close the browser window
driver.quit()

In this example, replace "example_input" with the actual attribute value (name, id, class, etc.) that uniquely identifies the input field on the webpage you are working with. You can inspect the HTML code of the webpage to identify the appropriate attribute to use.

If the input field does not have a unique identifier, you may need to use other locators or XPath to locate the element. Here's an example using XPath:

from selenium import webdriver

# Create a new instance of the Firefox driver
driver = webdriver.Firefox()

# Navigate to a webpage
driver.get("https://example.com")

# Find the input field by XPath
input_field = driver.find_element_by_xpath("//input[@name='example_input']")

# Send data to the input field using send_keys()
input_field.send_keys("Hello, this is some text.")

# Close the browser window
driver.quit()

To check a proxy for blacklisting, it is necessary to use special tools developed for this purpose. Many proxy-checkers provide free online IP-address verification and provide detailed information related to the proxy servers security. To get it, just enter the IP address of the proxy and click on the "Verify" button.

In e-mail, proxy servers are used for secure data exchange as well as for collecting e-mails from several e-mail addresses at once. For example, this is how Gmail works, which also allows you to receive e-mails from mail.ru and other e-mail services.

Under such parsing we mean the collection of keywords from services such as Yandex Wordstat. These data will later be required for SEO-promotion of the site. The resulting word combinations are then integrated into the content of the resource, which improves its position in SERPs on a particular topic.