The basic configuration is written in nginx.conf file in the program directory. You need to create a server article and specify there the port number and the place for cached data. Thus, for example, by using port 8080 you may organize a local proxy to test your own sites.

To find an element by its HTML code in Selenium, you can use the ExecuteScript method to execute JavaScript code that returns the element corresponding to the provided HTML code. Here's an example of how to do this using C#:

Install the required NuGet packages:

Install-Package OpenQA.Selenium.Chrome.WebDriver -Version 3.141.0
Install-Package OpenQA.Selenium.Support.UI -Version 3.141.0

Create a method to find an element by its HTML code:

using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;
using System;
using System.Text.RegularExpressions;

public static IWebElement FindElementByHtml(this IWebDriver driver, string htmlCode)
{
    // Execute JavaScript to create a new element with the provided HTML code
    var script = $@"var div = document.createElement('div'); div.innerHTML = arguments[0]; document.body.appendChild(div); return div.children[0];";
    var element = (IWebElement)driver.ExecuteScript(script, htmlCode);

    // Remove the created element from the DOM
    driver.ExecuteScript("document.body.removeChild(document.body.children[document.body.children.length - 1]);");

    return element;
}

Use the FindElementByHtml method in your test code:

using OpenQA.Selenium;
using System;

namespace SeleniumFindElementByHtmlExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Set up the WebDriver
            IWebDriver driver = new ChromeDriver();
            driver.Manage().Window.Maximize();

            // Navigate to the target web page
            driver.Navigate().GoToUrl("https://www.example.com");

            // Find an element by its HTML code
            IWebElement element = driver.FindElementByHtml(@"
                

                    
Example Heading
                    
Example paragraph text.
                
");

            // Perform any additional actions as needed

            // Close the browser
            driver.Quit();
        }
    }
}

In this example, we first create a method called FindElementByHtml that takes an IWebDriver instance and a string containing the HTML code as input. Inside the method, we use the ExecuteScript method to execute JavaScript code that creates a new element with the provided HTML code, appends it to the document body, and returns the created element.

We then remove the created element from the DOM using another ExecuteScript call. The method returns the created element as an IWebElement.

In the test code, we set up the WebDriver, navigate to the target web page, and use the FindElementByHtml method to find an element by its HTML code. After finding the element, you can perform any additional actions as needed.

Remember to replace the HTML code in the FindElementByHtml method call with the actual HTML code you want to use.

Sending large files over UDP can be a bit tricky because UDP does not guarantee delivery, order, or even that packets won't be duplicated. However, it is possible to send large files using UDP by breaking the file into smaller chunks and sending each chunk separately. Here's a step-by-step guide on how to do it in Python:

1. Import necessary libraries:

import os
import socket
import pickle

2. Define a function to serialize the file data:

def serialize_file_data(file_data):
    return pickle.dumps(file_data)

3. Create a UDP socket:

def create_udp_socket(host, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind((host, port))
    return sock

4. Send the file data over UDP:

def send_file(sock, file_data, host, port):
    serialized_file_data = serialize_file_data(file_data)
    sock.sendto(serialized_file_data, (host, port))

5. Define a function to deserialize the file data:

def deserialize_file_data(file_data):
    return pickle.loads(file_data)

6. Create a function to receive the file data:

def receive_file(sock, host, port):
    while True:
        data, addr = sock.recvfrom(4096)
        file_data = deserialize_file_data(data)
        yield file_data

7. Putting it all together:

if __name__ == "__main__":
    file_path = "large_file.txt"
    host, port = "127.0.0.1", 12345
    sock = create_udp_socket(host, port)
    send_file(sock, file_path, host, port)

On the receiving side, you will need to collect all the received file data and save it to a file.

There are three types of proxies that work using three types of protocols. The weakest one is HTTP. It is long outdated and unsuitable for visiting web resources. HTTPS works through a secure protocol and is most often used for web surfing. SOCKS5 proxies are capable of working with the largest number of programs and protocols. They are also beneficial because they keep your IP address anonymous in the request header.

Such proxy redirects requests from clients to different servers (globally or within a single local network). It can be used for load balancing in different Internet services, for testing web applications, for secured access to local network servers (all "non-client" traffic is ignored).