How to Use RestSharp (C# Library) for Web Scraping

using System;
using System.Threading.Tasks;
using HtmlAgilityPack;
using RestSharp;

class Program
{
    static async Task Main(string[] args)
    {
        string url = "http://quotes.toscrape.com/";

        // Initialize RestSharp client
        var client = new RestClient(url);

        // Create a GET request
        var request = new RestRequest(Method.GET);

        // Execute the request
        var response = await client.ExecuteAsync(request);

        if (response.IsSuccessful)
        {
            // Parse the page content using HtmlAgilityPack
            HtmlDocument htmlDoc = new HtmlDocument();
            htmlDoc.LoadHtml(response.Content);

            // Find all the quotes on the page
            var quotes = htmlDoc.DocumentNode.SelectNodes("//span[@class='text']");

            // Print each quote
            foreach (var quote in quotes)
            {
                Console.WriteLine(quote.InnerText);
            }
        }
        else
        {
            Console.WriteLine($"Failed to retrieve the page. Status Code: {response.StatusCode}");
        }
    }
}

using System;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using RestSharp;

class Program
{
    private static readonly string apiUrl = "https://api.capsolver.com";
    private static readonly string clientKey = "YOUR_API_KEY"; // Replace with your Capsolver API Key

    static async Task Main(string[] args)
    {
        try
        {
            // Step 1: Create a task for solving reCAPTCHA v2
            string taskId = await CreateTask();
            Console.WriteLine("Task ID: " + taskId);

            // Step 2: Retrieve the result of the task
            string taskResult = await GetTaskResult(taskId);
            Console.WriteLine("Task Result (CAPTCHA Token): " + taskResult);
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }

    // Method to create a new CAPTCHA-solving task
    private static async Task<string> CreateTask()
    {
        // Initialize RestSharp client
        var client = new RestClient(apiUrl);

        // Request payload
        var requestBody = new
        {
            clientKey = clientKey,
            task = new
            {
                type = "ReCaptchaV2TaskProxyLess", // Task type for reCAPTCHA v2 without proxy
                websiteURL = "https://www.example.com", // The website URL to solve CAPTCHA for
                websiteKey = "SITE_KEY_HERE" // reCAPTCHA site key
            }
        };

        // Create a POST request
        var request = new RestRequest("createTask", Method.POST);
        request.AddJsonBody(requestBody);

        // Execute the request
        var response = await client.ExecuteAsync(request);

        if (!response.IsSuccessful)
        {
            throw new Exception("Failed to create task: " + response.Content);
        }

        JObject jsonResponse = JObject.Parse(response.Content);
        if (jsonResponse["errorId"].ToString() != "0")
        {
            throw new Exception("Error creating task: " + jsonResponse["errorDescription"]);
        }

        // Return the task ID to be used in the next step
        return jsonResponse["taskId"].ToString();
    }

    // Method to retrieve the result of a CAPTCHA-solving task
    private static async Task<string> GetTaskResult(string taskId)
    {
        // Initialize RestSharp client
        var client = new RestClient(apiUrl);

        // Request payload
        var requestBody = new
        {
            clientKey = clientKey,
            taskId = taskId
        };

        // Create a POST request
        var request = new RestRequest("getTaskResult", Method.POST);
        request.AddJsonBody(requestBody);

        // Poll for the result of the task every 5 seconds
        while (true)
        {
            var response = await client.ExecuteAsync(request);

            if (!response.IsSuccessful)
            {
                throw new Exception("Failed to get task result: " + response.Content);
            }

            JObject jsonResponse = JObject.Parse(response.Content);
            if (jsonResponse["errorId"].ToString() != "0")
            {
                throw new Exception("Error getting task result: " + jsonResponse["errorDescription"]);
            }

            // If the task is ready, return the CAPTCHA token
            if (jsonResponse["status"].ToString() == "ready")
            {
                return jsonResponse["solution"]["gRecaptchaResponse"].ToString();
            }

            // Wait for 5 seconds before checking again
            Console.WriteLine("Task is still processing, waiting 5 seconds...");
            await Task.Delay(5000);
        }
    }
}

using System;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using RestSharp;

class Program
{
    private static readonly string apiUrl = "https://api.capsolver.com";
    private static readonly string clientKey = "YOUR_API_KEY"; // Replace with your Capsolver API Key

    static async Task Main(string[] args)
    {
        try
        {
            // Step 1: Create a task for solving reCAPTCHA v3
            string taskId = await CreateTask();
            Console.WriteLine("Task ID: " + taskId);

            // Step 2: Retrieve the result of the task
            string taskResult = await GetTaskResult(taskId);
            Console.WriteLine("Task Result (CAPTCHA Token): " + taskResult);
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }

    // Method to create a new CAPTCHA-solving task
    private static async Task<string> CreateTask()
    {
        // Initialize RestSharp client
        var client = new RestClient(apiUrl);

        // Request payload
        var requestBody = new
        {
            clientKey = clientKey,
            task = new
            {
                type = "ReCaptchaV3TaskProxyLess", // Task type for reCAPTCHA v3 without proxy
                websiteURL = "https://www.example.com", // The website URL to solve CAPTCHA for
                websiteKey = "SITE_KEY_HERE", // reCAPTCHA site key
                minScore = 0.3, // Desired minimum score
                pageAction = "your_action" // Action name defined on the site
            }
        };

        // Create a POST request
        var request = new RestRequest("createTask", Method.POST);
        request.AddJsonBody(requestBody);

        // Execute the request
        var response = await client.ExecuteAsync(request);

        if (!response.IsSuccessful)
        {
            throw new Exception("Failed to create task: " + response.Content);
        }

        JObject jsonResponse = JObject.Parse(response.Content);
        if (jsonResponse["errorId"].ToString() != "0")
        {
            throw new Exception("Error creating task: " + jsonResponse["errorDescription"]);
        }

        // Return the task ID to be used in the next step
        return jsonResponse["taskId"].ToString();
    }

    // Method to retrieve the result of a CAPTCHA-solving task
    private static async Task<string> GetTaskResult(string taskId)
    {
        // Initialize RestSharp client
        var client = new RestClient(apiUrl);

        // Request payload
        var requestBody = new
        {
            clientKey = clientKey,
            taskId = taskId
        };

        // Create a POST request
        var request = new RestRequest("getTaskResult", Method.POST);
        request.AddJsonBody(requestBody);

        // Poll for the result of the task every 5 seconds
        while (true)
        {
            var response = await client.ExecuteAsync(request);

            if (!response.IsSuccessful)
            {
                throw new Exception("Failed to get task result: " + response.Content);
            }

            JObject jsonResponse = JObject.Parse(response.Content);
            if (jsonResponse["errorId"].ToString() != "0")
            {
                throw new Exception("Error getting task result: " + jsonResponse["errorDescription"]);
            }

            // If the task is ready, return the CAPTCHA token
            if (jsonResponse["status"].ToString() == "ready")
            {
                return jsonResponse["solution"]["gRecaptchaResponse"].ToString();
            }

            // Wait for 5 seconds before checking again
            Console.WriteLine("Task is still processing, waiting 5 seconds...");
            await Task.Delay(5000);
        }
    }
}