HttpOperations.cs

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*/

using System;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

namespace UriHtpStatus
{
    public static class HttpOperations
    {
        /// <summary>
        /// Returns the status code of a HEAD request.
        /// </summary>
        /// <param name="uri">URI required to check the HTTP status code for.</param>
        /// <returns>HttpStatusCode</returns>
        public static HttpStatusCode GetHttpResponseCode(string uri)
        {
            try
            {
                // Convert URI string to URI object to analyze it.
                Uri requestUri = new Uri(uri);
                
                // Validate if the URI is good or bad before sending the GET request.
                if (!requestUri.IsAbsoluteUri)
                {
                    Console.WriteLine("Bad Request URI! You need to have an absolute URI.");
                    return HttpStatusCode.BadRequest;
                }

                using (HttpClient httpClient = new HttpClient())
                {
                    using (HttpRequestMessage requestMessage = new HttpRequestMessage())
                    {
                        requestMessage.RequestUri = requestUri; // Set Request URI
                        requestMessage.Method = HttpMethod.Head; // Set HTTP Method to HEAD

                        // Send HTTP GET request to URI 
                        Task<HttpResponseMessage> sendMessageTask = httpClient.SendAsync(requestMessage);
                        sendMessageTask.Wait(); // Wait for response to return back

                        // Parse the response object
                        using (HttpResponseMessage httpResponse = sendMessageTask.Result)
                        {
                            return httpResponse.StatusCode; // Return HTTP Response Code
                        }
                    }
                }

            }
            catch (Exception ex)
            {
                // Something went wrong!
                Console.WriteLine($"Error: {ex.Message}");
                return HttpStatusCode.BadRequest;
            }
            
        }
                       

    }
}