upload-multi-part-progress.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;

namespace Misc
{
    class Program
    {
        static string baseUrl = "http://localhost:39720";

        static async Task Main(string[] args)
        {
            var _multipartHttpClient = new HttpClient { BaseAddress = new Uri(baseUrl), Timeout = new TimeSpan(0, 20, 0) };

            var multipartContent = new MultipartFormDataContent("NKdKd9Yk");
            multipartContent.Headers.ContentType.MediaType = "multipart/form-data";

            var videoContent = new StreamContent(new FileStream(@"C:\repo\test-files\test.mp4", FileMode.Open), 100000);
            multipartContent.Add(videoContent, "video", "file.mp4");

            var thumbnailContent = new StreamContent(new FileStream(@"C:\repo\test-files\test.png", FileMode.Open), 100000);
            multipartContent.Add(thumbnailContent, "thumbnail", "file.png");

            var progressContent = new ProgressableStreamContent(multipartContent, 100000, (done, total) =>
            {
                Console.WriteLine($"Done {done}/{total}");
            });

            _multipartHttpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("multipart/form-data"));
            _multipartHttpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", await GetToken());
            var response = await _multipartHttpClient.PutAsync($"{baseUrl}/api/files/upload", progressContent);
            response.EnsureSuccessStatusCode();
        }
        
        ...
    }
}