using Microsoft.WindowsAzure.Storage;

using Microsoft.WindowsAzure.Storage.Blob;

using System;

using System.Collections.Generic;

using System.IO;

using System.Net.Http;

using System.Threading.Tasks;

​

namespace TestAppForUploadingBlobFile

{

    class Program

    {

​

        static async Task Main(string[] args)

        {

            string storageConnectionString = "your conn string";

            string containerName = "containername";

            string pdfUrl = "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf";

            // Generate a unique name for the blob using a GUID

            string blobName = Guid.NewGuid().ToString() + ".pdf";          

​

​

            using (HttpClient httpClient = new HttpClient())

            {

                // Send a GET request to the URL

                using (HttpResponseMessage response = await httpClient.GetAsync(pdfUrl))

                {

                    response.EnsureSuccessStatusCode(); // Ensure we received a successful response

​

                    // Get the stream of the content

                    using (Stream contentStream = await response.Content.ReadAsStreamAsync())

                    {

                        // Call the upload method

                        await UploadBlobWithMetadataAsync(storageConnectionString, containerName, blobName, contentStream);

                    }

                }

            }

​

            Console.WriteLine("Upload completed. "+ blobName);

​

​

        }

        public static async Task UploadBlobWithMetadataAsync(string storageConnectionString, string containerName, string blobName, Stream stream)

        {

            try

            {

                // Parse the connection string and return a reference to the storage account.

                CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageConnectionString);

​

                // Create the blob client.

                CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

​

                // Retrieve a reference to a container.

                CloudBlobContainer container = blobClient.GetContainerReference(containerName);

​

​

                CloudBlockBlob blockBlob = container.GetBlockBlobReference(blobName);

​

​

                //if we set empty string it fails

​

                //blockBlob.Properties.ContentEncoding = "";

                //blockBlob.Properties.ContentEncoding = string.Empty;

​

                //if we set null its ok 

                blockBlob.Properties.ContentEncoding = null;     

                await blockBlob.UploadFromStreamAsync(stream);

​

                //if file is uploaded first and then properties are set it works ok

                //await blockBlob.UploadFromStreamAsync(stream);

                //blockBlob.Properties.ContentEncoding = "";

                //await blockBlob.SetPropertiesAsync();

​

​

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex);

                throw;

            }

        }

    }

}

​