Can I set the access tier when I upload a blob? If yes, then how to do that? - azure

Question

I did not find any way to set the access tier of a blob when I upload it, I know I can set a blob's access tier after I uploaded it, but I just want to know if I can upload the blob and set it's access tier in only one step. And if there is any golang API to do that?
I googled it but I got nothing helpful till now.
Here is what I did now, I mean upload it and then set it's access tier.
// Here's how to upload a blob.
blobURL := containerURL.NewBlockBlobURL(fileName)
ctx := context.Background()
_, err = azblob.UploadBufferToBlockBlob(ctx, data, blobURL, azblob.UploadToBlockBlobOptions{})
handleErrors(err)
//set tier
_, err = blobURL.SetTier(ctx, azblob.AccessTierCool, azblob.LeaseAccessConditions{})
handleErrors(err)
But I want to upload a blob and set it's tier in one step, not two steps as I do now.

Answer 1

The short answer is No. According to the offical REST API reference, the blob operation you want is that to do via two REST APIs Put Blob and Set Blob Tier. Actually, all SDK APIs for different languages are implemented by wrapping the related REST APIs.
Except for Page Blob, you can set the header x-ms-access-tier in your operation request to do your want, as below.
For Block Blob, the operations in two steps are necessary, and can not be merged.

Answer 2

It is now possible using the new x-ms-access-tier header:
x-ms-access-tier
REST API with auth
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Net.Mime;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
namespace WhateverYourNameSpaceIs
{
class Program
{
private const string StorageKey = #"PutYourStorageKeyHere";
private const string StorageAccount = "PutYourStorageAccountHere";
private const string ContainerName = "PutYourContainerNameHere";
private const string Method = "PUT";
private const string ContentType = MediaTypeNames.Image.Jpeg;
private static readonly string BlobStorageTier = StorageTier.Cool;
private static readonly List<Tuple<string, string>> HttpContentHeaders = new List<Tuple<string, string>>()
{
new Tuple<string, string>("x-ms-access-tier", BlobStorageTier),
new Tuple<string, string>("x-ms-blob-type", "BlockBlob"),
new Tuple<string, string>("x-ms-date", DateTime.UtcNow.ToString("R")),
new Tuple<string, string>("x-ms-version", "2018-11-09"),
new Tuple<string, string>("Content-Type", ContentType),
};
static async Task Main()
{
await UploadBlobToAzure("DestinationFileNameWithoutPath", "LocalFileNameWithPath");
}
static async Task<int> UploadBlobToAzure(string blobName, string fileName)
{
int returnValue = (int)AzureCopyStatus.Unknown;
try
{
using var client = new HttpClient();
using var content = new ByteArrayContent(File.ReadAllBytes(fileName));
HttpContentHeaders.ForEach(x => content.Headers.Add(x.Item1, x.Item2));
var stringToSign = $"{Method}\n\n\n{content.Headers.ContentLength.Value}\n\n{ContentType}\n\n\n\n\n\n\n";
foreach (var httpContentHeader in HttpContentHeaders.Where(x => x.Item1 != "Content-Type").OrderBy(x => x.Item1))
stringToSign += $"{httpContentHeader.Item1.ToLower()}:{httpContentHeader.Item2}\n";
stringToSign += $"/{StorageAccount}/{ContainerName}/{blobName}";
HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String(StorageKey));
string signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("SharedKey", $"{StorageAccount}:{signature}");
var httpResponse = await client.PutAsync($"https://{StorageAccount}.blob.core.windows.net/{ContainerName}/{blobName}", content);
returnValue = (int)httpResponse.StatusCode;
}
catch (IOException ioException)
{
Console.WriteLine(ioException.ToString());
returnValue = (int)AzureCopyStatus.FileNotFound;
}
catch (Exception exception)
{
Console.WriteLine(exception.ToString());
returnValue = (int)AzureCopyStatus.Error;
}
return returnValue;
}
internal enum AzureCopyStatus
{
Unknown = -1,
Error = 0,
FileNotFound = 2
}
internal static class StorageTier
{
internal static string Cool = "Cool";
internal static string Hot = "Hot";
}
}
}