Question

上传Blob时，我没有找到任何方法来设置Blob的访问层，我知道上传后可以设置Blob的访问层，但是我只是想知道是否可以上传Blob并进行设置仅一步之遥就是访问层。如果有任何golang API可以做到这一点？

我用谷歌搜索，但到现在我都没有帮助。

这是我现在要做的，我的意思是上传它，然后设置它的访问层。

// 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)

但是我想上传一个Blob，并一步一步设置它的层级，而不是像现在这样两步。

Answer 1

简短的回答是“否”。根据官方REST API参考，您想要的blob操作是通过两个REST API Put Blob和Set Blob Tier完成的。实际上，所有用于不同语言的SDK API都是通过包装相关的REST API来实现的。

除了Page Blob之外，您可以在操作请求中设置标题x-ms-access-tier以执行所需操作，如下所示。

对于Block Blob，分两个步骤进行操作是必要的，并且不能合并。

Answer 2

现在可以使用新的x-ms-access-tier标头：

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";
        }
    }
}

上传Blob时可以设置访问层吗？如果是，那该怎么做？

2 个答案: