更改Azure存储Blob中文件的内容类型

Question

我只使用Microsoft Azure存储，不使用其他Azure产品/服务。我通过ftp类型客户端(GoodSync)将文件上传到我的存储Blob，在文件已经在blob中之后，我需要根据文件扩展名更改所有文件的内容类型。我已经环顾了四周，没有他们的PowerShell VPS，我还没有发现如何做到这一点。我的选择是什么?我如何实现这一点？我真的需要在这里一步一步来。

Answer 1

这是最新Azure.Storage.Blobs软件开发工具包的更新版本。我正在使用.Net 5和控制台应用程序。

using Azure.Storage.Blobs.Models;
using System;
using System.Collections.Generic;
using System.IO;

var contentTypes = new Dictionary<string, string>()
{
    {".woff", "font/woff"},
    {".woff2", "font/woff2" }
};

var cloudBlobClient = new BlobServiceClient("connectionstring");
var cloudBlobContainerClient = cloudBlobClient.GetBlobContainerClient("fonts");
await cloudBlobContainerClient.CreateIfNotExistsAsync();

var blobs = cloudBlobContainerClient.GetBlobsAsync();

await foreach (var blob in blobs)
{
    var extension = Path.GetExtension(blob.Name);

    contentTypes.TryGetValue(extension, out var contentType);
    if (string.IsNullOrEmpty(contentType)) continue;

    if (blob.Properties.ContentType == contentType)
    {
        continue;
    }

    try
    {
        // Get the existing properties
        var blobClient = cloudBlobContainerClient.GetBlobClient(blob.Name);
        var properties = await blobClient.GetPropertiesAsync();

        var headers = new BlobHttpHeaders { ContentType = contentType };

        // Set the blob's properties.
        await blobClient.SetHttpHeadersAsync(headers);
    }
    catch (RequestFailedException e)
    {
        Console.WriteLine($"HTTP error code {e.Status}: {e.ErrorCode}");
        Console.WriteLine(e.Message);
        Console.ReadLine();
    }
}