[英]Change Content Type for files in Azure Storage Blob
I use only Microsoft Azure Storage and no other Azure products/services.我只使用 Microsoft Azure 存储,不使用其他 Azure 产品/服务。 I upload files to my storage blob via ftp type client (GoodSync), and I need to change the content type of all the files based on their file extension after they are already in the Blob.
我通过 ftp 类型客户端 (GoodSync) 将文件上传到我的存储 Blob,并且我需要在所有文件已经在 Blob 中之后根据它们的文件扩展名更改它们的内容类型。 I have looked around and have not found out how to do this without having one of their VPS with PowerShell.
我环顾四周,没有找到如何在没有使用 PowerShell 的 VPS 的情况下执行此操作。 What are my options and how do I accomplish this?
我有哪些选择以及如何实现? I really need step by step here.
我真的需要一步一步来这里。
I recently had the same issue so I created a simple utility class in order to "fix" content type based on file's extension.我最近遇到了同样的问题,所以我创建了一个简单的实用程序类,以便根据文件的扩展名“修复”内容类型。 You can read details here
您可以在此处阅读详细信息
What you need to do is parse each file in your Azure Storage Containers and update ContentType based on a dictionary that defines which MIME type is appropriate for each file extension.您需要做的是解析 Azure 存储容器中的每个文件,并根据定义适合每个文件扩展名的 MIME 类型的字典更新 ContentType。
// Connect to your storage account
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageConnectionString);
// Load Container with the specified name
private CloudBlobContainer GetCloudBlobContainer(string name)
{
CloudBlobClient cloudBlobClient = _storageAccount.CreateCloudBlobClient();
return cloudBlobClient.GetContainerReference(name.ToLowerInvariant());
}
// Parse all files in your container and apply proper ContentType
private void ResetContainer(CloudBlobContainer container)
{
if (!container.Exists()) return;
Trace.WriteLine($"Ready to parse {container.Name} container");
Trace.WriteLine("------------------------------------------------");
var blobs = container.ListBlobs().ToList();
var total = blobs.Count;
var counter = 1;
foreach (var blob in blobs)
{
if (blob is CloudBlobDirectory) continue;
var cloudBlob = (CloudBlob)blob;
var extension = Path.GetExtension(cloudBlob.Uri.AbsoluteUri);
string contentType;
_contentTypes.TryGetValue(extension, out contentType);
if (string.IsNullOrEmpty(contentType)) continue;
Trace.Write($"{counter++} of {total} : {cloudBlob.Name}");
if (cloudBlob.Properties.ContentType == contentType)
{
Trace.WriteLine($" ({cloudBlob.Properties.ContentType}) (skipped)");
continue;
}
cloudBlob.Properties.ContentType = contentType;
cloudBlob.SetProperties();
Trace.WriteLine($" ({cloudBlob.Properties.ContentType}) (reset)");
}
}
_contentTypes
is a dictionary that contains the appropriate MIME type for each file extension: _contentTypes
是一个字典,其中包含每个文件扩展名的适当 MIME 类型:
private readonly Dictionary _contentTypes = new Dictionary() { {".jpeg", "image/jpeg"}, {".jpg", "image/jpeg" } };
Full list of content types and source code can be found here .可以在此处找到内容类型和源代码的完整列表。
Here you are a refreshed version for latest Azure.Storage.Blobs SDK.这是最新 Azure.Storage.Blobs SDK 的更新版本。 I'm using .Net 5 and console app.
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();
}
}
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