[英]Azure BlobClient DeleteIfExistsAsync error: 404 The specified blob does not exist
[英]Getting error "404 The specified blob does not exist" when downlading blob using Uri
我正在嘗試使用服務總線主題觸發器 Azure function 中的 blob url 下載 blob,但出現以下錯誤:
Status: 404 (The specified blob does not exist.)
ErrorCode: BlobNotFound
Content:
<?xml version="1.0" encoding="utf-8"?><Error><Code>BlobNotFound</Code><Message>The specified blob does not exist.
</Message></Error>
下面是我的 Startup.cs 文件:
[assembly: FunctionsStartup(typeof(Startup))]
namespace Emails.Dispatcher
{
public class Startup : FunctionsStartup
{
public override void Configure(IFunctionsHostBuilder builder)
{
builder.Services.AddSingleton(x =>
new BlobServiceClient(connectionString: Environment.GetEnvironmentVariable("AzureWebJobsStorage")));
builder.Services.AddSingleton<IBlobService, BlobService>();
builder.Services.AddLogging();
builder.Services.AddHttpClient();
builder.AddHelpers();
builder.Services.AddWorkers();
}
}
}
Blob 服務:
public class BlobService : IBlobService
{
private readonly BlobServiceClient _blobServiceClient;
public BlobService(BlobServiceClient blobServiceClient)
{
this._blobServiceClient = blobServiceClient;
}
public async Task<byte[]> DownloadAsync(string containerName, string fileUri)
{
var containerClient = _blobServiceClient.GetBlobContainerClient(containerName);
var blobClient = containerClient.GetBlobClient(fileUri);
using (var ms = new MemoryStream())
{
await blobClient.DownloadStreamingAsync();
return ms.ToArray();
}
}
public async Task<BlobDto> UploadAsync(string containerName, string filename, string content)
{
var containerClient = _blobServiceClient.GetBlobContainerClient(containerName);
var blobClient = containerClient.GetBlobClient(filename);
var bytes = Encoding.UTF8.GetBytes(content);
await using var memoryStream = new MemoryStream(bytes);
await blobClient.UploadAsync(content);
return new BlobDto
{
Uri = blobClient.Uri,
Name = blobClient.Name
};
}
}
public interface IBlobService
{
Task<BlobDto> UploadAsync(string containerName, string filename, string content);
Task<byte[]> DownloadAsync(string containerName, string fileUri);
}
Actually this service is receiving full blob url (ie https://{storage-url}.blob.core.windows.net/{container-name}/files/unzip/691ec307-7c2b-4aaa-8f75-8742c9faa9f5/1615015726/ {文件名}.pdf)。
我在這里想念什么嗎?
問題在於以下代碼行:
var blobClient = containerClient.GetBlobClient(fileUri);
當您使用ContainerClient
和GetBlobClient
創建BlobClient
時,您只需提供 blob 的名稱,而不是整個 URL。
要解決此問題,只需傳遞 blob 名稱。
我可以在 CloudBlockBlob 的 Uri 和 Name 屬性的幫助下下載 blob 文件。 如下所示:
public async Task<byte[]> DownloadAsync(string containerName, string fileUri)
{
var containerClient = _blobServiceClient.GetBlobContainerClient(containerName);
var blobUri = new System.Uri(fileUri);
var name = new CloudBlockBlob(blobUri).Name;
var blobClient = containerClient.GetBlobClient(name);
var response = await blobClient.DownloadStreamingAsync();
using MemoryStream ms = new MemoryStream();
await response.Value.Content.CopyToAsync(ms);
ms.Position = 0;
return ms.ToArray();
}
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