AugusteVN.Azure.BlobStorage 1.0.8

Azure Blob Storage

Upload a file to Azure Blob Storage or generate a SAS URL.

Configuration

appsettings.json

{
  "BlobStorageConfig": {
    "ConnectionString": "<to-fill>",
    "AccountName": "<to-fill>",
    "AccountKey": "<to-fill-optional>"
  }
}

Program.cs

builder.Services
    .AddOptions<BlobStorageConfig>()
    .BindConfiguration(nameof(BlobStorageConfig));

builder.Services.AddSingleton<IBlobStorageClient, BlobStorageClient>();

// Or initialize

var blobStorageClient = new BlobStorageClient(
    new BlobStorageConfig {
       ConnectionString = "<to-fill>",
       AccountName = "<to-fill>",
       AccountKey = "<to-fill-optional>" // To generate URLs with SAS tokens.
    });

Upload File

Program.cs

app.MapPost("/", async (IFormFile file, IBlobStorageClient blobStorageClient) => {
    
    var url = await blobStorageClient.UploadSingleAsync(
        "targetContainerName"
        file.FileName,
        file.OpenReadStream()
    );
    
    return Results.Ok(new { Url = url });
});

Generate URL with SAS token

Generates an URL including a SAS token that grants read access for a given duration. This requires the AccountKey to be configured in the appsettings.json.

Program.cs

app.MapGet("/", (IBlobStorageClient blobStorageClient) => {
    
    var sasUrl = await blobStorageClient.GenerateSasUrlForBlob(
        containerName: "targetContainerName",
        blobName: "example.png",
        expiresOn: DateTimeOffset.UtcNow.AddHours(24) // <-- default value
    );
    
    return Results.Ok(new { Url = sasUrl });
});

To see it in action, watch: File Upload - Blazor to Minimal API to Azure with C# .NET 8.