Azure Functions で Azure Blob Storage からファイルを取得する

検証環境

Azure Functions v3
Azure.Storage.Blobs v12.8.0

実装

Azure Functions のプロジェクトに NuGet で「Azure.Storage.Blobs」をインストールする。

using Azure.Storage.Blobs;

private static string connectionString = "YOUR CONNECTION STRING";
private static string blobContainerName = "CONTAINER_NAME";
private static string blobName = "BLOB_NAME";

private static async Task<byte[]> Download()
{
    var blobServiceClient = new BlobServiceClient(connectionString);
    var blobContainerClient = blobServiceClient.GetBlobContainerClient(blobContainerName);
    var blobClient = blobContainerClient.GetBlobClient(blobName);

    using (var stream = new MemoryStream())
    {
        var response = await blobClient.DownloadToAsync(stream).ConfigureAwait(false);
        return stream.ToArray();
    }
}