asp.net-mvc – Azure下载blob文件流/ memorystream

我希望用户能够从我的网站下载blob.我想要最快/ cheapeast /最好的方式来做到这一点.

这是我想出的：

CloudBlobContainer blobContainer = CloudStorageServices.GetCloudBlobsContainer();

        CloudBlockBlob blob = blobContainer.GetBlockBlobReference(blobName);
        MemoryStream memStream = new MemoryStream();
        blob.DownloadToStream(memStream);

        Response.ContentType = blob.Properties.ContentType;
        Response.AddHeader("Content-Disposition","Attachment; filename=" + fileName + fileExtension);
        Response.AddHeader("Content-Length",(blob.Properties.Length).ToString());
        Response.BinaryWrite(memStream.ToArray());
        Response.End();

我现在正在使用内存流,但我猜我应该使用文件流,因为在某些情况下,blob是大的..对吧？

我尝试使用文件流,但我失败了.想想你可以给我一些文件流代码？

解决方法

例如,看下面的代码：

public ActionResult Download()
    {
        CloudStorageAccount account = new CloudStorageAccount(new StorageCredentials("accountname","accountkey"),true);
        var blobClient = account.CreateCloudBlobClient();
        var container = blobClient.GetContainerReference("container-name");
        var blob = container.GetBlockBlobReference("file-name");
        var sasToken = blob.GetSharedAccessSignature(new SharedAccessBlobPolicy()
            {
                Permissions = SharedAccessBlobPermissions.Read,SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(10),//assuming the blob can be downloaded in 10 miinutes
            },new SharedAccessBlobHeaders()
            {
                ContentDisposition = "attachment; filename=file-name"
            });
        var blobUrl = string.Format("{0}{1}",blob.Uri,sasToken);
        return Redirect(blobUrl);
    }

（编辑：安卓应用网）

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