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using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Blob;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Web;
namespace Tango.MachineService.Helpers
{
public static class StorageHelper
{
public static CloudBlobClient GetStorageBlobClient()
{
String storageAddress = ConfigurationManager.AppSettings["Storage"].ToString();
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageAddress);
return storageAccount.CreateCloudBlobClient();
}
public static CloudBlobContainer GetTangoVersionsContainer(CloudBlobClient client)
{
var container = client.GetContainerReference("tango-versions");
return container;
}
public static CloudBlockBlob CreateEmptyBlob(CloudBlobContainer container, String name)
{
CloudBlockBlob emptyBlob = container.GetBlockBlobReference(name);
using (MemoryStream ms = new MemoryStream())
{
emptyBlob.UploadFromStream(ms);//Empty memory stream. Will create an empty blob.
}
return emptyBlob;
}
public static String GenerateBlobReadSignature(CloudBlockBlob blob, TimeSpan duration)
{
String signature = blob.GetSharedAccessSignature(new SharedAccessBlobPolicy()
{
SharedAccessStartTime = DateTime.UtcNow,
SharedAccessExpiryTime = DateTime.UtcNow.Add(duration),
Permissions = SharedAccessBlobPermissions.Read
});
return new Uri(blob.Uri + signature).ToString();
}
public static String GenerateBlobWriteSignature(CloudBlockBlob blob, TimeSpan duration)
{
String signature = blob.GetSharedAccessSignature(new SharedAccessBlobPolicy()
{
SharedAccessStartTime = DateTime.UtcNow,
SharedAccessExpiryTime = DateTime.UtcNow.Add(duration),
Permissions = SharedAccessBlobPermissions.Write
});
return new Uri(blob.Uri + signature).ToString();
}
}
}
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