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using Microsoft.WindowsAzure.Storage.Blob;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.Web.Storage
{
public static class ExtensionMethods
{
public static CloudBlockBlob CreateEmptyBlob(this 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 GenerateReadSignature(this 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 GenerateWriteSignature(this 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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