How can I use URLLOader to read a blob from a private container?

I have a flex application which is hosted on Azure.

I have some data stored in a blob in a private container.

How can I use URLLoader to display the data? If I use a public container , then I am able to read from the blob in my application. However, 开发者_如何学Pythonif the type of the container is private URLLoader fails.

Any ideas on this?

---

Azure provides a SharedAccessSignature method to allow you to temporarily allow third parties to access blobs via HTTP.

This sample code from SetPermissions on MSDN shows you how to create a shared access policy - http://msdn.microsoft.com/en-us/library/ee758387.aspx

// Get the shared access signature to share with users, specifying a signature-level access policy.
string sas = container.GetSharedAccessSignature(new SharedAccessPolicy()
{
    SharedAccessStartTime = DateTime.Now,
    SharedAccessExpiryTime = DateTime.Now.AddHours(10),
    Permissions = SharedAccessPermissions.Write | SharedAccessPermissions.Read
});

Once you have a shared access policy then it is basically a query string to add on to the end of your normal HTTP GET URL

---

You may need to look at Blob Container Access Policies and Signed Blob URL. You can define a time range to container access policies (can have upto 5 container access policies) for a time period you want to allow access. Windows Azure allows to generate signed blob url using container access policies. You can also create a signed blob url without using container access policy, but that url will be valid for a maximum of one hour. Generated signed blob url allows access to the blob even if blob container is private. Please find more information from here and here.