Send a GCM Native Notification through REST in Azure notification hub - azure

Question

I am trying to call a Azure Notification Hub REST API , based on this documentation. As they said , I tried to create a Header of API and it giving me an error "The credentials contained in the authorization header are not in the WRAP format".
My Demo DefaultFullSharedAccessSignature is :
Endpoint=sb://shinetrialhub-ns.servicebus.windows.net/;SharedAccessKeyName=DefaultFullSharedAccessSignature;SharedAccessKey=BaGJbFDQZ+hkbi2MdUj7gU0tOM+aC/k+mez9J/y54Qc=
Here my API: https://shinetrialhub-ns.servicebus.windows.net/shinetrialhub/messages/?api-version=2015-01
by adding valid header (please see the MSDN document)

Answer 1

You need to generate Shared Access Signature Authentication with Service Bus. I've been using code below to achieve this:
resourceUri: https://shinetrialhub-ns.servicebus.windows.net/shinetrialhub/
keyName: RootManageSharedAccessKey
key: the value for RootManageSharedAccessKey
private string GetSasToken(string resourceUri, string keyName, string key)
{
var expiry = GetExpiry();
var stringToSign = HttpUtility.UrlEncode(resourceUri) + "\n" + expiry;
var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(key));
var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
var sasToken = string.Format(CultureInfo.InvariantCulture,
"SharedAccessSignature sr={0}&sig={1}&se={2}&skn={3}",
HttpUtility.UrlEncode(resourceUri), HttpUtility.UrlEncode(signature), expiry, keyName);
return sasToken;
}
private string GetExpiry()
{
var sinceEpoch = DateTime.UtcNow - new DateTime(1970, 1, 1);
return Convert.ToString((int) sinceEpoch.TotalSeconds + 102000); //token valid for that many seconds
}
Also make sure you have all the right headers, as shown in the documentation.