Can't delete Azure Storage Table using Azure REST API - azure

Question

I am getting an error "Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature."
I followed the authorization tutorial provided by Microsoft, Delete Table, Authentication for the Azure Storage Services.
Am I missing anything?

Answer 1

It seems that you’d like to delete table via rest api.
DELETE https://myaccount.table.core.windows.net/Tables('mytable')
the following sample works fine on my side, please refer to the code to generate the signature.
string StorageAccount = "account name here";
string StorageKey = "account key here";
string tablename = "table name";
string requestMethod = "DELETE";
string mxdate = "";
string storageServiceVersion = "2015-12-11";
protected void Button1_Click(object sender, EventArgs e)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(string.Format(CultureInfo.InvariantCulture,
"https://{0}.table.core.windows.net/Tables('{1}')",
StorageAccount, tablename));
req.Method = requestMethod;
//specify request header
string AuthorizationHeader = generateAuthorizationHeader();
req.Headers.Add("Authorization", AuthorizationHeader);
req.Headers.Add("x-ms-date", mxdate);
req.Headers.Add("x-ms-version", storageServiceVersion);
req.ContentType = "application/json";
req.Accept = "application/json;odata=minimalmetadata";
using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())
{
}
}
public string generateAuthorizationHeader()
{
mxdate = DateTime.UtcNow.ToString("R");
string canonicalizedResource = $"/{StorageAccount}/Tables('{tablename}')";
string contentType = "application/json";
string stringToSign = $"{requestMethod}\n\n{contentType}\n{mxdate}\n{canonicalizedResource}";
HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String(StorageKey));
string signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
String authorization = String.Format("{0} {1}:{2}",
"SharedKey",
StorageAccount,
signature
);
return authorization;
}