/// <summary>
/// Calculate the OAuth Signature for this request using custom parameters.
/// </summary>
/// <param name="parameters">The set of parameters to be included in the signature.</param>
/// <param name="consumerSecret">The OAuth Consumer Secret to use.</param>
/// <returns>The calculated OAuth Signature.</returns>
/// <remarks>
/// This is typically used by Tool Consumers that perform custom parameter substitution prior
/// to signing the request.
/// </remarks>
public string GenerateSignature(NameValueCollection parameters, string consumerSecret)
{
// The LTI spec says to include the querystring parameters
// when calculating the signature base string. Unescape the
// query so that it is not doubly escaped by UrlEncodingParser.
var querystring = new UrlEncodingParser(Uri.UnescapeDataString(Url.Query));
parameters.Add(querystring);
var signature = OAuthUtility.GenerateSignature(HttpMethod, Url, parameters, consumerSecret);
// Now remove the querystring parameters so they are not sent twice
// (once in the action URL and once in the form data)
foreach (var key in querystring.AllKeys)
{
parameters.Remove(key);
}
return(signature);
}
/// <summary>
/// Calculate the OAuth Signature for this request using custom parameters.
/// </summary>
/// <param name="parameters">The set of parameters to be included in the signature.</param>
/// <param name="consumerSecret">The OAuth Consumer Secret to use.</param>
/// <returns>The calculated OAuth Signature.</returns>
/// <remarks>
/// This is typically used by Tool Consumers that perform custom parameter substitution prior
/// to signing the request.
/// </remarks>
public string GenerateSignature(NameValueCollection parameters, string consumerSecret)
{
var signature = OAuthUtility.GenerateSignature(HttpMethod, Url, parameters, consumerSecret);
return(signature);
}