/// <summary>
/// Generate the request credentials parameters from an AuthenticationTokenProvider
/// If the url does not contain the expected input or the token provider cannot find
/// the authentication token, this will return an error.
/// </summary>
/// <exception cref="ArgumentException">When callback url is not properly formatted</exception>
public static async Task <IRequestCredentialsParameters> FromCallbackUrlAsync(string callbackUrl, IAuthenticationRequestStore authenticationRequestStore)
{
var tokenId = authenticationRequestStore.ExtractAuthenticationRequestIdFromCallbackUrl(callbackUrl);
var authToken = await authenticationRequestStore.GetAuthenticationRequestFromIdAsync(tokenId).ConfigureAwait(false);
if (authToken == null)
{
throw new Exception("Could not retrieve the authentication token");
}
await authenticationRequestStore.RemoveAuthenticationTokenAsync(tokenId).ConfigureAwait(false);
var oAuthVerifier = callbackUrl.GetURLParameter("oauth_verifier");
if (oAuthVerifier == null)
{
throw new ArgumentException($"oauth_verifier query parameter not found, this is required to authenticate the user", nameof(callbackUrl));
}
return(new RequestCredentialsParameters(oAuthVerifier, authToken));
}
