static object GetInitiator(
NancyContext context,
IConfiguration configuration)
{
context.Ensure("context");
configuration.Ensure("configuration");
var returnUrl = context.Request.Query["return-url"].Value as string;
if (!String.IsNullOrEmpty(returnUrl))
context.SetReturnUrl(returnUrl);
var callbackUri = fn.MakeAbsoluteUri(Paths.TwitterAuthReceiver());
var oAuthRequest = OAuthRequest.ForRequestToken(
configuration.TwitterAuthConsumerKey,
configuration.TwitterAuthConsumerSecret,
callbackUri.ToString());
oAuthRequest.RequestUrl = Constants.TwitterAuth.RequestTokenUrl;
var response = fn.SendGet(
new Uri(oAuthRequest.RequestUrl),
addHeader => addHeader("Authorization", oAuthRequest.GetAuthorizationHeader()));
var @params = fn.ParseQueryString(response);
var token = @params[Constants.TwitterAuth.OAuthTokenParamName];
if (String.IsNullOrEmpty(token))
throw new InvalidOperationException(Strings.OAuthTokenMissing());
context.WriteSession(Constants.TwitterAuth.SessionKey, token);
return context.Redirect(string.Format(
CultureInfo.InvariantCulture,
Constants.TwitterAuth.AuthenticatehUrlFormat,
token));
}