/// <summary>
/// After the user Authorizes the app, Twitter will
/// redirect to the callback url, provided during
/// BeginAuthorization. When redirecting, Twitter will
/// also provide oauth_verifier and oauth_token
/// parameters. This method uses those parameters to
/// request an access token, which is used automatically
/// by LINQ to Twitter when executing queries.
/// </summary>
/// <param name="callback">URL that Twitter redirected to after authorization</param>
/// <returns>True if successful</returns>
public bool CompleteAuthorization(Uri callback)
{
if (callback == null)
{
throw new ArgumentNullException("callback", "You must pass in the callback that Twitter returned after authentication.");
}
if (IsAuthorized)
{
return(true);
}
string verifier = OAuthTwitter.GetUrlParamValue(callback.Query, "oauth_verifier");
if (verifier != null)
{
string oAuthToken = OAuthTwitter.GetUrlParamValue(callback.Query, "oauth_token");
string screenName;
string userID;
OAuthTwitter.AccessTokenGet(oAuthToken, verifier, OAuthAccessTokenUrl, string.Empty, out screenName, out userID);
ScreenName = screenName;
UserId = userID;
Credentials.OAuthToken = OAuthTwitter.OAuthToken;
Credentials.AccessToken = OAuthTwitter.OAuthTokenSecret;
Credentials.ScreenName = screenName;
Credentials.UserId = userID;
}
return(IsAuthorized);
}
/// <summary>
/// Asynchronously finishes the authorization process
/// </summary>
/// <param name="callback">Callback Url that Twitter has added parameters to</param>
/// <param name="authorizationCompleteCallback">Action you provide for when authorization completes.</param>
public void CompleteAuthorize(Uri callback, Action <TwitterAsyncResponse <UserIdentifier> > authorizationCompleteCallback)
{
if (IsAuthorized)
{
return;
}
const int QueryPart = 1;
string[] callbackParts = callback.OriginalString.Split('?');
if (callbackParts.Length == 2)
{
string oauthToken = OAuthTwitter.GetUrlParamValue(callbackParts[QueryPart], "oauth_token");
Credentials.OAuthToken = oauthToken;
OAuthTwitter.OAuthToken = oauthToken;
// we have to split on # because Twitter appends #PageName at the end of the url,
// which identifies the Silverlight page to navigate to, but is not part of the verifier
string verifier =
OAuthTwitter
.GetUrlParamValue(callbackParts[QueryPart], "oauth_verifier")
.Split('#')[0];
if (verifier != null)
{
OAuthTwitter.GetAccessTokenAsync(verifier, new Uri(OAuthAccessTokenUrl), null, authorizationCompleteCallback);
}
}
}
