private async Task <WSATwitterLoginResult> GetAccessToken(WSATwitterLoginResult result, string oauthVerifier)
{
try
{
IDictionary <string, string> additionalParts = new Dictionary <string, string>()
{
{ "oauth_token", _oauthToken }
};
string authHeader = _headerGenerator.Generate("POST", "https://api.twitter.com//oauth/access_token", additionalParts, null, null);
IDictionary <string, string> body = new Dictionary <string, string>()
{
{ "oauth_verifier", oauthVerifier }
};
HttpResponseMessage response = await MakeRequest("https://api.twitter.com//oauth/access_token", authHeader, new FormUrlEncodedContent(body), HttpMethod.Post);
if (!response.IsSuccessStatusCode)
{
result.Success = false;
result.ErrorMessage = await response.Content.ReadAsStringAsync();
return(result);
}
string content = await response.Content.ReadAsStringAsync();
IDictionary <string, string> parsed = ParseResponse(content);
if (!parsed.ContainsKey("oauth_token") || !parsed.ContainsKey("oauth_token_secret"))
{
result.Success = false;
result.ErrorMessage = "GetAccessToken response does not contain the expected properties";
return(result);
}
if (parsed.ContainsKey("user_id"))
{
result.UserId = parsed["user_id"];
}
if (parsed.ContainsKey("screen_name"))
{
result.ScreenName = parsed["screen_name"];
}
_oauthToken = parsed["oauth_token"];
_oauthTokenSecret = parsed["oauth_token_secret"];
return(result);
}
catch (Exception e)
{
result.Success = false;
result.ErrorMessage = e.Message;
return(result);
}
}
public async Task <WSATwitterLoginResult> Login()
{
Logout();
WSATwitterLoginResult result = new WSATwitterLoginResult()
{
Success = true
};
result = await GetRequestToken(result);
if (!result.Success)
{
return(result);
}
var userLoginResult = await UserLogin(result);
if (!userLoginResult.Item1.Success)
{
return(userLoginResult.Item1);
}
result = await GetAccessToken(userLoginResult.Item1, userLoginResult.Item2);
if (!result.Success)
{
return(result);
}
IsLoggedIn = true;
try
{
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(_savedDataFilename, CreationCollisionOption.ReplaceExisting);
await FileIO.WriteTextAsync(file, string.Format("{0}&{1}", _oauthToken, _oauthTokenSecret));
}
catch
{
}
return(result);
}
private async Task <WSATwitterLoginResult> GetRequestToken(WSATwitterLoginResult result)
{
try
{
IDictionary <string, string> additionalParts = new Dictionary <string, string>()
{
{ "oauth_callback", _oauthCallback }
};
string authHeader = _headerGenerator.Generate("POST", "https://api.twitter.com/oauth/request_token", additionalParts, null, null);
HttpResponseMessage response = await MakeRequest("https://api.twitter.com/oauth/request_token", authHeader, null, HttpMethod.Post);
if (!response.IsSuccessStatusCode)
{
result.Success = false;
result.ErrorMessage = await response.Content.ReadAsStringAsync();
return(result);
}
string content = await response.Content.ReadAsStringAsync();
IDictionary <string, string> parsed = ParseResponse(content);
if (!parsed.ContainsKey("oauth_callback_confirmed") || parsed["oauth_callback_confirmed"] == "false" || !parsed.ContainsKey("oauth_token") || !parsed.ContainsKey("oauth_token_secret"))
{
result.Success = false;
result.ErrorMessage = "GetRequestToken response does not contain the expected properties";
return(result);
}
_oauthToken = parsed["oauth_token"];
_oauthTokenSecret = parsed["oauth_token_secret"];
return(result);
}
catch (Exception e)
{
result.Success = false;
result.ErrorMessage = e.Message;
return(result);
}
}
private async Task <Tuple <WSATwitterLoginResult, string> > UserLogin(WSATwitterLoginResult result)
{
try
{
Uri requestUri = new Uri(string.Format("https://api.twitter.com/oauth/authenticate?oauth_token={0}", _oauthToken));
Uri callbackUri = new Uri(_oauthCallback);
WebAuthenticationResult authentication = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, requestUri, callbackUri);
if (authentication.ResponseStatus != WebAuthenticationStatus.Success)
{
result.Success = false;
result.ErrorMessage = authentication.ResponseStatus.ToString();
return(new Tuple <WSATwitterLoginResult, string>(result, null));
}
IDictionary <string, string> parsed = ParseResponse(authentication.ResponseData);
if ((parsed.ContainsKey("oauth_token") && parsed["oauth_token"] != _oauthToken) || !parsed.ContainsKey("oauth_verifier"))
{
result.Success = false;
result.ErrorMessage = "UserLogin response does not contain the expected properties";
return(new Tuple <WSATwitterLoginResult, string>(result, null));
}
string oauthVerifier = parsed["oauth_verifier"];
return(new Tuple <WSATwitterLoginResult, string>(result, oauthVerifier));
}
catch (Exception e)
{
result.Success = false;
result.ErrorMessage = e.Message;
return(new Tuple <WSATwitterLoginResult, string>(result, null));
}
}
