public static async Task <string> StartUserAuthentication(this IUserSession session)
{
if (string.IsNullOrWhiteSpace(session.clientID))
{
throw new ArgumentException("ClientID must be specified", session.clientID);
}
if (string.IsNullOrWhiteSpace(session.clientSecret))
{
throw new ArgumentException("ClientSecret must be specified", session.clientSecret);
}
if (session.PlatformAdaptor == null)
{
throw new ArgumentException("Need a Platform Adaptor");
}
var sinceEpoch = session.GenerateTimestamp();
var nonce = session.GenerateNoonce();
var sigBaseStringParams =
string.Format(
"oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method=HMAC-SHA1&oauth_timestamp={2}&oauth_version=1.0",
session.clientID,
nonce,
sinceEpoch);
var sigBaseString = string.Format("POST&{0}&{1}", TwitterApi.RequestTokenUrl().UrlEncode(), sigBaseStringParams.UrlEncode());
var signature = session.GenerateSignature(session.clientSecret, sigBaseString, null);
var dataToPost = string.Format(
"OAuth realm=\"\", oauth_nonce=\"{0}\", oauth_timestamp=\"{1}\", oauth_consumer_key=\"{2}\", oauth_signature_method=\"HMAC-SHA1\", oauth_version=\"1.0\", oauth_signature=\"{3}\"",
nonce,
sinceEpoch,
session.clientID,
signature.UrlEncode());
var response = await PostData(TwitterApi.RequestTokenUrl(), dataToPost);
if (string.IsNullOrWhiteSpace(response))
{
return(null);
}
var oAuthToken = "";
foreach (var splits in response.Split('&').Select(t => t.Split('=')))
{
switch (splits[0])
{
case "oauth_token": //these tokens are request tokens, first step before getting access tokens
oAuthToken = splits[1];
break;
case "oauth_token_secret": // not used
// var oAuthTokenSecret = splits[1];
break;
case "oauth_callback_confirmed":
break;
}
}
if (!string.IsNullOrWhiteSpace(oAuthToken))
{
session.PlatformAdaptor.DisplayAuthInBrowser(TwitterApi.AuthenticateUrl() + oAuthToken);
}
return(oAuthToken);
}
public static async Task <TwitterCredentials> Authentication(this IUserSession session, string _callbackuri)
{
if (string.IsNullOrWhiteSpace(session.clientID))
{
throw new ArgumentException("ClientID must be specified", session.clientID);
}
if (string.IsNullOrWhiteSpace(session.clientSecret))
{
throw new ArgumentException("ClientSecret must be specified", session.clientSecret);
}
var sinceEpoch = session.GenerateTimestamp();
var nonce = session.GenerateNoonce();
var sigBaseStringParams =
string.Format(
"oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method=HMAC-SHA1&oauth_timestamp={2}&oauth_version=1.0",
session.clientID,
nonce,
sinceEpoch);
var sigBaseString = string.Format("POST&{0}&{1}", TwitterApi.RequestTokenUrl().UrlEncode(), sigBaseStringParams.UrlEncode());
var signature = session.GenerateSignature(session.clientSecret, sigBaseString, null);
var dataToPost = string.Format(
"OAuth realm=\"\", oauth_nonce=\"{0}\", oauth_timestamp=\"{1}\", oauth_consumer_key=\"{2}\", oauth_signature_method=\"HMAC-SHA1\", oauth_version=\"1.0\", oauth_signature=\"{3}\"",
nonce,
sinceEpoch,
session.clientID,
signature.UrlEncode());
var response = await PostData(TwitterApi.RequestTokenUrl(), dataToPost);
if (string.IsNullOrWhiteSpace(response))
{
return(TwitterCredentials.Null);
}
var oauthCallbackConfirmed = false;
var oAuthToken = "";
foreach (var splits in response.Split('&').Select(t => t.Split('=')))
{
switch (splits[0])
{
case "oauth_token": //these tokens are request tokens, first step before getting access tokens
oAuthToken = splits[1];
break;
case "oauth_token_secret":
var OAuthTokenSecret = splits[1];
break;
case "oauth_callback_confirmed":
if (splits[1].ToLower() == "true")
{
oauthCallbackConfirmed = true;
}
break;
}
}
if (oauthCallbackConfirmed && !string.IsNullOrWhiteSpace(oAuthToken))
{
var authresponse = await session.PlatformAdaptor.AuthWithBroker(TwitterApi.AuthenticateUrl() + oAuthToken, _callbackuri);
if (!string.IsNullOrWhiteSpace(authresponse))
{
var responseData = authresponse.Substring(authresponse.IndexOf("oauth_token"));
string request_token = null;
string oauth_verifier = null;
String[] keyValPairs = responseData.Split('&');
foreach (var t in keyValPairs)
{
var splits = t.Split('=');
switch (splits[0])
{
case "oauth_token":
request_token = splits[1];
break;
case "oauth_verifier":
oauth_verifier = splits[1];
break;
}
}
sinceEpoch = session.GenerateTimestamp();
nonce = session.GenerateNoonce();
sigBaseStringParams = string.Format(
"oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method=HMAC-SHA1&oauth_timestamp={2}&oauth_token={3}&oauth_version=1.0",
session.clientID,
nonce,
sinceEpoch,
request_token);
sigBaseString = string.Format("POST&{0}&{1}", TwitterApi.AuthorizeTokenUrl().UrlEncode(), sigBaseStringParams.UrlEncode());
signature = session.GenerateSignature(session.clientSecret, sigBaseString, null);
var httpContent = String.Format("oauth_verifier={0}", oauth_verifier);
dataToPost = string.Format(
"OAuth realm=\"\", oauth_nonce=\"{0}\", oauth_timestamp=\"{1}\", oauth_consumer_key=\"{2}\", oauth_signature_method=\"HMAC-SHA1\", oauth_version=\"1.0\", oauth_token=\"{3}\", oauth_signature=\"{4}\"",
nonce,
sinceEpoch,
session.clientID,
request_token,
signature.UrlEncode());
response = await PostData(TwitterApi.AuthorizeTokenUrl(), dataToPost, httpContent);
if (string.IsNullOrWhiteSpace(response))
{
return(TwitterCredentials.Null); //oops something wrong here
}
var _accessToken = "";
var _accessTokenSecret = "";
var _userId = "";
var _screenName = "";
foreach (var splits in response.Split('&').Select(t => t.Split('=')))
{
switch (splits[0])
{
case "oauth_token": //these tokens are request tokens, first step before getting access tokens
_accessToken = splits[1];
break;
case "oauth_token_secret":
_accessTokenSecret = splits[1];
break;
case "user_id":
_userId = splits[1];
break;
case "screen_name":
_screenName = splits[1];
break;
}
}
if (_accessToken != null && _accessTokenSecret != null && _userId != null && _screenName != null)
{
return(new TwitterCredentials()
{
ConsumerKey = session.clientID,
ConsumerSecret = session.clientSecret,
ScreenName = _screenName,
Token = _accessToken,
TokenSecret = _accessTokenSecret,
UserID = Int64.Parse(_userId),
Valid = true
});
}
return(TwitterCredentials.Null);
}
}
return(TwitterCredentials.Null);
}