// Step 2 - Generate User Credentials
public ITwitterCredentials GetCredentialsFromVerifierCode(string verifierCode, IAuthenticationToken authToken)
{
try
{
if (verifierCode == null)
{
throw new ArgumentNullException("VerifierCode", "If you've received a verifier code that is null, " +
"it means that authentication has failed!");
}
var callbackParameter = _oAuthWebRequestGenerator.GenerateParameter("oauth_verifier", verifierCode, true, true, false);
var authHandler = new AuthHttpHandler(callbackParameter, authToken);
var response = _twitterRequestHandler.ExecuteQuery(Resources.OAuthRequestAccessToken, HttpMethod.POST, authHandler,
new TwitterCredentials(authToken.ConsumerCredentials));
if (response == null)
{
return null;
}
var responseInformation = Regex.Match(response, Resources.OAuthTokenAccessRegex);
if (responseInformation.Groups["oauth_token"] == null || responseInformation.Groups["oauth_token_secret"] == null)
{
return null;
}
var credentials = new TwitterCredentials(
authToken.ConsumerKey,
authToken.ConsumerSecret,
responseInformation.Groups["oauth_token"].Value,
responseInformation.Groups["oauth_token_secret"].Value);
return credentials;
}
catch (TwitterException ex)
{
if (_exceptionHandler.LogExceptions)
{
_exceptionHandler.AddTwitterException(ex);
}
if (!_exceptionHandler.SwallowWebExceptions)
{
throw;
}
}
return null;
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
await AuthTokens.KeyRetriever();
_appCredentials = new TwitterCredentials(AuthTokens.TwitterConsumerKey, AuthTokens.TwitterConsumerSecret);
TwitterAuthenticatorMethod();
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
SystemNavigationManager.GetForCurrentView().BackRequested += (s, ex) =>
{
var frame = Window.Current.Content as Frame;
if (frame != null)
{
frame.Navigate(typeof(MainPage));
}
};
}
public bool authenticateUser(string userAccessToken, string userAccessTokenSecret)
{
if (this.userCredentials == null)
{
var userCredentials = new TwitterCredentials(this.ConsumerKey, this.ConsumerSecret, userAccessToken, userAccessTokenSecret);
this.User = Tweetinvi.User.GetAuthenticatedUser(userCredentials);
if(this.user != null)
{
storeUserCredentials(userCredentials.AccessToken, userCredentials.AccessTokenSecret);
this.twitterUser = new TwitterUser(this.user);
return true;
}
}
else
throw new Exception("User credensials cannot be null");
return false;
}
public static double ProfileFrequency(string query)
{
if (profiledQueries.ContainsKey(query))
return profiledQueries[query];
if (!IsNextRequestPossible())
SleepUntilNextRequest();
var credentials = new TwitterCredentials(
ConfigurationManager.AppSettings["ConsumerKey"],
ConfigurationManager.AppSettings["ConsumerSecret"],
ConfigurationManager.AppSettings["WorkerToken"],
ConfigurationManager.AppSettings["WorkerSecret"]
);
exceptionError = "";
List<DateTime> tweetsDateTime = new List<DateTime>();
Auth.ExecuteOperationWithCredentials(credentials, () =>
{
int profilingRetries = 0;
TweetSearchParameters searchParams = new TweetSearchParameters(query) { SearchType = SearchResultType.Recent };
// retry profiling a few times if there is no response
while (profilingRetries <= Convert.ToInt32(ConfigurationManager.AppSettings["TwitterProfilerRetries"]))
{
var tweets = Search.SearchTweets(searchParams);
if (tweets == null)
{
var latestException = ExceptionHandler.GetLastException();
exceptionError = latestException.TwitterDescription;
profilingRetries++;
}
else
{
++numberOfRequestsMade;
exceptionError = "";
foreach (var tweet in tweets)
tweetsDateTime.Add(tweet.CreatedAt);
break;
}
}
});
lastRequest = DateTime.Now;
nextPossibleRequest = DateTime.Now.AddMilliseconds(Convert.ToInt32(ConfigurationManager.AppSettings["TwitterProfilerRateLimitMs"]));
double returnFrequency = double.Epsilon;
if (tweetsDateTime.Count == 0 || tweetsDateTime.Count == 1)
{
if (exceptionError != "") { returnFrequency = (int)InvalidReturns.Exception; }
profiledQueries.Add(query, returnFrequency);
Console.WriteLine("Query [{0}] has frequency {1}", query, returnFrequency);
return returnFrequency;
}
tweetsDateTime.Sort();
TimeSpan timeDiffBetweenTweets = tweetsDateTime.Last().Subtract(tweetsDateTime.First());
returnFrequency = (tweetsDateTime.Count-1)/((Math.Abs(timeDiffBetweenTweets.TotalMilliseconds)+1)/1000.0);
profiledQueries.Add(query, returnFrequency);
Console.WriteLine("Query [{0}] has frequency {1}", query, returnFrequency);
return returnFrequency;
}
public ITwitterCredentials GenerateToken(IAuthenticationToken authToken)
{
var callbackParameter = _oAuthWebRequestGenerator.GenerateParameter("oauth_verifier", authToken.VerifierCode, true, true, false);
try
{
var authHandler = new AuthHttpHandler(callbackParameter, authToken);
var response = _twitterRequestHandler.ExecuteQuery(Resources.OAuthRequestAccessToken, HttpMethod.POST, authHandler,
new TwitterCredentials(authToken.ConsumerCredentials));
if (response == null)
{
return null;
}
Match responseInformation = Regex.Match(response, "oauth_token=(?<oauth_token>(?:\\w|\\-)*)&oauth_token_secret=(?<oauth_token_secret>(?:\\w)*)&user_id=(?<user_id>(?:\\d)*)&screen_name=(?<screen_name>(?:\\w)*)");
var credentials = new TwitterCredentials();
credentials.AccessToken = responseInformation.Groups["oauth_token"].Value;
credentials.AccessTokenSecret = responseInformation.Groups["oauth_token_secret"].Value;
credentials.ConsumerKey = authToken.ConsumerKey;
credentials.ConsumerSecret = authToken.ConsumerSecret;
return credentials;
}
catch (TwitterException ex)
{
LogExceptionOrThrow(ex);
}
return null;
}
public void authenticateApp()
{
if(this.userCredentials == null)
{
// Create a new set of credentials for the application.
var appCredentials = new TwitterCredentials(this.ConsumerKey, this.ConsumerSecret);
// Init the authentication process and store the related `AuthenticationContext`.
this.authenticationContext = AuthFlow.InitAuthentication(appCredentials);
// Go to the URL so that Twitter authenticates the user and gives him a PIN code.
Process.Start(authenticationContext.AuthorizationURL);
}
}
private void StartTask(List<string> streamingQueries, List<string> streamingQueriesIDs, List<ArrayList<ArrayList<QueryToken>>> searchTokens, List<string> searchQueriesIDs, Dictionary<string, string> streamingQueryEntities, List<string> authData)
{
if (authData.Count != 4)
{
StreamLogger.writeErrorToConsoleAndExit(streamTaskId, String.Format("Twitter authentication data requires exactly 4 values, {0} given", authData.Count),
"TwitterStreamingDacq.StreamTask", "StartTask");
}
if (streamingQueries.Count != streamingQueriesIDs.Count)
{
StreamLogger.writeErrorToConsoleAndExit(streamTaskId, String.Format("Length of queries {0} does not mach the length of queries IDs {1}", streamingQueries.Count, streamingQueriesIDs.Count),
"TwitterStreamingDacq.StreamTask", "StartTask");
}
var credentials = new TwitterCredentials(
authData[0], // ConsumerKey
authData[1], // ConsumerSecret
authData[2], // WorkerToken
authData[3] // WorkerSecret
);
filteredStream = Stream.CreateFilteredStream(credentials);
// match queries only on the tweets text
filteredStream.MatchOn = MatchOn.TweetText;
for (int i = 0; i < streamingQueries.Count; ++i)
{
string track = streamingQueries[i];
string streamingQueryID = streamingQueriesIDs[i];
string queryIDbase = StreamConfigParser.ExtractQueryIDBase(streamingQueryID);
string entity = "";
if (streamingQueryEntities.ContainsKey(queryIDbase))
entity = streamingQueryEntities[queryIDbase];
filteredStream.AddTrack(track, tweet =>
{
// triggered when this query gets a tweet
StreamToSearchAssigner ssa = new StreamToSearchAssigner();
List<string> matchingSearchIds = ssa.AssignStreamToSearch(tweet, streamingQueryID, searchTokens, searchQueriesIDs);
if (matchingSearchIds.Count > 0)
{
// check if json tweet matches the retrieved tweet
var jsonConvert = TweetinviContainer.Resolve<IJsonObjectConverter>();
var tweetDTO = jsonConvert.DeserializeObject<ITweetDTO>(lastTweetJson);
var tweetFromJson = Tweet.GenerateTweetFromDTO(tweetDTO);
bool matchingId = tweetFromJson.IdStr == tweet.IdStr;
if (tweet.IsTweetDestroyed)
CreateTweetDeleteNotification(tweet);
// if the recieved json of the tweet does not match the tracked tweet skip it and create a warning
if (tweetFromJson.IdStr == tweet.IdStr)
{
// match entity
if (String.IsNullOrEmpty(entity))
{
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("Entity for sreaming query {0} could not be found! Entity set to {1}.", streamingQueryID, queryIDbase), StreamLogger.msgType.Warning,
"TwitterStreamingDacq.StreamTask", "StartTask.AddTrack", true);
entity = queryIDbase;
}
// save to nest db
PutStreamedTweetToNest(entity, tweet, lastTweetJson);
}
else
{
StreamLogger.writeMsgToConsole(streamTaskId, "Retrived JSON tweet and matched tweet do not match. Skipping this tweet", StreamLogger.msgType.Warning,
"TwitterStreamingDacq.StreamTask", "StartTask.AddTrack", true);
}
}
});
}
filteredStream.JsonObjectReceived += (sender, args) =>
{
lastTweetJson = args.Json;
};
filteredStream.DisconnectMessageReceived += (senderTwt, argsTwt) =>
{
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("DisconnectMessageReceived! {0}", argsTwt.DisconnectMessage), StreamLogger.msgType.Warning,
"TwitterStreamingDacq.StreamTask", "StartTask.DisconnectMessageReceived", true);
};
// notifies that stream attempts to access more than 1% of the total tweets published
filteredStream.LimitReached += (sender, args) =>
{
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("Streaming limit reached! {0} tweets were not received from the start of streaming.",
args.NumberOfTweetsNotReceived), StreamLogger.msgType.Warning,
"TwitterStreamingDacq.StreamTask", "StartTask.LimitReached", true);
};
// notifies that a tweet has been deleted
filteredStream.TweetDeleted += (sender, args) =>
{
PutDeletedNotificationToNest(args.TweetDeletedInfo);
};
filteredStream.StreamStarted += (sender, args) =>
{
StreamLogger.writeMsgToConsole(streamTaskId, "Streaming started", StreamLogger.msgType.Empty, "", "", true);
};
// let us manage the exceptions from Tweetinvi
ExceptionHandler.SwallowWebExceptions = false;
// streaming has stopped, check for exception, log it, restart streaming
filteredStream.StreamStopped += (sender, args) =>
{
var disconnectMessage = args.DisconnectMessage;
var exception = args.Exception;
StreamLogger.writeMsgToConsole(streamTaskId, "Streaming stopped", StreamLogger.msgType.Empty,
"", "", true);
if (disconnectMessage != null)
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("Disconnect message: {0}", disconnectMessage), StreamLogger.msgType.Error,
"TwitterStreamingDacq.StreamTask", "StartTask.StreamStopped", true);
if (exception != null)
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("Exception message: {0}", exception.Message), StreamLogger.msgType.Error,
"TwitterStreamingDacq.StreamTask", "StartTask.StreamStopped", true);
};
DateTime streamStartedTime = new DateTime();
int numOfStreamRestarts = 0;
int numOfMaxStreamRestarts = Convert.ToInt32(ConfigurationManager.AppSettings["StreamTimeoutRestarts"]);
if (numOfMaxStreamRestarts < 0)
numOfMaxStreamRestarts = Int32.MaxValue;
// start streaming
while (true)
{
streamStartedTime = DateTime.Now;
try
{
filteredStream.StartStreamMatchingAnyCondition();
}
catch (Exception exception)
{
StreamLogger.writeMsgToConsole(streamTaskId, String.Format("Exception message: {0}", exception.Message), StreamLogger.msgType.Error,
"TwitterStreamingDacq.StreamTask", "StartTask.StartStreamLoop", true);
Console.WriteLine(exception.StackTrace);
}
// twitter hates too many streaming restarts in a short period of time, so wait a little bit before restarting
Thread.Sleep(15000);
// if there are too many restarts in a short period shutdown this loop altogether
if (DateTime.Now.Subtract(streamStartedTime).TotalSeconds < 60)
numOfStreamRestarts++;
else
numOfStreamRestarts = 0;
if (numOfStreamRestarts >= numOfMaxStreamRestarts)
{
StreamLogger.writeErrorToConsoleAndExit(streamTaskId, "Stream stopped completely due to too many restarts",
"TwitterStreamingDacq.StreamTask", "StartTask.StartStreamLoop");
break;
}
}
}
