public ActionResult Twitter(string currentFilter, string searchString, int? page)
{
if (searchString != null)
{
page = 1;
}
else
{
searchString = currentFilter;
}
ViewBag.CurrentFilter = searchString;
ViewBag.Message = "Twitter page.";
var ctx = new TweetContext();
IQueryable<Tweet> twts = ctx.Tweets.OrderByDescending(x=>x.Id);
if (!String.IsNullOrEmpty(searchString))
{
var words = searchString.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries).Select(x => x.ToLower()).ToArray();
var results = twts.Select(x => x)
.Where(x => words.Any(y => x.Message.ToLower().Contains(y)));
twts = results;
}
int pageSize = 10;
int pageNumber = (page ?? 1);
return View("Tweets", twts.ToPagedList(pageNumber, pageSize));
}
private void FollowUser()
{
var user_id = ConfigurationManager.AppSettings["twitterUserId"];
var user_name = ConfigurationManager.AppSettings["twitterUserName"];
var oauth_consumer_key = ConfigurationManager.AppSettings["oauth_consumer_key"];
var oauth_consumer_secret = ConfigurationManager.AppSettings["oauth_consumer_secret"];
var oauth_token = ConfigurationManager.AppSettings["oauth_token"];
var oauth_token_secret = ConfigurationManager.AppSettings["oauth_token_secret"];
var oauth_version = ConfigurationManager.AppSettings["oauth_version"];
var oauth_signature_method = ConfigurationManager.AppSettings["oauth_signature_method"];
var oauth_nonce = Convert.ToBase64String(
new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
var timeSpan = DateTime.UtcNow
- new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();
var resource_url = "https://stream.twitter.com/1.1/statuses/filter.json";
var follow = user_id;
var baseFormat = "follow={6}&oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
Uri.EscapeDataString(follow)
);
baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url), "&", Uri.EscapeDataString(baseString));
var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
"&", Uri.EscapeDataString(oauth_token_secret));
string oauth_signature;
using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
{
oauth_signature = Convert.ToBase64String(
hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
}
// create the request header
var headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
"oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
"oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
"oauth_version=\"{6}\"";
var authHeader = string.Format(headerFormat,
Uri.EscapeDataString(oauth_nonce),
Uri.EscapeDataString(oauth_signature_method),
Uri.EscapeDataString(oauth_timestamp),
Uri.EscapeDataString(oauth_consumer_key),
Uri.EscapeDataString(oauth_token),
Uri.EscapeDataString(oauth_signature),
Uri.EscapeDataString(oauth_version)
);
// run request
var postBody = "follow=" + Uri.EscapeDataString(follow);
resource_url += "?" + postBody;
streamRequest = (HttpWebRequest)WebRequest.Create(resource_url);
streamRequest.Headers.Add("Authorization", authHeader);
streamRequest.Method = "GET";
streamRequest.ContentType = "application/x-www-form-urlencoded";
streamRequest.BeginGetResponse(ar =>
{
var req = (WebRequest)ar.AsyncState;
using (var response = req.EndGetResponse(ar))
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
while (!reader.EndOfStream)
{
var data = reader.ReadLine();
if(!String.IsNullOrEmpty(data))
{
// new tweet received from Twitter API
var newTweet = JsonConvert.DeserializeObject<Tweet>(data);
using (var ctx = new TweetContext())
{
// save new tweet to database
newTweet.UserName = user_name;
newTweet.UserId = user_id;
DateTime dt = DateTime.ParseExact(newTweet.CreatedAt, "ddd MMM dd HH:mm:ss zzz yyyy", CultureInfo.InvariantCulture);
newTweet.CreatedAt = dt.ToString("yyyy-MM-dd HH:mm:ss");
ctx.Tweets.Add(newTweet);
ctx.SaveChanges();
}
// make TwitterReader web-site to refresh all connected users
Notify();
}
}
}
}
}, streamRequest);
}
private long GetOldTweets(long max_id)
{
var user_id = ConfigurationManager.AppSettings["twitterUserId"];
var user_name = ConfigurationManager.AppSettings["twitterUserName"];
var oauth_consumer_key = ConfigurationManager.AppSettings["oauth_consumer_key"];
var oauth_consumer_secret = ConfigurationManager.AppSettings["oauth_consumer_secret"];
var oauth_token = ConfigurationManager.AppSettings["oauth_token"];
var oauth_token_secret = ConfigurationManager.AppSettings["oauth_token_secret"];
var oauth_version = ConfigurationManager.AppSettings["oauth_version"];
var oauth_signature_method = ConfigurationManager.AppSettings["oauth_signature_method"];
var oauth_nonce = Convert.ToBase64String(
new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
var timeSpan = DateTime.UtcNow
- new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();
var resource_url = "https://api.twitter.com/1.1/statuses/user_timeline.json";
var baseFormat = "count={7}{8}&oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&screen_name={6}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
Uri.EscapeDataString(user_name),
200, //max allowed count of tweets in response per one Twitter API request
max_id > 0 ? "&max_id=" + max_id : ""
);
baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url), "&", Uri.EscapeDataString(baseString));
var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
"&", Uri.EscapeDataString(oauth_token_secret));
string oauth_signature;
using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
{
oauth_signature = Convert.ToBase64String(
hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
}
// create the request header
var headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
"oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
"oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
"oauth_version=\"{6}\"";
var authHeader = string.Format(headerFormat,
Uri.EscapeDataString(oauth_nonce),
Uri.EscapeDataString(oauth_signature_method),
Uri.EscapeDataString(oauth_timestamp),
Uri.EscapeDataString(oauth_consumer_key),
Uri.EscapeDataString(oauth_token),
Uri.EscapeDataString(oauth_signature),
Uri.EscapeDataString(oauth_version)
);
// run request
var postBody = "screen_name=" + Uri.EscapeDataString(user_name) + String.Format("&count={0}{1}", 200, max_id > 0 ? "&max_id=" + max_id : "");//
resource_url += "?" + postBody;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
request.Headers.Add("Authorization", authHeader);
request.Method = "GET";
request.ContentType = "application/x-www-form-urlencoded";
WebResponse response = request.GetResponse();
string responseData = new StreamReader(response.GetResponseStream()).ReadToEnd();
//receive bunch of 200 historical tweets
var tweets = JsonConvert.DeserializeObject<List<Tweet>>(responseData);
if (tweets.Count == 0)
return -1;
using (var ctx = new TweetContext())
{
// save historical tweets to db
foreach (var newTweet in tweets)
{
newTweet.UserName = user_name;
newTweet.UserId = user_id;
var entity = ctx.Tweets.FirstOrDefault(x => x.Id == newTweet.Id);
if (entity == null)
{
DateTime dt = DateTime.ParseExact(newTweet.CreatedAt, "ddd MMM dd HH:mm:ss zzz yyyy", CultureInfo.InvariantCulture);
newTweet.CreatedAt = dt.ToString("yyyy-MM-dd HH:mm:ss");
ctx.Tweets.Add(newTweet);
}
}
ctx.SaveChanges();
}
return tweets.Min(x => x.Id)-1;
}