I get 401 when i tried to convert it for the stream api: "https://stream.twitter.com/1/statuses/filter.json". I will really appreciate any help. See code below:
HttpWebRequest request = null;
string oauth_consumer_key = "XXXXXXXXXXXXX";
string oauth_consumer_secret = "XXXXXXXXXXXXXXXX";
string oauth_token = "XXXXXXXXXXXXXXXXXXXXX";
string oauth_token_secret = "XXXXXXXXXXXXXXXXXXXXXXXXX";
string oauth_version = "1.0";
string oauth_signature_method = "HMAC-SHA1";
string oauth_nonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
TimeSpan timeSpan = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
string oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();
Encoding encoder = System.Text.Encoding.GetEncoding("utf-8");
int backOff = 250;
string line = string.Empty;
try
{
string parameters = this.GetQuery(template);
string baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}";
&track={6}"
string baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
Uri.EscapeDataString(parameters)
);
baseString = string.Concat("POST&", Uri.EscapeDataString(this.Datasource), "&", Uri.EscapeDataString(baseString));
string 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
string headerFormat = "OAuth oauth_consumer_key=\"{0}\", oauth_nonce=\"{1}\", " +
"oauth_signature=\"{2}\", oauth_signature_method=\"{3}\", " +
"oauth_timestamp=\"{4}\", " +
"oauth_token=\"{5}\", " +
"oauth_version=\"{6}\"";
string authHeader = string.Format(headerFormat,
Uri.EscapeDataString(oauth_consumer_key),
Uri.EscapeDataString(oauth_nonce),
Uri.EscapeDataString(oauth_signature),
Uri.EscapeDataString(oauth_signature_method),
Uri.EscapeDataString(oauth_timestamp),
Uri.EscapeDataString(oauth_token),
Uri.EscapeDataString(oauth_version)
);
ServicePointManager.Expect100Continue = false;
//string postBody = string.Format("track={0}", parameters);
string postBody = "track=" + Uri.EscapeDataString(parameters);
request = (HttpWebRequest)WebRequest.Create(this.Datasource + "?" + postBody);
request.Headers.Add("Authorization", authHeader);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.PreAuthenticate = true;
request.AllowWriteStreamBuffering = true;
using (WebResponse response = request.GetResponse())
{
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
string responseData = new StreamReader(response.GetResponseStream()).ReadToEnd();
//we successfully connected so reset the twitter backoff time
}
catch (WebException wex)
{
if (wex.Status == WebExceptionStatus.ProtocolError)
{
/* as per twitter api
*
* When a HTTP error (> 200) is returned, back off exponentially.
* Perhaps start with a 10 second wait, double on each subsequent failure,
* and finally cap the wait at 240 seconds.
*
* Exponential Backoff
*/
if (backOff < TwitterStreamProvider.InitialExponentialBackOff)
{
backOff = TwitterStreamProvider.InitialExponentialBackOff;
}
else
{
if (backOff < TwitterStreamProvider.MaxExponentialBackOff)
{
backOff *= TwitterStreamProvider.ExponentialBackOff;
}
}
}
else
{
/* as per twitter api
*
* When a network error (TCP/IP level) is encountered, back off linearly.
* Perhaps start at 250 milliseconds and cap at 16 seconds.
*
* Linear Backoff
*/
if (backOff < TwitterStreamProvider.MaxLinearBackOff)
{
backOff += TwitterStreamProvider.LinearBackOff;
}
}
Logger.Error(
string.Format("There was a problem trying to connect to the twitter stream. Will try to establish connection again in {0} milliseconds",
backOff),
wex);
}
catch (OperationCanceledException cex)
{
Logger.Error("Twitter stream thread was canceled", cex);
cancelled = true;
}
catch (Exception ex)
{
Logger.Error("There was a problem while scraping twitter.", ex);
Logger.Debug(string.Format("Last tweet before the error: {0}", line));
throw;
}
finally
{
if (request != null)
{
request.Abort();
request = null;
}
}
if (!cancelled)
{
System.Threading.Thread.Sleep(backOff);
}
}
}
/
Can you please point me into what am I doing wrong.
Thanks, Marta
