I am getting an error “401 unauthorized” al the settings are fine in the https://dev.twitter.com/, any help it would be welcome thanks in advance! here is my code:
using System;
using System.IO;
using System.Net;
using System.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Security.Cryptography;
using oAuthTwitterWrapper.TwitterDatabaseDataSetTableAdapters;
using System.Globalization;
namespace oAuthTwitterWrapper
{
public class Utility2
{
public string ConsumerKey = "";
public string ConsumerKeySecret = "";
public string OauthToken = "";
public string OauthTokenSecret = "";
public string UserNameToBeFollowed = "";
public string strMessage = "";
public Utility2(String IdTwitter)
{
TwitterAccountsTableAdapter inputDB = new TwitterAccountsTableAdapter();
TwitterDatabaseDataSet.TwitterAccountsDataTable reponse = inputDB.GetDataByID(IdTwitter);
ConsumerKey = reponse[0].oAuthConsumerKey;
ConsumerKeySecret = reponse[0].oAuthConsumerSecret;
OauthToken = reponse[0].OauthToken.Trim();
OauthTokenSecret = reponse[0].OauthTokenSecret;
}
public string Generate_Nonce()
{
return new Random().Next(123400, int.MaxValue).ToString("X", CultureInfo.InvariantCulture);
}
public string Generate_TimeStamp()
{
return Convert.ToInt64((DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds, CultureInfo.CurrentCulture).ToString(CultureInfo.CurrentCulture);
}
public string EncodeString(string value)
{
if (value == null)
return null;
StringBuilder stringBuilder = new StringBuilder();
string str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~";
string str1 = value;
int num = 0;
int length = str1.Length;
while (num < length)
{
char chr = str1[num];
if (str.IndexOf(chr) == -1)
{
byte[] bytes = Encoding.UTF8.GetBytes(chr.ToString());
byte[] numArray = bytes;
for (int i = 0; i <= Convert.ToInt32(numArray.Length) - 1; i++)
{
byte num1 = numArray[i];
stringBuilder.AppendFormat("%{0:X2}", num1);
}
}
else
{
stringBuilder.Append(chr);
}
num += 1;
}
return stringBuilder.ToString();
}
private string GenerateHeader1()
{
return string.Concat("OAuth ",
string.Format("oauth_consumer_key=\"{0}\", ", EncodeString(ConsumerKey)),
string.Format("oauth_nonce=\"{0}\", ", EncodeString(Generate_Nonce())),
string.Format("oauth_signature=\"{0}\", ", EncodeString(this.GenerateSignature1())),
string.Format("oauth_signature_method=\"{0}\", ", EncodeString("HMAC-SHA1")),
string.Format("oauth_timestamp=\"{0}\", ", EncodeString(Generate_TimeStamp())),
string.Format("oauth_token=\"{0}\", ", EncodeString(OauthToken)),
string.Format("oauth_version=\"{0}\"", "1.0"));
}
private string GenerateSignature1()
{
string basestring = string.Concat(string.Format("&oauth_consumer_key={0}", ConsumerKey),
string.Format("&oauth_nonce={0}", Generate_Nonce()),
string.Format("&oauth_signature_method={0}", "HMAC-SHA1"),
string.Format("&oauth_timestamp={0}", Generate_TimeStamp()),
string.Format("&oauth_token={0}", OauthToken), "",
string.Format("&oauth_version={0}", "1.0"),
string.Format("&text={0}", strMessage),
string.Format("&screen_name={0}", UserNameToBeFollowed)
);
basestring = string.Concat("POST", "&", Uri.EscapeDataString("https://api.twitter.com/1.1/direct_messages/new.json"), "&", Uri.EscapeDataString(basestring.TrimStart('&')));
// Console.WriteLine(basestring);
string compositeString = string.Concat(EncodeString(ConsumerKeySecret), "&", EncodeString(OauthTokenSecret));
return Convert.ToBase64String((new System.Security.Cryptography.HMACSHA1(Encoding.ASCII.GetBytes(compositeString)).ComputeHash(Encoding.ASCII.GetBytes(basestring))));
}
public Boolean sendMessage()
{
Boolean responseSuccessful = false;
string postBody = string.Concat(string.Format("screen_name={0}", EncodeString(UserNameToBeFollowed)), "&", string.Format("text={0}", EncodeString(strMessage)));
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.twitter.com/1.1/direct_messages/new.json");
request.Headers.Add("Authorization", GenerateHeader1());
request.ContentType = "application/x-www-form-urlencoded";
request.ServicePoint.Expect100Continue = false;
request.MaximumAutomaticRedirections = 4;
request.MaximumResponseHeadersLength = 4;
request.Method = "POST";
try
{
using (System.IO.Stream stream = request.GetRequestStream())
{
byte[] content = ASCIIEncoding.ASCII.GetBytes(postBody);
stream.Write(content, 0, content.Length);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Close();
responseSuccessful = true;
}
catch (Exception ex)
{
// Console.WriteLine(ex.Message);
}
request = null;
return responseSuccessful;
}
}
}
