Hi,
I just want to Add twitter login authentication to website in asp.net in my website.
here is a code which i did for that.
here is a code which i did for that.
using System;
using System.Collections.Specialized;
using System.Configuration;
using System.IO;
using System.Net;
using System.Web;
namespace oAuthExample
{
public class oAuthTwitter : OAuthBase
{
#region Method enum
public enum Method
{
GET,
POST,
DELETE
} ;
#endregion
public const string REQUEST_TOKEN = "http://api.twitter.com/oauth/request_token";
public const string AUTHORIZE = "https://api.twitter.com/oauth/access_token";
public const string ACCESS_TOKEN = "http://twitter.com/oauth/access_token";
private string _callBackUrl = "oob";
private string _consumerKey = "";
private string _consumerSecret = "";
private string _oauthVerifier = "";
private string _token = "";
private string _tokenSecret = "";
#region Properties
public string ConsumerKey
{
get
{
if (_consumerKey.Length == 0)
{
_consumerKey = ConfigurationManager.AppSettings["consumerKey"];
}
return _consumerKey;
}
set { _consumerKey = value; }
}
public string ConsumerSecret
{
get
{
if (_consumerSecret.Length == 0)
{
_consumerSecret = ConfigurationManager.AppSettings["consumerSecret"];
}
return _consumerSecret;
}
set { _consumerSecret = value; }
}
public string Token
{
get { return _token; }
set { _token = value; }
}
public string TokenSecret
{
get { return _tokenSecret; }
set { _tokenSecret = value; }
}
public string CallBackUrl
{
get { return _callBackUrl; }
set { _callBackUrl = value; }
}
public string OAuthVerifier
{
get { return _oauthVerifier; }
set { _oauthVerifier = value; }
}
#endregion
///
/// Get the link to Twitter's authorization page for this application.
///
/// The url with a valid request token, or a null string.
public string AuthorizationLinkGet()
{
string ret = null;
string response = oAuthWebRequest(Method.GET, REQUEST_TOKEN, String.Empty);
if (response.Length > 0)
{
//response contains token and token secret. We only need the token.
NameValueCollection qs = HttpUtility.ParseQueryString(response);
if (qs["oauth_callback_confirmed"] != null)
{
if (qs["oauth_callback_confirmed"] != "true")
{
throw new Exception("OAuth callback not confirmed.");
}
}
if (qs["oauth_token"] != null)
{
ret = AUTHORIZE + "?oauth_token=" + qs["oauth_token"];
}
}
return ret;
}
///
/// Exchange the request token for an access token.
///
/// The oauth_token is supplied by Twitter's authorization page following the callback.
/// An oauth_verifier parameter is provided to the client either in the pre-configured callback URL
public void AccessTokenGet(string authToken, string oauthVerifier)
{
Token = authToken;
OAuthVerifier = oauthVerifier;
string response = oAuthWebRequest(Method.GET, ACCESS_TOKEN, String.Empty);
if (response.Length > 0)
{
//Store the Token and Token Secret
NameValueCollection qs = HttpUtility.ParseQueryString(response);
if (qs["oauth_token"] != null)
{
Token = qs["oauth_token"];
}
if (qs["oauth_token_secret"] != null)
{
TokenSecret = qs["oauth_token_secret"];
}
}
}
///
/// Submit a web request using oAuth.
///
/// GET or POST
/// The full url, including the querystring.
/// Data to post (querystring format)
/// The web server response.
public string oAuthWebRequest(Method method, string url, string postData)
{
string outUrl = "";
string querystring = "";
string ret = "";
//Setup postData for signing.
//Add the postData to the querystring.
if (method == Method.POST || method == Method.DELETE)
{
if (postData.Length > 0)
{
//Decode the parameters and re-encode using the oAuth UrlEncode method.
NameValueCollection qs = HttpUtility.ParseQueryString(postData);
postData = "";
foreach (string key in qs.AllKeys)
{
if (postData.Length > 0)
{
postData += "&";
}
qs[key] = HttpUtility.UrlDecode(qs[key]);
qs[key] = UrlEncode(qs[key]);
postData += key + "=" + qs[key];
}
if (url.IndexOf("?") > 0)
{
url += "&";
}
else
{
url += "?";
}
url += postData;
}
}
var uri = new Uri(url);
string nonce = GenerateNonce();
string timeStamp = GenerateTimeStamp();
//Generate Signature
string sig = GenerateSignature(uri,
ConsumerKey,
ConsumerSecret,
Token,
TokenSecret,
CallBackUrl,
OAuthVerifier,
method.ToString(),
timeStamp,
nonce,
out outUrl,
out querystring);
querystring += "&oauth_signature=" + UrlEncode(sig);
//Convert the querystring to postData
if (method == Method.POST || method == Method.DELETE)
{
postData = querystring;
querystring = "";
}
if (querystring.Length > 0)
{
outUrl += "?";
}
ret = WebRequest(method, outUrl + querystring, postData);
return ret;
}
///
/// Web Request Wrapper
///
/// Http Method
/// Full url to the web resource
/// Data to post in querystring format
/// The web server response.
public string WebRequest(Method method, string url, string postData)
{
HttpWebRequest webRequest = null;
StreamWriter requestWriter = null;
string responseData = "";
webRequest = System.Net.WebRequest.Create(url) as HttpWebRequest;
webRequest.Method = method.ToString();
webRequest.ServicePoint.Expect100Continue = false;
//webRequest.UserAgent = "Identify your application please.";
//webRequest.Timeout = 20000;
if (method == Method.POST || method == Method.DELETE)
{
webRequest.ContentType = "application/x-www-form-urlencoded";
//POST the data.
requestWriter = new StreamWriter(webRequest.GetRequestStream());
try
{
requestWriter.Write(postData);
}
catch
{
throw;
}
finally
{
requestWriter.Close();
requestWriter = null;
}
}
responseData = WebResponseGet(webRequest);
webRequest = null;
return responseData;
}
///
/// Process the web response.
///
/// The request object.
/// The response data.
public string WebResponseGet(HttpWebRequest webRequest)
{
StreamReader responseReader = null;
string responseData = "";
try
{
responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
responseData = responseReader.ReadToEnd();
}
catch
{
throw;
}
finally
{
webRequest.GetResponse().GetResponseStream().Close();
responseReader.Close();
responseReader = null;
}
return responseData;
}
}
}
its giving me The remote server returned an error: (403) Forbidden.
Umesh KumarPosted May 28, 2014, 11:03 AM