public static AccessToken GetFacebookApplicationToken()
{
string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&client_secret={1}&grant_type=client_credentials",
FacebookSettings.Settings.ClientId,
FacebookSettings.Settings.AppSecret);
WebClient wc = new WebClient();
string tokenResponse = "";
try
{
tokenResponse = wc.DownloadString(url);
Regex rx = new Regex("^access_token=([\\w\\W]+)$");
Match match = rx.Match(tokenResponse);
if (match.Groups.Count >= 2)
{
AccessToken token = new AccessToken { Token = match.Groups[1].Value };
return token;
}
else
return null;
}
catch (System.Net.WebException wex)
{
StreamReader sr = new StreamReader(wex.Response.GetResponseStream());
string response = sr.ReadToEnd();
sr.Close();
sr.Dispose();
//throw new Exception(response);
throw new FacebookException("AuthException", response, wex);
}
}
public static AccessToken GetFacebookAccessToken(string code)
{
string getTokenUrl = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&client_secret={2}&code={3}",
FacebookSettings.Settings.ClientId,
FacebookSettings.Settings.RedirectUri,
FacebookSettings.Settings.AppSecret,
code);
WebClient wc = new WebClient();
string tokenResponse = "";
try
{
tokenResponse = wc.DownloadString(getTokenUrl);
Regex rx = new Regex("^access_token=(\\w+)&expires=(\\d+)$");
Match match = rx.Match(tokenResponse);
if (match.Groups.Count >= 3)
{
AccessToken token = new AccessToken { Token = match.Groups[1].Value, Expires = Convert.ToInt64(match.Groups[2].Value) };
return token;
}
else
return null;
}
catch (System.Net.WebException wex)
{
string response = "";
if (wex.Response != null)
{
StreamReader sr = new StreamReader(wex.Response.GetResponseStream());
response = sr.ReadToEnd();
sr.Close();
sr.Dispose();
}
//throw new Exception(response);
throw new FacebookException("AuthException", response, wex);
}
catch (Exception ex)
{
throw new FacebookException("AuthException", tokenResponse, ex);
}
}