登錄Facebook時遇到問題

剛開始使用facebook c＃sdk的v6構建應用程序，並停留在facebook的登錄過程中。我的頁面中有以下代碼：登錄Facebook時遇到問題

string client_id = ConfigurationManager.AppSettings["APIKey"].ToString(); 
    string client_secret = ConfigurationManager.AppSettings["Secret"].ToString(); 
    string redirect_uri = ConfigurationManager.AppSettings["Url"].ToString() + "default2.aspx"; 

    FacebookClient objClient = new FacebookClient(); 

    var fbLoginUrl = objClient.GetLoginUrl(new { client_id = client_id, 
               client_secret = client_secret, 
               redirect_uri = redirect_uri, 
               response_type = "code", 
               display = "popup", 
               scope = "manage_pages,publish_stream,read_stream", 
               state = "" }); 
    //msg.Text = fbLoginUrl.ToString(); 
    Response.Redirect(fbLoginUrl.ToString());

當我轉到頁面時，登錄的重定向從不發生。我究竟做錯了什麼？

來源

2012-03-27 Jess

重定向到fbLoginUrl.AbsoluteUri – prabir 2012-03-28 20:20:02

謝謝@prabir稍後會試一試。整天都在跑步。 – Jess 2012-03-29 00:41:28

使用MVC 3（查看已發佈的示例），我創建了一個視圖，其中登錄開始。控制器是：

 public ActionResult Logon() 
    { 
     _fb = new FacebookClient(); 

     var csrfToken = Guid.NewGuid().ToString(); 
     Session["fb_csrf_token"] = csrfToken; 

     var state = Convert.ToBase64String(Encoding.UTF8.GetBytes(_fb.SerializeJson(new { returnUrl = returnUrl, csrf = csrfToken }))); 

     var fbLoginUrl = _fb.GetLoginUrl(
      new 
      { 
       client_id = AppId, 
       client_secret = Appsecret, 
       redirect_uri = RedirectUri, 
       response_type = "code", 
       scope = Scope, 
       state = state 
      }); 
     return Redirect(fbLoginUrl.AbsoluteUri); 
    }

其中RETURNURL是在我的應用程序（/家/ fbhome）所連接的觀看區域和RedirectUri是將涉及第二步驟中的視圖（loginresult）：

 public ActionResult Loginresult(string code, string state) 
    { 
     if (string.IsNullOrWhiteSpace(code) || string.IsNullOrWhiteSpace(state)) 
      return RedirectToAction("Index", "Home"); 

     // first validate the csrf token 
     _fb = new FacebookClient(); 
     dynamic decodedState; 
     try 
     { 
      decodedState = _fb.DeserializeJson(Encoding.UTF8.GetString(Convert.FromBase64String(state)), null); 
      var exepectedCsrfToken = Session["fb_csrf_token"] as string; 
      // make the fb_csrf_token invalid 
      Session["fb_csrf_token"] = null; 

      if (!(decodedState is IDictionary<string, object>) || !decodedState.ContainsKey("csrf") || string.IsNullOrWhiteSpace(exepectedCsrfToken) || exepectedCsrfToken != decodedState.csrf) 
      { 
       return RedirectToAction("Index", "Home"); 
      } 
     } 
     catch 
     { 
      // log exception 
      return RedirectToAction("Index", "Home"); 
     } 

     try 
     { 
      dynamic result = _fb.Post("oauth/access_token", 
             new 
             { 
              client_id = AppId, 
              client_secret = Appsecret, 
              redirect_uri = RedirectUri, 
              code = code 
             }); 

      Session["fb_access_token"] = result.access_token; 

      if (result.ContainsKey("expires")) 
       Session["fb_expires_in"] = DateTime.Now.AddSeconds(result.expires); 

      if (decodedState.ContainsKey("returnUrl")) 
      { 
       if (Url.IsLocalUrl(decodedState.returnUrl)) 
        return Redirect(decodedState.returnUrl); 
       return Redirect(decodedState.returnUrl + "/notlocal"); 
      } 

      return RedirectToAction("Index", "Home"); 
     } 
     catch 
     { 
      // log exception 
      return RedirectToAction("Index", "Home"); 
     } 
    }

所以，據我瞭解，用戶進入網站（/ home/index），然後點擊鏈接（/ home/loggon），facebook答案（/ home/loginresult），用戶被重定向到/ home/fbhome

希望這可以幫到

對不起，我的英語！

來源

2012-03-29 08:24:42 Netah

登錄Facebook時遇到問題

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