整合Facebook聊天

我已经编写了一个程序来集成在C＃中的Facebook用户聊天，但是在发送之后我总是得到响应服务器。

我检查了API密钥和App秘密，两者都是正确的。 看起来我将一些错误的参数传递给服务器。

这是我的代码。

 private void GetDetailsButton_Click(object sender, EventArgs e) { TcpClient FacebookClient = new TcpClient(); FacebookClient.Connect("chat.facebook.com", 5222); NetworkStream myns = FacebookClient.GetStream(); string xml = "" + ""; StreamWriter mySw = new StreamWriter(myns); mySw.WriteLine(xml); //sending initial request mySw.Flush(); byte[] serverResponseByte = new byte[1024]; int myBytesRead = 0; StringBuilder myResponseAsSB = new StringBuilder(); //reading response from the server to see the supported authentication methods do { myBytesRead = myns.Read(serverResponseByte, 0, serverResponseByte.Length); myResponseAsSB.Append(System.Text.Encoding.UTF8.GetString(serverResponseByte, 0, myBytesRead)); } while (myns.DataAvailable); myResponseAsSB.Clear(); xml = ""; mySw.WriteLine(xml); mySw.Flush(); //sending response to server to use X-FACEBOOK-PLATFORM //reading challenge send by the server do { myBytesRead = myns.Read(serverResponseByte, 0, serverResponseByte.Length); myResponseAsSB.Append(System.Text.Encoding.UTF8.GetString(serverResponseByte, 0, myBytesRead)); } while (myns.DataAvailable); myResponseAsSB.Replace("", ""); myResponseAsSB.Replace("", ""); //converting challenge string to normal string byte[] myregularstrigbytes = Convert.FromBase64String(myResponseAsSB.ToString()); string myregularstring = System.Text.Encoding.UTF8.GetString(myregularstrigbytes); //I've hardcoded the accesstoken here for testing purpose. string SessionKey = AccessToken.Split('|')[1]; string response = ComposeResponse(myregularstring); byte[] myResponseByte = Encoding.UTF8.GetBytes(response.ToString()); string myEncodedResponseToSend = Convert.ToBase64String(myResponseByte); xml = String.Format("{0}", myEncodedResponseToSend); mySw.WriteLine(xml); mySw.Flush(); //sending the response to the server with my parameters myResponseAsSB.Clear(); //checking if authentication succeed do { myBytesRead = myns.Read(serverResponseByte, 0, serverResponseByte.Length); myResponseAsSB.Append(System.Text.Encoding.UTF8.GetString(serverResponseByte, 0, myBytesRead)); } while (myns.DataAvailable); MessageBox.Show(myResponseAsSB.ToString()); } private string ComposeResponse(string serverresponse) { string version = serverresponse.Split('&')[0].Split('=')[1]; string method = serverresponse.Split('&')[1].Split('=')[1]; string nonce = serverresponse.Split('&')[2].Split('=')[1]; string SessionKey = AccessToken.Split('|')[1]; long callId = (long)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds; string sig = "api_key=" + appId + "call_id=" + callId + "method=" + method + "nonce=" + nonce + "session_key=" + SessionKey + "v=" + "1.0" + AppSecret; MD5 md = MD5.Create(); var hash = md.ComputeHash(Encoding.UTF8.GetBytes(sig)); sig = hash.Aggregate("", (current, b) => current + b.ToString("x2")); return "api_key=" + HttpUtility.UrlEncode(appId) + "&call_id=" + HttpUtility.UrlEncode(callId) + "&method=" + HttpUtility.UrlEncode(method) + "&nonce=" + HttpUtility.UrlEncode(nonce) + "&session_key=" + HttpUtility.UrlEncode(SessionKey) + "&v=" + HttpUtility.UrlEncode("1.0") + "&sig=" + HttpUtility.UrlEncode(sig); } 

我在C＃和X-FACEBOOK-PLATFORM中评论了这篇文章Facebook Chat Authentication ，我的应用程序类型是Native / Desktop。

有人能指出我正确的方向吗？

编辑：我认为问题是在创建签名时，有没有办法validation创建的签名？

编辑1：根据此SO答案 ，访问令牌包含第一个|之后的会话密钥 性格，我可以找到| 直到2天前的角色，但现在我找不到| 访问令牌中的字符，它真的很奇怪，所以我现在如何找到会话密钥？ （或者我现在应该去睡觉了。）

编辑2：奇怪的是我总是以||获得本机/桌面应用程序的访问令牌。 我进一步搜索并发现会话密钥需要从auth.promoteSession遗留API中提取，并使用HttpUtility.UrlEncode而不是HttpUtility.HtmlEncode对参数进行编码。

现在我已经硬编码了Access令牌（在访问令牌调试器中validation了它），会话密钥，App密钥和app秘密仍然得到相同的错误

编辑3：我一直在敲打我的头一个星期仍然这不起作用，但今天我发现文档中的更新Note that this needs to be over TLS (Transport Layer Security) or you'll get an error. 我想我需要相应地修改我的代码。

编辑4：我已经尝试了文档中的代码，发现$SESSION_XML的值应该是

 $SESSION_XML = ''. ''; 

转换完后，我会发布C＃代码。

 string sig = "api_key=" + appId + "call_id=" + callId + "method=" + method + "nonce=" + nonce + "session_key=" + SessionKey + "v=1.0" + APP_SECRET; MD5 md = MD5.Create(); var hash = md.ComputeHash(Encoding.UTF8.GetBytes(sig)); sig = hash.Aggregate("", (current, b) => current + b.ToString("x2")); var response = "api_key=" + appId + "&call_id=" + callId + "&method=" + method + "&nonce=" + nonce + "&session_key=" + SessionKey + "&v=1.0"; // response & signature response = string.Concat(Uri.EscapeDataString(response), "&", Uri.EscapeDataString(sig)) // base64 encode var myEncodedResponseToSend = Convert.ToBase64String( ASCIIEncoding.ASCII.GetBytes(response));