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在开发自己的苹果推送服务时候，要合理的控制ios设备的Token,而这个Token是由苹果服务器Apns产生的，就是每次app问Apns要Token，由苹果服务器产生的Token会记录到Apns里面，我们需要根据该Token进行制定设备的消息推送，所有Token需要我们自己去记录和管理，每个设备对应唯一的Token,而app的用户登录会有自己约束的别名，与该tokne进行关系绑定，这样按该别名进行推送，就可以找到对应的Token，进而推送到该iso设备上，对应失效的Token我们需要访问苹果的feedbackServer,拿取失效的Token，然后把本地记录的失效token进行移除。
注意事项：
1.建议和feedback服务器建立长连接，连接过于频繁有可能被当做攻击(简简单单的做一些测试时没有关系的);所有在实际开发完成后，我们基本上可以半天与feedback服务器建立一次socket连接，拿取失效的token,
2.获取的token是在上次你给你的应用发推送失败时加feedback服务的，里面会返回失败的具体时间.
3.返回的数据由三部分组成，请看下面的图：
构中包含三个部分，第一部分是一个上次发推送失败的时间戳，第二个部分是device_token的长度，第三部分就是失效的device_token
贴下PushSharp中连接feedback的代码
1 /// <summary> 2 /// FeedbackService 3 /// </summary> 4 public class FeedbackService 5 { 6 public FeedbackService(ApnsConfiguration configuration) 7 { 8 Configuration = configuration; 9 } 10 11 public ApnsConfiguration Configuration { get; private set; } 12 13 public delegate void FeedbackReceivedDelegate(string deviceToken, DateTime timestamp); 14 public event FeedbackReceivedDelegate FeedbackReceived; 15 16 public void Check() 17 { 18 var encoding = Encoding.ASCII; 19 20 var certificate = Configuration.Certificate; 21 22 var certificates = new X509CertificateCollection(); 23 certificates.Add(certificate); 24 25 var client = new TcpClient(Configuration.FeedbackHost, Configuration.FeedbackPort); 26 27 var stream = new SslStream(client.GetStream(), true, 28 (sender, cert, chain, sslErrs) => { return true; }, 29 (sender, targetHost, localCerts, remoteCert, acceptableIssuers) => { return certificate; }); 30 31 stream.AuthenticateAsClient(Configuration.FeedbackHost, certificates, System.Security.Authentication.SslProtocols.Tls, false); 32 33 34 //Set up 35 byte[] buffer = new byte[4096]; 36 int recd = 0; 37 var data = new List<byte>(); 38 39 //Get the first feedback 40 recd = stream.Read(buffer, 0, buffer.Length); 41 42 //Continue while we have results and are not disposing 43 while (recd > 0) 44 { 45 // Add the received data to a list buffer to work with (easier to manipulate) 46 for (int i = 0; i < recd; i++) 47 data.Add(buffer[i]); 48 49 //Process each complete notification "packet" available in the buffer 50 while (data.Count >= (4 + 2 + 32)) // Minimum size for a valid packet 51 { 52 var secondsBuffer = data.GetRange(0, 4).ToArray(); 53 var tokenLengthBuffer = data.GetRange(4, 2).ToArray(); 54 55 // Get our seconds since epoch 56 // Check endianness and reverse if needed 57 if (BitConverter.IsLittleEndian) 58 Array.Reverse(secondsBuffer); 59 var seconds = BitConverter.ToInt32(secondsBuffer, 0); 60 61 //Add seconds since 1970 to that date, in UTC 62 var timestamp = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(seconds); 63 64 //flag to allow feedback times in UTC or local, but default is local 65 if (!Configuration.FeedbackTimeIsUTC) 66 timestamp = timestamp.ToLocalTime(); 67 68 69 if (BitConverter.IsLittleEndian) 70 Array.Reverse(tokenLengthBuffer); 71 var tokenLength = BitConverter.ToInt16(tokenLengthBuffer, 0); 72 73 if (data.Count >= 4 + 2 + tokenLength) 74 { 75 76 var tokenBuffer = data.GetRange(6, tokenLength).ToArray(); 77 // Strings shouldn‘t care about endian-ness... this shouldn‘t be reversed 78 //if (BitConverter.IsLittleEndian) 79 // Array.Reverse (tokenBuffer); 80 var token = BitConverter.ToString(tokenBuffer).Replace("-", "").ToLower().Trim(); 81 82 // Remove what we parsed from the buffer 83 data.RemoveRange(0, 4 + 2 + tokenLength); 84 85 // Raise the event to the consumer 86 var evt = FeedbackReceived; 87 if (evt != null) 88 evt(token, timestamp); 89 } 90 else 91 { 92 continue; 93 } 94 95 } 96 97 //Read the next feedback 98 recd = stream.Read(buffer, 0, buffer.Length); 99 } 100 101 try 102 { 103 stream.Close(); 104 stream.Dispose(); 105 } 106 catch { } 107 108 try 109 { 110 client.Client.Shutdown(SocketShutdown.Both); 111 client.Client.Dispose(); 112 } 113 catch { } 114 115 try { client.Close(); } 116 catch { } 117 } 118 }
下面是处理逻辑：
1 /// <summary> 2 /// 处理失效的Token逻辑信息 3 /// </summary> 4 public class TokenProvider 5 { 6 private FeedbackService fs = null; 7 private int hour = 12; 8 private string CID; 9 10 public TokenProvider(ApnsConfiguration cf, string CID) 11 { 12 this.fs = fs = new FeedbackService(cf); 13 this.CID = CID; 14 try 15 { 16 int hour = int.Parse(ConfigurationManager.AppSettings["ManagerTokenHour"]);//Token的控制时间 17 } 18 catch { hour = 12; } 19 } 20 21 /// <summary> 22 /// 开启处理失效的Token逻辑信息 23 /// </summary> 24 /// <param name="cf"></param> 25 public void Init() 26 { 27 try 28 { 29 Thread thsub = new Thread(new ThreadStart(() => 30 { 31 while (true) 32 { 33 try 34 { 35 fs.Check(); 36 } 37 catch (Exception ex) 38 { 39 LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = " fs.Check() Error! CID=" + CID, ExInfo = ex }); 40 } 41 Thread.Sleep(hour * 60 * 60 * 1000); 42 } 43 })); 44 fs.FeedbackReceived += fs_FeedbackReceived; 45 thsub.Start(); 46 LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = "Open TokenProvider! CID=" + CID }); 47 } 48 catch (Exception ex) 49 { LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = " Open TokenProvider Error! CID=" + CID, ExInfo = ex }); } 50 } 51 52 /// <summary> 53 /// 处理失效的Token信息 54 /// </summary> 55 /// <param name="deviceToken"></param> 56 /// <param name="timestamp"></param> 57 private void fs_FeedbackReceived(string deviceToken, DateTime timestamp) 58 { 59 try 60 { 61 p_DeleteToken p = new p_DeleteToken(deviceToken); 62 if (p.ExecutionDelete()) { 63 LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = "Delete lose token success >> " + deviceToken }); 64 } else { 65 LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = "Delete lose token error >> " + deviceToken, ExInfo = null }); 66 }; 67 } 68 catch (Exception ex) 69 { 70 LogInfoProvider.config.Logs.Add(new LogClass() { LogStr = "fs_FeedbackReceived Error! CID=" + CID, ExInfo = ex }); 71 } 72 } 73 }
从苹果apns的feedback服务器获取推送失败的token
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原文地址：http://www.cnblogs.com/heyangyi/p/5698808.html
