花了几天时间了解了SupperSocket工作原理，各各类之间的工作关系。SupperSocket大部资料网上都有，但写的都不适合初学者。
今天花点时间写下这几天的学习成果，一方面是为了将来更好的回顾知识点，另一方面想给初学者提供一份参考资料。考虑到笔功有限，
如果下面有什么信息不正确或写的不好，请大家多多包容！
首先我贴一简单的代码。后面我会详细的说明工作原理和他们之间如何调用！下面的代码我也是从网上找的，相当简单。
我今天主要是讲解下SupperSocket的理解！
public class TelnetServer : AppServer<TelnetSession>
{
protected override bool Setup(IRootConfig rootConfig, IServerConfig config)
{
return base.Setup(rootConfig, config);
}
protected override void OnStartup()
{
base.OnStartup();
}
protected override void OnStopped()
{
base.OnStopped();
}
} public class TelnetSession : AppSession<TelnetSession>
{
protected override void OnSessionStarted()
{
//this.Send("Welcome to SuperSocket Telnet Server\r\n");
byte[] bytes = Encoding.ASCII.GetBytes("Welcome\r\n to SuperSocket\r\n Telnet Server\r\n");
this.Send(bytes, 0, bytes.Length);
}
protected override void HandleUnknownRequest(StringRequestInfo requestInfo)
{
this.Send("Unknow request");
}
protected override void HandleException(Exception e)
{
this.Send("Application error: {0}", e.Message);
}
protected override void OnSessionClosed(CloseReason reason)
{
//add you logics which will be executed after the session is closed
base.OnSessionClosed(reason);
}
} public class ECHO : CommandBase<TelnetSession, StringRequestInfo>
{
public override void ExecuteCommand(TelnetSession session, StringRequestInfo requestInfo)
{
session.Send(requestInfo.Body);
}
} static void Main(string[] args)
{
Console.WriteLine("Press any key to start the server!");
Console.ReadKey();
Console.WriteLine();
var appServer = new TelnetServer();
//Setup the appServer
if (!appServer.Setup(2012)) //Setup with listening port
{
Console.WriteLine("Failed to setup!");
Console.ReadKey();
return;
}
Console.WriteLine();
//Try to start the appServer
if (!appServer.Start())
{
Console.WriteLine("Failed to start!");
Console.ReadKey();
return;
}
Console.WriteLine("The server started successfully, press key 'q' to stop it!");
while (Console.ReadKey().KeyChar != 'q')
{
Console.WriteLine();
continue;
}
//Stop the appServer
appServer.Stop();
Console.WriteLine("The server was stopped!");
Console.ReadKey();
} 服务端代码就上面四部分，看起来很简单吧，但是大家真的看懂了吗，他们的工作原理是怎样的。命令 ECHO 这个类根本没有构造对象，他是怎样运行的？你越看越疑惑吧！
后面我会说明。
我还是先把客户端代码贴出来。代码简化了，如果大家不知道EasyClietn 可以使用Nuget搜索SuperSocket.ClientEngine、SuperSocket.ProtoBase
因为版本有很多，大家最好是用Nuget
private void button1_Click(object sender, EventArgs e)
{
string strText = "add 1 1\r\n";
if (client != null && client.IsConnected )
{
Byte[] smk = new Byte[strText.Length];
for (int i = 0; i < strText.Length; i++)
{
Byte ss = Convert.ToByte(strText[i]);
smk[i] = ss;
}
byte[] b = Encoding.ASCII.GetBytes("ECHO 1 1\r\n");
client.Send(smk.ToArray()); //EasyClient<MyPackageInfo> client
}
} byte[] b = Encoding.ASCII.GetBytes("ECHO 1 1\r\n");
client.Send(smk.ToArray());
给服务端发送了二进制的“ECHO 1 1\r\n" ,在这里给大家一个问题，为什么后面要加\r\n 换行符。大家带着问题继续往下看。
现在给了大家两个问题？，现在我们来解决问题。
服务端是如何接收到消息。其它大家可以不要具体体解，因为SupperStocket封闭了TCP 和 UDP 层。
SuperSocket.SocketEngine.AsyncStreamSocketSession 这个类是工作最底运类
SupperSocket深入浅出（一） 从这个类可以知道数据的接收来源。
这个类是由
SuperSocket.SocketEngine.AsyncStreamSocketSession 《 SuperSocket.SocketEngine.AsyncSocketServer 《 SocketServerFactory 《 ProviderKey
《 ProviderFactoryInfo 《 AppDomainAppServer 《 DefaultBootstrap
这是最底层类，获取数据和发达送数据，这个大部分我们不要了解，因为这些都被AppSession封装起来了。 大家想了解的可以看下这个类。
class AsyncStreamSocketSession : SocketSession, IAsyncSocketSessionBase, INegotiateSocketSession
{
private byte[] m_ReadBuffer;
private int m_Offset;
private int m_Length;
private bool m_IsReset;
public AsyncStreamSocketSession(Socket client, SslProtocols security, SocketAsyncEventArgsProxy socketAsyncProxy)
: this(client, security, socketAsyncProxy, false)
{
}
public AsyncStreamSocketSession(Socket client, SslProtocols security, SocketAsyncEventArgsProxy socketAsyncProxy, bool isReset)
: base(client)
{
SecureProtocol = security;
SocketAsyncProxy = socketAsyncProxy;
var e = socketAsyncProxy.SocketEventArgs;
m_ReadBuffer = e.Buffer;
m_Offset = e.Offset;
m_Length = e.Count;
m_IsReset = isReset;
}
/// <summary>
/// Starts this session communication.
/// </summary>
public override void Start()
{
//Hasn't started, but already closed
if (IsClosed)
return;
OnSessionStarting();
}
private void OnSessionStarting()
{
try
{
OnReceiveStarted();
m_Stream.BeginRead(m_ReadBuffer, m_Offset, m_Length, OnStreamEndRead, m_Stream);
}
catch (Exception e)
{
LogError(e);
OnReceiveTerminated(CloseReason.SocketError);
return;
}
if (!m_IsReset)
StartSession();
}
private void OnStreamEndRead(IAsyncResult result)
{
var stream = result.AsyncState as Stream;
int thisRead = 0;
try
{
thisRead = stream.EndRead(result);
}
catch (Exception e)
{
LogError(e);
OnReceiveTerminated(CloseReason.SocketError);
return;
}
if (thisRead <= 0)
{
OnReceiveTerminated(CloseReason.ClientClosing);
return;
}
OnReceiveEnded();
int offsetDelta;
try
{
offsetDelta = AppSession.ProcessRequest(m_ReadBuffer, m_Offset, thisRead, true);
}
catch (Exception ex)
{
LogError("Protocol error", ex);
this.Close(CloseReason.ProtocolError);
return;
}
try
{
if (offsetDelta < 0 || offsetDelta >= Config.ReceiveBufferSize)
throw new ArgumentException(string.Format("Illigal offsetDelta: {0}", offsetDelta), "offsetDelta");
m_Offset = SocketAsyncProxy.OrigOffset + offsetDelta;
m_Length = Config.ReceiveBufferSize - offsetDelta;
OnReceiveStarted();
m_Stream.BeginRead(m_ReadBuffer, m_Offset, m_Length, OnStreamEndRead, m_Stream);
}
catch (Exception exc)
{
LogError(exc);
OnReceiveTerminated(CloseReason.SocketError);
return;
}
}
private Stream m_Stream;
private SslStream CreateSslStream(ICertificateConfig certConfig)
{
//Enable client certificate function only if ClientCertificateRequired is true in the configuration
if(!certConfig.ClientCertificateRequired)
return new SslStream(new NetworkStream(Client), false);
//Subscribe the client validation callback
return new SslStream(new NetworkStream(Client), false, ValidateClientCertificate);
}
private bool ValidateClientCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
var session = AppSession;
//Invoke the AppServer's method ValidateClientCertificate
var clientCertificateValidator = session.AppServer as IRemoteCertificateValidator;
if (clientCertificateValidator != null)
return clientCertificateValidator.Validate(session, sender, certificate, chain, sslPolicyErrors);
//Return the native validation result
return sslPolicyErrors == SslPolicyErrors.None;
}
private IAsyncResult BeginInitStream(AsyncCallback asyncCallback)
{
IAsyncResult result = null;
var certConfig = AppSession.Config.Certificate;
var secureProtocol = SecureProtocol;
switch (secureProtocol)
{
case (SslProtocols.None):
m_Stream = new NetworkStream(Client);
break;
case (SslProtocols.Default):
case (SslProtocols.Tls):
case (SslProtocols.Ssl3):
SslStream sslStream = CreateSslStream(certConfig);
result = sslStream.BeginAuthenticateAsServer(AppSession.AppServer.Certificate, certConfig.ClientCertificateRequired, SslProtocols.Default, false, asyncCallback, sslStream);
break;
case (SslProtocols.Ssl2):
SslStream ssl2Stream = CreateSslStream(certConfig);
result = ssl2Stream.BeginAuthenticateAsServer(AppSession.AppServer.Certificate, certConfig.ClientCertificateRequired, SslProtocols.Ssl2, false, asyncCallback, ssl2Stream);
break;
default:
var unknownSslStream = CreateSslStream(certConfig);
result = unknownSslStream.BeginAuthenticateAsServer(AppSession.AppServer.Certificate, certConfig.ClientCertificateRequired, secureProtocol, false, asyncCallback, unknownSslStream);
break;
}
return result;
}
private void OnBeginInitStreamOnSessionConnected(IAsyncResult result)
{
OnBeginInitStream(result, true);
}
private void OnBeginInitStream(IAsyncResult result)
{
OnBeginInitStream(result, false);
}
private void OnBeginInitStream(IAsyncResult result, bool connect)
{
var sslStream = result.AsyncState as SslStream;
try
{
sslStream.EndAuthenticateAsServer(result);
}
catch (IOException exc)
{
LogError(exc);
if (!connect)//Session was already registered
this.Close(CloseReason.SocketError);
OnNegotiateCompleted(false);
return;
}
catch (Exception e)
{
LogError(e);
if (!connect)//Session was already registered
this.Close(CloseReason.SocketError);
OnNegotiateCompleted(false);
return;
}
m_Stream = sslStream;
OnNegotiateCompleted(true);
}
protected override void SendSync(SendingQueue queue)
{
try
{
for (var i = 0; i < queue.Count; i++)
{
var item = queue[i];
m_Stream.Write(item.Array, item.Offset, item.Count);
}
OnSendingCompleted(queue);
}
catch (Exception e)
{
LogError(e);
OnSendError(queue, CloseReason.SocketError);
return;
}
}
protected override void OnSendingCompleted(SendingQueue queue)
{
try
{
m_Stream.Flush();
}
catch (Exception e)
{
LogError(e);
OnSendError(queue, CloseReason.SocketError);
return;
}
base.OnSendingCompleted(queue);
}
protected override void SendAsync(SendingQueue queue)
{
try
{
var item = queue[queue.Position];
m_Stream.BeginWrite(item.Array, item.Offset, item.Count, OnEndWrite, queue);
}
catch (Exception e)
{
LogError(e);
OnSendError(queue, CloseReason.SocketError);
}
}
private void OnEndWrite(IAsyncResult result)
{
var queue = result.AsyncState as SendingQueue;
try
{
m_Stream.EndWrite(result);
}
catch (Exception e)
{
LogError(e);
OnSendError(queue, CloseReason.SocketError);
return;
}
var nextPos = queue.Position + 1;
//Has more data to send
if (nextPos < queue.Count)
{
queue.Position = nextPos;
SendAsync(queue);
return;
}
OnSendingCompleted(queue);
}
public override void ApplySecureProtocol()
{
var asyncResult = BeginInitStream(OnBeginInitStream);
if (asyncResult != null)
asyncResult.AsyncWaitHandle.WaitOne();
}
public SocketAsyncEventArgsProxy SocketAsyncProxy { get; private set; }
ILog ILoggerProvider.Logger
{
get { return AppSession.Logger; }
}
public override int OrigReceiveOffset
{
get { return SocketAsyncProxy.OrigOffset; }
}
private bool m_NegotiateResult = false;
void INegotiateSocketSession.Negotiate()
{
IAsyncResult asyncResult;
try
{
asyncResult = BeginInitStream(OnBeginInitStreamOnSessionConnected);
}
catch (Exception e)
{
LogError(e);
OnNegotiateCompleted(false);
return;
}
if (asyncResult == null)
{
OnNegotiateCompleted(true);
return;
}
}
bool INegotiateSocketSession.Result
{
get { return m_NegotiateResult; }
}
private EventHandler m_NegotiateCompleted;
event EventHandler INegotiateSocketSession.NegotiateCompleted
{
add { m_NegotiateCompleted += value; }
remove { m_NegotiateCompleted -= value; }
}
private void OnNegotiateCompleted(bool negotiateResult)
{
m_NegotiateResult = negotiateResult;
//One time event handler
var handler = Interlocked.Exchange<EventHandler>(ref m_NegotiateCompleted, null);
if (handler == null)
return;
handler(this, EventArgs.Empty);
}
} View Code
SuperSocket.SocketEngine.AsyncStreamSocketSession 《 SuperSocket.SocketEngine.AsyncSocketServer 《 SocketServerFactory 《 AppServerBase
在SuperSocket.SocketBase.AppServerBase类里
private bool SetupSocketServer()
{
try
{
m_SocketServer = m_SocketServerFactory.CreateSocketServer<TRequestInfo>(this, m_Listeners, Config);
return m_SocketServer != null;
}
catch (Exception e)
{
if (Logger.IsErrorEnabled)
Logger.Error(e);
return false;
}
} #region IActiveConnector
/// <summary>
/// Connect the remote endpoint actively.
/// </summary>
/// <param name="targetEndPoint">The target end point.</param>
/// <param name="localEndPoint">The local end point.</param>
/// <returns></returns>
/// <exception cref="System.Exception">This server cannot support active connect.</exception>
Task<ActiveConnectResult> IActiveConnector.ActiveConnect(EndPoint targetEndPoint, EndPoint localEndPoint)
{
var activeConnector = m_SocketServer as IActiveConnector;
if (activeConnector == null)
throw new Exception("This server cannot support active connect.");
return activeConnector.ActiveConnect(targetEndPoint, localEndPoint);
}
/// <summary>
/// Connect the remote endpoint actively.
/// </summary>
/// <param name="targetEndPoint">The target end point.</param>
/// <returns></returns>
/// <exception cref="System.Exception">This server cannot support active connect.</exception>
Task<ActiveConnectResult> IActiveConnector.ActiveConnect(EndPoint targetEndPoint)
{
return ((IActiveConnector)this).ActiveConnect(targetEndPoint, null);
}
#endregion IActiveConnector private bool SetupSocketServer()
{
try
{
m_SocketServer = m_SocketServerFactory.CreateSocketServer<TRequestInfo>(this, m_Listeners, Config);
return m_SocketServer != null;
}
catch (Exception e)
{
if (Logger.IsErrorEnabled)
Logger.Error(e);
return false;
}
} private void SetupBasic(IRootConfig rootConfig, IServerConfig config, ISocketServerFactory socketServerFactory)
{
if (rootConfig == null)
throw new ArgumentNullException("rootConfig");
RootConfig = rootConfig;
if (config == null)
throw new ArgumentNullException("config");
if (!string.IsNullOrEmpty(config.Name))
m_Name = config.Name;
else
m_Name = string.Format("{0}-{1}", this.GetType().Name, Math.Abs(this.GetHashCode()));
Config = config;
SetDefaultCulture(rootConfig, config);
if (!m_ThreadPoolConfigured)
{
if (!TheadPoolEx.ResetThreadPool(rootConfig.MaxWorkingThreads >= 0 ? rootConfig.MaxWorkingThreads : new Nullable<int>(),
rootConfig.MaxCompletionPortThreads >= 0 ? rootConfig.MaxCompletionPortThreads : new Nullable<int>(),
rootConfig.MinWorkingThreads >= 0 ? rootConfig.MinWorkingThreads : new Nullable<int>(),
rootConfig.MinCompletionPortThreads >= 0 ? rootConfig.MinCompletionPortThreads : new Nullable<int>()))
{
throw new Exception("Failed to configure thread pool!");
}
m_ThreadPoolConfigured = true;
}
if (socketServerFactory == null)
{
var socketServerFactoryType =
Type.GetType("SuperSocket.SocketEngine.SocketServerFactory, SuperSocket.SocketEngine", true);
socketServerFactory = (ISocketServerFactory)Activator.CreateInstance(socketServerFactoryType);
}
m_SocketServerFactory = socketServerFactory;
//Read text encoding from the configuration
if (!string.IsNullOrEmpty(config.TextEncoding))
TextEncoding = Encoding.GetEncoding(config.TextEncoding);
else
TextEncoding = new ASCIIEncoding();
} 请天就写到这里了，看到这里你可以结合源码应该能知道SuperSocket是如何发送数据和接收数据。当前接收的数据还是停留在
TCP UDP层面上。下一稿将说明应用动，协议和命令是怎样工作。
以上只是个人想法和实践经验所得，如果有文字错误和语法错误，请加以指点！
QQ：247039968
emil:[email protected]
无论是美女的歌声，还是鬣狗的狂吠，无论是鳄鱼的眼泪，还是恶狼的嚎叫，都不会使我动摇