C#异步服务器/客户端体系结构
第一篇关于堆栈溢出的帖子 不管怎么说,我正试图在业余时间自学网络编程,但我遇到了一个无法解决的难题。在玩了几天的同步网络方法之后,我决定制作一个客户机/服务器程序,它可以:C#异步服务器/客户端体系结构,c#,asynchronous,client,chat,C#,Asynchronous,Client,Chat,第一篇关于堆栈溢出的帖子 不管怎么说,我正试图在业余时间自学网络编程,但我遇到了一个无法解决的难题。在玩了几天的同步网络方法之后,我决定制作一个客户机/服务器程序,它可以: 处理多个并发连接 处理多个通信流 有真正的双向沟通 在更一般的层面上,我想制作一个聊天程序。到服务器的多个客户端连接可以单独发送和接收数据,没有问题……但也可以让服务器从每个客户端向其他客户端发送数据 现在我还没有达到我想要的程度,所以我来这里寻求一些指导。我似乎无法使我的循环正常工作,而且我确信这与代码的异步性质有关…
- 处理多个并发连接
- 处理多个通信流
- 有真正的双向沟通
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
// State object for reading client data asynchronously
public class StateObject
{
// Client socket.
public Socket workSocket = null;
// Size of receive buffer.
public const int BufferSize = 1024;
// Receive buffer.
public byte[] buffer = new byte[BufferSize];
// Received data string.
public StringBuilder sb = new StringBuilder();
}
public class AsynchronousSocketListener
{
// Thread signal.
public static ManualResetEvent allDone = new ManualResetEvent(false);
public AsynchronousSocketListener()
{
}
public static void StartListening()
{
// Data buffer for incoming data.
byte[] bytes = new Byte[1024];
// Establish the local endpoint for the socket.
// The DNS name of the computer
// running the listener is "host.contoso.com".
//IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
//IPAddress ipAddress = ipHostInfo.AddressList[0];
IPAddress ipAddress = System.Net.IPAddress.Loopback;
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 3000);
// Create a TCP/IP socket.
Socket listener = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
// Bind the socket to the local endpoint and listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
while (true)
{
// Set the event to nonsignaled state.
allDone.Reset();
// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
// Wait until a connection is made before continuing.
allDone.WaitOne();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
}
public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set();
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
// Retrieve the state object and the handler socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(
state.buffer, 0, bytesRead));
// Check for end-of-file tag. If it is not there, read
// more data.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
// All the data has been read from the
// client. Display it on the console.
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
content.Length, content);
// Echo the data back to the client.
Send(handler, content);
}
else
{
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
private static void Send(Socket handler, String data)
{
// Convert the string data to byte data using ASCII encoding.
byte[] byteData = Encoding.ASCII.GetBytes(data);
// Begin sending the data to the remote device.
handler.BeginSend(byteData, 0, byteData.Length, 0,
new AsyncCallback(SendCallback), handler);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket handler = (Socket)ar.AsyncState;
// Complete sending the data to the remote device.
int bytesSent = handler.EndSend(ar);
Console.WriteLine("Sent {0} bytes to client.", bytesSent);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public static int Main(String[] args)
{
StartListening();
return 0;
}
}
使用系统;
Net系统;
使用System.Net.Sockets;
使用系统文本;
使用系统线程;
//用于异步读取客户端数据的状态对象
公共类状态对象
{
//客户端套接字。
公共套接字工作组=null;
//接收缓冲区的大小。
public const int BufferSize=1024;
//接收缓冲区。
公共字节[]缓冲区=新字节[BufferSize];
//接收到的数据字符串。
公共StringBuilder sb=新StringBuilder();
}
公共类异步SocketListener
{
//线程信号。
public static ManualResetEvent allDone=新的ManualResetEvent(false);
公共异步SocketListener()
{
}
公共静态侦听()
{
//输入数据的数据缓冲区。
字节[]字节=新字节[1024];
//为套接字建立本地端点。
//计算机的DNS名称
//运行侦听器的是“host.contoso.com”。
//IPHostEntry ipHostInfo=Dns.Resolve(Dns.GetHostName());
//IPAddress IPAddress=ipHostInfo.AddressList[0];
IPAddress IPAddress=System.Net.IPAddress.Loopback;
IPEndPoint localEndPoint=新IPEndPoint(ipAddress,3000);
//创建TCP/IP套接字。
套接字侦听器=新套接字(AddressFamily.InterNetwork,
流,ProtocolType.Tcp);
//将套接字绑定到本地端点并侦听传入连接。
尝试
{
Bind(localEndPoint);
听,听(100);
while(true)
{
//将事件设置为非信号状态。
全部完成。重置();
//启动异步套接字以侦听连接。
Console.WriteLine(“等待连接…”);
listener.beginacept(
新建异步回调(AcceptCallback),
听众);
//等待连接完成后再继续。
全部完成。WaitOne();
}
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
Console.WriteLine(“\n按ENTER继续…”);
Console.Read();
}
公共静态无效接受回调(IAsyncResult ar)
{
//向主线程发出继续的信号。
allDone.Set();
//获取处理客户端请求的套接字。
套接字侦听器=(套接字)ar.AsyncState;
套接字处理程序=listener.EndAccept(ar);
//创建状态对象。
StateObject状态=新的StateObject();
state.workSocket=处理程序;
handler.BeginReceive(state.buffer,0,StateObject.BufferSize,0,
新的异步回调(ReadCallback),状态);
}
公共静态void ReadCallback(IAsyncResult ar)
{
String content=String.Empty;
//检索状态对象和处理程序套接字
//从异步状态对象。
StateObject状态=(StateObject)ar.AsyncState;
套接字处理程序=state.workSocket;
//从客户端套接字读取数据。
int bytesRead=handler.EndReceive(ar);
如果(字节读取>0)
{
//可能会有更多数据,因此请存储到目前为止收到的数据。
state.sb.Append(Encoding.ASCII.GetString(
state.buffer,0,bytesRead));
//检查文件结尾标记。如果不存在,请读取
//更多数据。
content=state.sb.ToString();
if(content.IndexOf(“”>-1)
{
//所有数据都已从数据库中读取
//客户端。在控制台上显示它。
WriteLine(“从套接字读取{0}字节。\n数据:{1}”,
内容、长度、内容);
//将数据回显到客户端。
发送(处理程序、内容);
}
其他的
{
//未收到所有数据。获取更多信息。
handler.BeginReceive(state.buffer,0,StateObject.BufferSize,0,
新的异步回调(ReadCallback),状态);
}
}
}
私有静态void发送(套接字处理程序、字符串数据)
{
//使用ASCII编码将字符串数据转换为字节数据。
byte[]byteData=Encoding.ASCII.GetBytes(数据);
//开始将数据发送到远程设备。
handler.BeginSend(byteData,0,byteData.Length,0,
新的异步回调(SendCallback),处理程序);
}
私有静态void SendCallback(IAsyncResult ar)
{
尝试
{
//从状态对象检索套接字。
套接字处理程序=(套接字)ar.AsyncState;
//完成将数据发送到远程设备。
int bytesSent=handler.EndSend(ar);
WriteLine(“发送{0}字节到客户端。”,bytesSent);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
捕获(例外e)
{
Console.WriteLine(如ToString());
}
}
公共静态int Main(字符串[]args)
{
惊人的倾听();
返回0;
}
}
Client.cs
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
public class StateObject
{
// Client socket.
public Socket workSocket = null;
// Size of receive buffer.
public const int BufferSize = 256;
// Receive buffer.
public byte[] buffer = new byte[BufferSize];
// Received data string.
public StringBuilder sb = new StringBuilder();
}
public class Program
{
public static ManualResetEvent connectDone = new ManualResetEvent(false);
public static ManualResetEvent sendDone = new ManualResetEvent(false);
public static ManualResetEvent receiveDone = new ManualResetEvent(false);
public static void Connect(EndPoint remoteEP, Socket client)
{
client.BeginConnect(remoteEP,
new AsyncCallback(ConnectCallback), client);
connectDone.WaitOne();
}
private static void ConnectCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket client = (Socket)ar.AsyncState;
// Complete the connection.
client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}",
client.RemoteEndPoint.ToString());
// Signal that the connection has been made.
connectDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void Send(Socket client, String data)
{
// Convert the string data to byte data using ASCII encoding.
byte[] byteData = Encoding.ASCII.GetBytes(data);
// Begin sending the data to the remote device.
client.BeginSend(byteData, 0, byteData.Length, SocketFlags.None,
new AsyncCallback(SendCallback), client);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket client = (Socket)ar.AsyncState;
// Complete sending the data to the remote device.
int bytesSent = client.EndSend(ar);
Console.WriteLine("Sent {0} bytes to server.", bytesSent);
// Signal that all bytes have been sent.
sendDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void Receive(Socket client)
{
try
{
// Create the state object.
StateObject state = new StateObject();
state.workSocket = client;
// Begin receiving the data from the remote device.
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void ReceiveCallback(IAsyncResult ar)
{
try
{
// Retrieve the state object and the client socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.workSocket;
// Read data from the remote device.
int bytesRead = client.EndReceive(ar);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
// Get the rest of the data.
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
else
{
// All the data has arrived; put it in response.
if (state.sb.Length > 1)
{
string response = state.sb.ToString();
Console.WriteLine(response);
}
// Signal that all bytes have been received.
receiveDone.Set();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
static void Main(string[] args)
{
IPAddress ipAddress = System.Net.IPAddress.Loopback;
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 3000);
Socket sock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
Connect(localEndPoint, sock);
string packet;
while (true)
{
packet = Console.ReadLine();
packet += "<EOF>";
Send(sock, packet);
Receive(sock);
connectDone.WaitOne();
}
}
}
使用系统;
Net系统;
使用System.Net.Sockets;
使用系统文本;
使用系统线程;
公共类状态对象
{
//客户端套接字。
公共套接字工作组=null;
//接收缓冲区的大小。
公共常数