我一直在编写一个由两部分组成的聊天程序：服务器和客户端。服务器用于TcpListener监听传入请求以加入服务器，客户端使用TcpClient它连接到服务器并发送消息。到目前为止，我的握手是客户端连接时发送的第一条消息——它包含客户端的 IP 地址和昵称集。我不知道如何让服务器异步侦听，因为如果它不是异步的，那么聊天将是client -> server -> client -> server而它需要一次连接到多个客户端，并一次接收多条消息。到目前为止，我的代码是同步编写的：
客户端：
public void StartClient(string serverIP)
{
ReadWrite rw = new ReadWrite();
string nick = rw.GetNick();
string handshakeContents = "HANDSHAKE:" + nick + ":" + GetIP();
Int32 serverPort = 1336; // yay
TcpClient client = new TcpClient(serverIP, serverPort);
Console.WriteLine("Sending initial handshake: {0}", handshakeContents);
Byte[] data = System.Text.Encoding.ASCII.GetBytes(handshakeContents); // Convert handshakeContents to Byte[]
NetworkStream stream = client.GetStream(); // Instantiate object "stream" for use in read/write
stream.Write(data, 0, data.Length); // Send handshakeContents in Byte[] to server
Console.WriteLine(" - Connecting to IlanChat Server on ip {0}", serverIP);
Thread.Sleep(1000); // sleep 1s
data = new Byte[256];
string responseHandshake = String.Empty; // response handshake from server
Int32 bytes = stream.Read(data, 0, data.Length); // Read handshake.
responseHandshake = System.Text.Encoding.ASCII.GetString(data, 0, bytes); // Decode from Byte[] to ASCII string
Console.WriteLine(" - Received response handshake: {0}", responseHandshake);
Console.WriteLine(" - Successfully connected to IlanChat server on IP {0}", serverIP); // display message
Thread.Sleep(2000);
Console.Clear();
List<string> messagesRecieved = new List<string>();
while(true)
{
Console.Clear();
foreach (string msg in messagesRecieved)
{
Console.WriteLine(msg);
}
Console.WriteLine();
Console.Write("Enter message: ");
string msgRaw = Console.ReadLine();
string sendMsg = nick + ": " + msgRaw;
data = new Byte[256];
data = System.Text.Encoding.ASCII.GetBytes(sendMsg);
stream.Write(data, 0, data.Length); // finish this async shit
}
}
服务器：
List<string> clientIP = new List<string>();
List<string> clientNicks = new List<string>();
string responseHandshake = "hello";
Int32 serverPort = 1336;
IPAddress machineIP = IPAddress.Parse(GetIP());
Console.Clear();
Console.WriteLine(" - Starting IlanChat server on IP {0}", machineIP);
TcpListener server = null;
server = new TcpListener(machineIP, serverPort);
server.Start();
Byte[] buffer = new Byte[256];
String data = null;
Console.WriteLine("Successfully started IlanChat server!");
while (true) // first alpha - only one user at a time
{
Console.WriteLine();
Console.WriteLine("Waiting for connections..");
TcpClient client = server.AcceptTcpClient();
Console.WriteLine("User connecting..");
Console.WriteLine("Receiving handshake data..");
data = null;
NetworkStream stream = client.GetStream();
int i;
while ((i = stream.Read(buffer, 0, buffer.Length)) != 0)
{
data = System.Text.Encoding.ASCII.GetString(buffer, 0, i);
Console.WriteLine("Received handshake data: {0}", data);
Console.WriteLine("Processing data.."); // sample handshake: - HANDSHAKE:nick:ip
string tempNick = data.Replace("HANDSHAKE:", "");
string[] userDetails = tempNick.Split(':'); // should store to 0:nick, 1:ip
Console.WriteLine("Received client nick: {0}", userDetails[0]);
Console.WriteLine("Received client IP: {0}", userDetails[1]);
break;
}
Thread.Sleep(1100); // sleep
buffer = System.Text.Encoding.ASCII.GetBytes(responseHandshake);
Console.WriteLine("Sending response handshake..");
stream.Write(buffer, 0, buffer.Length);
}
有没有办法让服务器一次接受多个连接并维护它们？有没有办法让客户端一次接收多条消息并在刷新消息时输入？