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kayomn 2024-10-06 13:08:17 +01:00
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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.0.31903.59
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Client", "Client\Client.csproj", "{3D2D449D-6621-40C2-990E-576F5AE4F2F9}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Server", "Server\Server.csproj", "{294DEED9-3074-4735-997C-59C98A7D4E2C}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{3D2D449D-6621-40C2-990E-576F5AE4F2F9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{3D2D449D-6621-40C2-990E-576F5AE4F2F9}.Debug|Any CPU.Build.0 = Debug|Any CPU
{3D2D449D-6621-40C2-990E-576F5AE4F2F9}.Release|Any CPU.ActiveCfg = Release|Any CPU
{3D2D449D-6621-40C2-990E-576F5AE4F2F9}.Release|Any CPU.Build.0 = Release|Any CPU
{294DEED9-3074-4735-997C-59C98A7D4E2C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{294DEED9-3074-4735-997C-59C98A7D4E2C}.Debug|Any CPU.Build.0 = Debug|Any CPU
{294DEED9-3074-4735-997C-59C98A7D4E2C}.Release|Any CPU.ActiveCfg = Release|Any CPU
{294DEED9-3074-4735-997C-59C98A7D4E2C}.Release|Any CPU.Build.0 = Release|Any CPU
{0BA4A503-885B-4919-BBAD-61075DCC6FC3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{0BA4A503-885B-4919-BBAD-61075DCC6FC3}.Debug|Any CPU.Build.0 = Debug|Any CPU
{0BA4A503-885B-4919-BBAD-61075DCC6FC3}.Release|Any CPU.ActiveCfg = Release|Any CPU
{0BA4A503-885B-4919-BBAD-61075DCC6FC3}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>

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using System.Net;
using System.Net.Sockets;
const ushort port = 4444;
using var tcp = new TcpClient();
var hasQuit = false;
var serverListening = new Thread(() =>
{
var stream = new BinaryReader(tcp.GetStream());
while (true)
{
const int checkDelayMilliseconds = 100;
try
{
Console.WriteLine(stream.ReadString());
}
catch (EndOfStreamException)
{
Console.WriteLine("Server closed the connection");
break;
}
Thread.Sleep(checkDelayMilliseconds);
}
});
Console.Write("Enter a name: ");
var name = Console.ReadLine() ?? "user";
Console.Write("Enter a Chattle server address: ");
var ipAddress = IPAddress.Parse(Console.ReadLine() ?? "127.0.0.1");
tcp.Connect(ipAddress, port);
serverListening.Start();
Console.WriteLine($"Connected to {ipAddress}...");
var writer = new BinaryWriter(tcp.GetStream());
writer.Write(name);
while (!hasQuit)
{
const int checkDelayMilliseconds = 100;
var input = Console.ReadLine();
if (input == null || input.Length == 0)
{
continue;
}
if (input.StartsWith('/'))
{
switch (input.Trim()[1 ..])
{
case "quit": hasQuit = true; break;
default: Console.WriteLine($"Unknown command `{input}.`"); break;
}
}
else
{
writer.Write(input);
}
Thread.Sleep(checkDelayMilliseconds);
}
tcp.Close();
serverListening.Join();

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using System.Collections.Concurrent;
using System.Net.Sockets;
internal class Connections : IDisposable
{
private record struct User(TcpClient Tcp, Thread Thread);
private readonly ConcurrentDictionary<string, uint> _aliasUsages = [];
private readonly ConcurrentDictionary<string, User> _users = [];
public void Accept(TcpListener tcp)
{
try
{
var client = tcp.AcceptTcpClient();
new Thread(() => Listen(client)).Start();
}
catch (SocketException)
{
return;
}
}
private void Broadcast(TcpClient tcp, string alias, string action)
{
bool NotMe(User aliasUser) => aliasUser.Tcp != tcp;
var message = $"{alias} {action}";
Console.WriteLine(message);
foreach (var user in _users.Values.Where(NotMe))
{
var writer = new BinaryWriter(user.Tcp.GetStream());
writer.Write(message);
writer.Flush();
}
}
public void Dispose()
{
foreach (var user in _users.Values)
{
user.Tcp.Close();
user.Thread.Join();
user.Tcp.Dispose();
}
}
private void Listen(TcpClient tcp)
{
var reader = new BinaryReader(tcp.GetStream());
var requestedAlias = reader.ReadString();
var usages = _aliasUsages.GetOrAdd(requestedAlias, 0);
var alias = (usages == 0) ? requestedAlias : $"{requestedAlias} ({usages})";
_aliasUsages[requestedAlias] += 1;
if (!_users.TryAdd(alias, new User(tcp, Thread.CurrentThread)))
{
throw new InvalidOperationException("User with alias already exists");
}
Broadcast(tcp, alias, "has connected.");
while (true)
{
const int checkDelayMilliseconds = 100;
try
{
var message = reader.ReadString();
Broadcast(tcp, alias, $": {message}");
}
catch (EndOfStreamException)
{
break;
}
Thread.Sleep(checkDelayMilliseconds);
}
if (!_users.Remove(alias, out var _))
{
throw new InvalidOperationException("User with alias does not exist");
}
Broadcast(tcp, alias, "has disconnected.");
}
}

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using System.Net;
using System.Net.Sockets;
const ushort port = 4444;
using var tcp = new TcpListener(IPAddress.Loopback, port);
bool hasQuit = false;
var connectionListening = new Thread(() =>
{
using var liveConnections = new Connections();
while (!hasQuit)
{
const int retryDelayMilliseconds = 100;
liveConnections.Accept(tcp);
Thread.Sleep(retryDelayMilliseconds);
}
});
tcp.Start();
connectionListening.Start();
Console.WriteLine($"Server listening on port {port}...");
while (!hasQuit)
{
var input = Console.ReadLine();
if (input == null)
{
continue;
}
switch (input.ToLower())
{
case "quit": hasQuit = true; break;
default: Console.WriteLine($"Unknown command `{input}.`"); break;
}
}
tcp.Stop();
connectionListening.Join();
Console.WriteLine("Server closed");

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>