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Program.cs
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Program.cs
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using ColocDuty.InGame;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using System;
using System.Collections.Concurrent;
using System.IO;
using System.Linq;
using System.Net.WebSockets;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace ColocDuty
{
class Program
{
static void Main(string[] args)
{
var ip = Environment.GetEnvironmentVariable("IP") ?? "0.0.0.0";
if (!int.TryParse(Environment.GetEnvironmentVariable("PORT"), out var port)) port = 80;
var url = $"http://{ip}:{port}";
#if DEBUG
var appPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
string publicPath;
var directory = Directory.GetParent(appPath);
while (true)
{
publicPath = Path.Combine(directory.FullName, "Public");
if (Directory.Exists(publicPath)) break;
directory = directory.Parent;
}
#else
var appPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
var publicPath = Path.Combine(appPath, "Public");
#endif
var shutdownTokenSource = new CancellationTokenSource();
var shutdownToken = shutdownTokenSource.Token;
Console.WriteLine($"Loading cards...");
var cardsDatabasePath = Path.Combine(publicPath, "CardsDatabase.tsv");
var cardsImagePath = Path.Combine(publicPath, "Assets", "Cards");
Game.LoadCards(cardsDatabasePath, cardsImagePath, shutdownToken);
Console.WriteLine($"Cards loaded.");
ConcurrentDictionary<string, Room> rooms = new ConcurrentDictionary<string, Room>();
var roomTasks = new ConcurrentDictionary<Task, byte>();
var builder = WebHost.CreateDefaultBuilder();
builder.UseUrls(url);
builder.ConfigureServices((services) => services.AddRouting());
var roomCodeRandom = new Random();
string GenerateRoomCode()
{
var code = "";
for (var i = 0; i < 4; i++) code += (char)('A' + roomCodeRandom.Next(0, 26));
return code;
}
string gameHtml = "";
void LoadGameHtml() => gameHtml = File.ReadAllText(Path.Combine(publicPath, "game.html"));
LoadGameHtml();
builder.Configure((app) =>
{
app.UseWebSockets();
app.Use(WebSocketMiddleware);
app.UseRouter((router) =>
{
router.MapGet("", (context) => { context.Response.Redirect("index.html"); return Task.CompletedTask; });
router.MapGet("start", (context) =>
{
var room = new Room(shutdownToken);
while (true)
{
room.Code = GenerateRoomCode();
if (rooms.TryAdd(room.Code, room)) break;
}
Task roomTask = null;
roomTask = Task.Run(() =>
{
room.Start();
roomTasks.TryRemove(roomTask, out _);
rooms.TryRemove(room.Code, out _);
return Task.CompletedTask;
});
roomTasks.TryAdd(roomTask, 0);
context.Response.Redirect("/view/" + room.Code);
return Task.CompletedTask;
});
router.MapGet("view/{code}", context =>
{
var roomCode = context.GetRouteValue("code") as string;
if (roomCode == null)
{
context.Response.StatusCode = 400;
return Task.CompletedTask;
}
#if DEBUG
if (!rooms.ContainsKey(roomCode))
{
context.Response.Redirect("/start");
return Task.CompletedTask;
}
LoadGameHtml();
#endif
return context.Response.WriteAsync(gameHtml);
});
router.MapGet("play/{code}", context =>
{
var roomCode = context.GetRouteValue("code");
#if DEBUG
LoadGameHtml();
#endif
return context.Response.WriteAsync(gameHtml);
});
});
app.UseStaticFiles(new StaticFileOptions
{
RequestPath = "",
FileProvider = new PhysicalFileProvider(publicPath),
#if DEBUG
// TODO: Only in debug? need to do cache busting though
OnPrepareResponse = context =>
{
context.Context.Response.Headers.Add("Cache-Control", "no-cache, no-store");
context.Context.Response.Headers.Add("Expires", "-1");
}
#endif
});
});
using (var host = builder.Build())
{
host.Start();
Console.WriteLine($"Server listening on {url}.");
host.WaitForShutdown();
}
shutdownTokenSource.Cancel();
Task.WaitAll(roomTasks.Keys.ToArray());
async Task WebSocketMiddleware(HttpContext context, Func<Task> next)
{
if (!context.WebSockets.IsWebSocketRequest) { await next(); return; }
if (!context.Request.Path.StartsWithSegments("/room", out var codeWithSlash)) { await next(); return; }
var code = codeWithSlash.ToString().Substring(1);
if (!rooms.TryGetValue(code, out var room))
{
context.Response.StatusCode = 404;
return;
}
var originHeaders = context.Request.Headers["Origin"];
if (originHeaders.Count != 1)
{
context.Response.StatusCode = 400;
return;
}
Peer peer = null;
try
{
using (var socket = await context.WebSockets.AcceptWebSocketAsync())
{
peer = new Peer(socket);
room.AddPeer(peer);
WebSocketReceiveResult receiveResult;
var buffer = new byte[1024 * 16];
var segment = new ArraySegment<byte>(buffer);
while (!shutdownToken.IsCancellationRequested)
{
receiveResult = await socket.ReceiveAsync(segment, shutdownToken);
if (receiveResult.MessageType != WebSocketMessageType.Text) break;
if (!receiveResult.EndOfMessage) break;
string data;
try
{
data = Encoding.UTF8.GetString(buffer, 0, receiveResult.Count);
}
catch (Exception exception)
{
Console.WriteLine($"WebSocket received invalid UTF8 text.");
Console.WriteLine(exception);
return;
}
room.ReceiveMessage(peer, data);
}
}
}
catch (WebSocketException exception)
{
Console.WriteLine($"WebSocket closed with error code {exception.WebSocketErrorCode}.");
}
finally
{
if (peer != null) room.RemovePeer(peer);
}
}
}
}
}