76 lines
2.8 KiB
C#
76 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net.WebSockets;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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namespace EchoApp
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{
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public class Startup
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{
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// This method gets called by the runtime. Use this method to add services to the container.
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// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
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public void ConfigureServices(IServiceCollection services)
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{
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}
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// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
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public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
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{
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loggerFactory.AddConsole();
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if (env.IsDevelopment())
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{
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app.UseDeveloperExceptionPage();
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}
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app.UseWebSockets();
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app.Use(async (context, next) =>
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{
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if (context.WebSockets.IsWebSocketRequest)
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{
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var webSocket = await context.WebSockets.AcceptWebSocketAsync();
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await Echo(webSocket);
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}
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else
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{
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await next();
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}
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});
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app.UseFileServer();
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}
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private async Task Echo(WebSocket webSocket)
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{
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var buffer = new byte[1024 * 4];
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var result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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while (!result.CloseStatus.HasValue)
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{
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// If the client send "ServerClose", then they want a server-originated close to occur
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if(result.MessageType == WebSocketMessageType.Text)
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{
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var str = Encoding.UTF8.GetString(buffer, 0, result.Count);
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if(str.Equals("ServerClose"))
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{
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await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing from Server", CancellationToken.None);
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return;
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}
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}
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await webSocket.SendAsync(new ArraySegment<byte>(buffer, 0, result.Count), result.MessageType, result.EndOfMessage, CancellationToken.None);
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result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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}
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await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
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}
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}
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}
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