Сбой подключения WebSocket к 'wss: //': Ошибка при рукопожатии WebSocket: Неожиданный код ответа: 404

Question

Моя конфигурация следующая:

Cloudflare Ngnix + Mysql. Net Core 2.2. MVC Приложение

Иногда я получаю следующие ошибки, когда мой сервер занят (200 человек в день). Где моя вина?

"Ошибка подключения WebSocket к удаленному хосту: ошибка во время рукопожатия WebSocket : Неожиданный код ответа: 404 "" Ошибка: не удалось запустить транспорт 'WebSockets': Ошибка: произошла ошибка с транспортом. " «Ошибка: соединение разорвано с ошибкой« Ошибка ».» «POST https://x.com/ahub?id=QQMZ6v3PHzl9srr5WX0fAw 400» «Ошибка: сервер вернул ошибку рукопожатия: рукопожатие было отменено.»

Конфигурация Ngnix:

    server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name a.com;
    root /var/www/App;

    # SSL
    ssl_certificate /etc/ssl/certs/cert.pem;
    ssl_certificate_key /etc/ssl/private/key.pem;

    # logging
    access_log /var/log/nginx/a.com.access.log;
    error_log /var/log/nginx/a.com.error.log warn;

    # reverse proxy
    location / {

        proxy_pass http://localhost:5089;
        proxy_http_version  1.1;
        proxy_cache_bypass  $http_upgrade;

        proxy_set_header Upgrade        $http_upgrade;
        proxy_set_header Connection     keep-alive;
        proxy_set_header Host           $host;      
        proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto  $scheme;
        proxy_set_header X-Forwarded-Host   $host;
        proxy_set_header X-Forwarded-Port   $server_port;
    }
    #Error pages.
    error_page 503 /maintenance.html;
    location = /maintenance.html {
        root /var/www/MaintenanceOn/;
    }

    #SignalR Hubs

    location /ahub {
        proxy_pass http://localhost:5089/exchangehub;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location /bhub {
        proxy_pass http://localhost:5089/coinhub;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location /chub {
        proxy_pass http://localhost:5089/bisthub;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location /dhub {
        proxy_pass http://localhost:5089/goldhub;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location /ehub {
        proxy_pass http://localhost:5089/parityhub;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

# HTTP redirect
server {
    listen 80;
    listen [::]:80;
    server_name  www.a.com;

    return 301 https://a.com;
}

Startup.cs

Настройка

app.UseCookiePolicy();

    app.UseSignalR(routes =>
   {

        routes.MapHub<aHub>("/ahub", options =>
       {

            //options.TransportMaxBufferSize = 0;
            //options.ApplicationMaxBufferSize = 0;

        });
       routes.MapHub<bHub>("/bhub", options =>
       {

            //options.TransportMaxBufferSize = 0;
            //options.ApplicationMaxBufferSize = 0;

        });
       routes.MapHub<cHub>("/chub", options =>
       {

            //options.TransportMaxBufferSize = 0;
            //options.ApplicationMaxBufferSize = 0;

        });
       routes.MapHub<dHub>("/dhub", options =>
       {

            //options.TransportMaxBufferSize = 0;
            //options.ApplicationMaxBufferSize = 0;

        });
       routes.MapHub<eHub>("/ehub", options =>
       {

            //options.TransportMaxBufferSize = 0;
            //options.ApplicationMaxBufferSize = 0;

        });
   });

    app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "mobile",
                template: "{area:exists}/{controller=Home}/{action=Index}");

//Default Route
routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });

Настройка службы

services.AddSignalR(options=>{ 

                options.EnableDetailedErrors = true;
                });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

JS

var connectionExchange = new signalR.HubConnectionBuilder()
    .withUrl("/ahub",{transports: ['websocket']}).withAutomaticReconnect().build();

var connectionParity = new signalR.HubConnectionBuilder()
    .withUrl("/bhub",{transports: ['websocket']}).withAutomaticReconnect().build();

    ar connectionCoin = new signalR.HubConnectionBuilder()  
    .withUrl("/chub",{transports: ['websocket']}).withAutomaticReconnect().build();

var connectionBist = new signalR.HubConnectionBuilder()
    .withUrl("/dhub",{transports: ['websocket']}).withAutomaticReconnect().build();

var connectionGold = new signalR.HubConnectionBuilder()
    .withUrl("/ehub",{transports: ['websocket']}).withAutomaticReconnect().build();