.NET Core SignalR 3.0 Exception

Question

NOTE: This is SignalR for .NET Core 3.

I saw a couple of other stackoverflow suggestions (similar but not exact) for the applicationUrl modification which I have tried. I am getting:

Unhandled exception. System.InvalidOperationException: A path base can only be configured using IApplicationBuilder.UsePathBase(). at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.ParseAddress(String address, Boolean& https) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IServerAddressesFeature addresses, KestrelServerOptions serverOptions, ILogger logger, Func2 createBinding) at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.StartAsync[TContext](IHttpApplication1 application, CancellationToken cancellationToken) at Microsoft.AspNetCore.Hosting.WebHost.StartAsync(CancellationToken cancellationToken) at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, String startupMessage) at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, String startupMessage) at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token) at Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host) at cRioSaturnSignalRHub.Program.RunDefaultWebHostBuilder(String[] args, IConfigurationRoot config) in C:\Workspace\software\DataTier\dotNetCore\v3.x\Daemons\cRioSaturnSignalRHub\cRioSaturnSignalRHub\Program.cs:line 83 at cRioSaturnSignalRHub.Program.RunProcess(String[] args) in C:\Workspace\software\DataTier\dotNetCore\v3.x\Daemons\cRioSaturnSignalRHub\cRioSaturnSignalRHub\Program.cs:line 50 at cRioSaturnSignalRHub.Program.Main(String[] args) in C:\Workspace\software\DataTier\dotNetCore\v3.x\Daemons\cRioSaturnSignalRHub\cRioSaturnSignalRHub\Program.cs:line 27

The launch settings have applicationUrl = "http://localhost:5000" & the endpoint name is not on it as suggested in other stackoverflow related issue.

Any suggestions?

Answer 1

The problem is not at all related to the applicationUrl. Instead I tried the EnvironmentalVariables approach with the ASPNETCORE_URLS="http://*:5000" To do this I added .AddEnvironmentVariables() with the ConfigurationBuilder. & with WebHost.CreateDefaultBuilder(), I added .UseConfiguration(config). After this little change everything works when I publish & run.