Using Azure SignalR invalid negotiation response received

Question

I am currently trying to use Azure SignalR in my Blazor app but I am currently experiencing difficulties which what looks like authentication errors.

I have set it up in my Program.cs file to include the Azure SignalR:

builder.Services.AddSignalR().AddAzureSignalR();

I have then added my connection string into the appsettings.json which is validated as when running the application I get the following message:

Hub is now connected to '(Primary)xxx.service.signalr.net')

I have mapped my hub within my Program.cs

app.MapHub<MessageHub>('/messagehub');

However when I try to connect to the hub I get the following issue:

Invalid negotiation response received.

I believe this to be me having authentication within my application and this error is being produced as a result of an unauthenticated error.

However, how can I authenticate with Azure and use that hub?

Answer 1

I have followed the MSDOC to use Azure SignalR services in Blazor App.

I hope you followed the same way. If not follow the below workaround use latest Microsoft.Azure.SignalR package in your application I have added the connection string of azure SignalR in a appsettings.json file

  "Azure": {
    "SignalR": {
      "Enabled": true,
      "ConnectionString": "<SignalR Connection String>"
    }
  },
  # use ServerStickyMode to avoid Inconsistent UI state management. If you are using many servers
"Azure:SignalR:ServerStickyMode": "Required"

I am using endpoints to Map the Hub.

app.UseEndpoints(endpoints =>
{
    endpoints.MapBlazorHub();
    endpoints.MapFallbackToPage("/Fallback page");
    endpoints.MapHub<YourHub>('/YourHub');
});

Add the Azure SignalR service in a ConfigureServices

public void ConfigureServices(IServiceCollection services) {
    services.AddSignalR().AddAzureSignalR();
    ...
}

After configuring these you can be able to authenticate your hub.

If still facing issue add the below line of code in your ConfigureServices to know the detailed error.

     services.AddSignalR(
                s => 
                {
                    s.EnableDetailedErrors = true;                    
                });

Refer SO thread for similar kind of issue