Azure SignalR Service (Preview) Group Joining from .Net Console

Question

Hi All,

I'm currently getting up to speed with the Azure SignalR Service (Preview), and have looked at the aspnet core and straight .net samples.

One of the interesting samples is:

https://www.c-sharpcorner.com/article/azure-signalr-messaging-with-net-core-console-app-server-and-client/

Which allows a connection to the SignalR Hub from a .net console to console.

I would like to utilize this, and have modified it with reference to the Azure SignalR Swagger (https://github.com/Azure/azure-signalr/blob/dev/docs/swagger/v1-preview.json) for definition of services available and am able to broadcast to all clients, or to specifics.

However I am having a problem registering the connecting users to groups for the service to send messages to specific groups.

I can see from the Swagger that I can send messages to groups, in a similar way to users (by posting to /api/v1-preview/hub/{hub}/group/{group}) however, I cannot see anything outside of a Hub class - which this sample would not have, to do the equivalent of 

Groups.AddToGroupAsync(userName, groupName);

which works in the aspnet core examples when within a hub, but I am unable to find a non-hub equivalent.

Some direction on how I go about adding a user to a group outside of the hub would be very helpful.

 

Thanks

Answer 1

I suggest you, post your query on ASP.NET SignalR forum: https://forums.asp.net/1254.aspx/ for better assistance.

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Answer 2

Thanks Ashok, 

for reference, here is the other thread:

https://forums.asp.net/t/2146808.aspx?Azure+SignalR+Service+Preview+Group+Joining+from+Net+Console

Answer 3

Sure. Thanks for sharing the link.

Answer 4

Answered at 

https://forums.asp.net/t/2146808.aspx?Azure+SignalR+Service+Preview+Group+Joining+from+Net+Console

Though, to avoid link expiration, the suggestion from the ASP.Net forums is to use a hub to accept a "JoinGroup" which is able to do the call into 

public void JoinGroup(string groupName)
{
    Groups.AddToGroupAsync(Context.ConnectionId, groupName);
}

which will be called when a client calls through to JoinGroup within an aspnet core project connecting to AzureSignalR on startup

    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            services.AddSignalR()
                    .AddAzureSignalR();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseFileServer();
            app.UseAzureSignalR(routes =>
            {
                routes.MapHub<ConsoleAppBroadcaster>("/ConsoleAppBroadcaster");
            });

        }
    }

kudos to Fei Han for this answer

As a further update, it appears as of version 1.0 release (the day after this post), the API was updated to include a PUT and DELETE to groups to add and remove users from groups

https://github.com/Azure/azure-signalr/blob/dev/docs/swagger/v1.json

Answer 5

Glad to hear that your issue is resolved. Appreciate for sharing the resolution, this would certainly benefit other community members.