I'm currently working on a project using SignalR with ASP.NET Boilerplate .NET Core 3.1, but I've run into an issue.
Error: Negotiation failed with the server: Error: Not Found
Is there a way to resolve this problem without skipping negotiation? (Solution mentioned here)
zone-evergreen.js:2845 POST http://localhost:21021/signalr/negotiate?enc_auth_token=wNYmO41%2F Show 162 more frames signalr.min.js:16 [2020-06-07T10:17:31.634Z] Error: Connection initiation failed: Error: Not Found
Below is the Angular Code:
ngOnInit(): void {
this.renderer.addClass(document.body, 'sidebar-mini');
// Commenting out old initialization and replacing it with new one
SignalRAspNetCoreHelper.initSignalR(() => {
var chatHub = null;
abp.signalr.startConnection(abp.appPath + 'signalr-myChatHub', function (connection) {
chatHub = connection;
connection.on('getMessage', function (message) {
console.log('received message: ' + message);
});
}).then(function (connection) {
abp.log.debug('Connected to myChatHub server!');
abp.event.trigger('myChatHub.connected');
});
abp.event.on('myChatHub.connected', function() {
chatHub.invoke('sendMessage', "Hi everybody, I'm connected to the chat!");
});
});
}
Here is the .NET Core Class code :
using Abp.Dependency;
using Abp.Runtime.Session;
using Castle.Core.Logging;
using Microsoft.AspNetCore.SignalR;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
namespace HealthMapControlPanel.ChatAppService
{
public class MyChatHub : Hub, ITransientDependency
{
public IAbpSession AbpSession { get; set; }
public ILogger Logger { get; set; }
public MyChatHub()
{
AbpSession = NullAbpSession.Instance;
Logger = NullLogger.Instance;
}
public async Task SendMessage(string message)
{
await Clients.All.SendAsync("getMessage", string.Format("User {0}: {1}", AbpSession.UserId, message));
}
public override async Task OnConnectedAsync()
{
await base.OnConnectedAsync();
Logger.Debug("A client connected to MyChatHub: " + Context.ConnectionId);
}
public override async Task OnDisconnectedAsync(Exception exception)
{
await base.OnDisconnectedAsync(exception);
Logger.Debug("A client disconnected from MyChatHub: " + Context.ConnectionId);
}
}
}
Related code in Startup.cs class:
public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
app.UseSignalR(routes =>
{
routes.MapHub<MyChatHub>("/signalr-myChatHub");
});
app.UseEndpoints(endpoints =>
{
endpoints.MapHub<MyChatHub>("/signalr-myChatHub");
endpoints.MapControllerRoute("default", "{controller=Home}/{action=Index}/{id?}");
endpoints.MapControllerRoute("defaultWithArea", "{area}/{controller=Home}/{action=Index}/{id?}");
});
}
Also here is the screenshot of Web Browser Console: