Accessing SignalR Hub created in ASP.Net from ASP.Net core. RRS feed

  • Question

  • Im trying CORS.

    SignalR server is created in ASP.Net using this link . And im trying to access the Hub from ASP.Net Core client application using "@aspnet/signalr-client". My question is

    1.  Is this possible?.
    2. If possible, how the "/signalr/hub" js will be used in asp.net core.

    I tried this and got this error when i call .start();

    Error while establishing connection -  "SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at HttpConnection.<anonymous> (HttpConnection.js:41)
    at Generator.next (<anonymous>)
    at fulfilled (HttpConnection.js:6)
    at ZoneDelegate.invoke (vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:86198)
    at Object.onInvoke (vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:15003)
    at ZoneDelegate.invoke (vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:86197)
    at Zone.run (vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:85948)
    at vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:86625
    at ZoneDelegate.invokeTask (vendor.js?v=RCvRrqPvM2Kc5BlkEQ045FeXR6gPMRIwfn51ludN14I:86231)"

    im trying to connect the Hub from type script code. if i use normal jquery in index.chtml then it gets connected. Is this possible from type script

    my index.chtml code

    @section scripts {
        <script src="~/dist/main-client.js" asp-append-version="true"></script>
        <!--Reference the autogenerated SignalR hub script. -->
        <script src="http://localhost:52527/Scripts/jquery-1.10.2.min.js"></script>
        <script src="http://localhost:52527/Scripts/jquery.signalR-2.0.3.min.js"></script>
        <script src="http://localhost:52527/signalr/hubs"></script>
            $(function () {
                $.connection.hub.url = "http://localhost:52527/signalr/ChatHub"
                // Start the connection.
                try {
                    $.connection.hub.start({ transport: 'longPolling' }).done(function () {
                        console.log('Hub connection started');
                catch (error) { console.log('Error while establishing connection', error);}


    my home.component.ts code

    ngOnInit() {
            this._hubConnection = new HubConnection('http://localhost:52527/chatHub', { transport: TransportType.LongPolling, logging: LogLevel.Information });
            this._hubConnection.on('Send', (data: any) => {
                const received = `Received: ${data}`;
                .then(() => {
                    console.log('Hub connection started')
                .catch((error) => {
                    console.log('Error while establishing connection' , error)

    Thanks in advance.

    • Moved by CoolDadTx Thursday, February 15, 2018 3:44 PM ASP.NET related
    Thursday, February 15, 2018 12:53 PM

All replies