Do I need to have a Startup.cs on my Frontend? - asp.net

Question

This question is related to this:
The problem I'm having is that I am trying to implement a SignalR with CORS from one ASP.NET (localhost:50000) project called Frontend to another ASP.NET MVC project (in the same solution) (localhost:60000).
When I run the application I get this error message in the console:
The following errors occurred while attempting to load the app.
- No assembly found containing an OwinStartupAttribute.
- No assembly found containing a Startup or [AssemblyName].Startup class. To disable OWIN startup discovery, add the appSetting
owin:AutomaticAppStartup with a value of "false" in your web.config.
To specify the OWIN startup Assembly, Class, or Method, add the
appSetting owin:AppStartup with the fully qualified startup class or
configuration method name in your web.config.
When I add a OWIN Startup class I don't get this error message:
HTTP Error 404.0 - Not Found The resource you are looking for has been
removed, had its name changed, or is temporarily unavailable.
And I guess it's because it is trying to find the hubs in it's own project.
Question 1:
Do I need a startup on my Frontend?
Question 2 (if Question 1 == yes):
Must I in the Startup map SignalR to my Backend?
EDIT:
index.html:
<!--Script references -->
<link href="Content/bootstrap.min.css" rel="stylesheet">
<script src="Scripts/jquery-1.9.1.min.js"></script>
<script src="Scripts/jquery.signalR-2.2.0.min.js"></script>
<script src="http://localhost:50000/signalr/hubs" type="text/javascript"></script>
<!-- HEAD ^^^ -->
<!-- Deleted stuff -->
<!-- BODY vvv -->
<script type="text/javascript">
$(function () {
var broadcaster = $.connection.loginHub;
console.log("broadcaster: " + broadcaster)
$.connection.hub.start().done(function () {
});
});
</script>
After re-creating my Frontend project and only installing the Microsoft.AspNet.SignalR.JS package I know receive this error in the console:
HTTP Error 404.0 - Not Found .... Requested URL
http://localhost:60000/signalr/negotiate?clientProtocol=1.5&connectionData=%5B%5D&_=1443076975867
http://localhost:60000 is the Frontend so I'm not sure why that is the requested URL.
When checking http://localhost:50000/signalr/hubs I get a website from ASP.NET SignalR JavaScript Library v2.2.0 and also when I print out broadcaster in the console it says broadcaster: [object Object] so some sort of connection seems to be established.

Answer 1

You probably need to set up the client to point to your actual hub location since by default it's the current server.
$.connection.hub.url = '<yourbackendurl>;
Do that before connection.hub.start is called and it should work for you.

Answer 2

In your Backend project you need to install these packages:
PM> Install-Package Microsoft.AspNet.SignalR
PM> Install-Package Microsoft.Owin.Cors
And its Startup class should be like this:
public void Configuration(IAppBuilder app)
{
app.UseCors(CorsOptions.AllowAll);
app.MapSignalR();
}
In your Frontend project you need to install this package:
PM> Install-Package Microsoft.AspNet.SignalR.JS
Also you can install SignalR for .NET client:
PM> Install-Package Microsoft.AspNet.SignalR.Client