How to send Parameter/Query in HubConnection SignalR Core

Question

I'm trying to add parameter into connection to signalr.

I'm using Builder to create my Client connection and start it:

var connection = new HubConnectionBuilder()
        .WithUrl("http://10.0.2.162:5002/connection")
        .WithConsoleLogger()
        .WithMessagePackProtocol()
        .WithTransport(TransportType.WebSockets)
        .Build();

await connection.StartAsync();

I want to send a simple parameter in this connection: Something Like:

"Token": "123"

In my server side i think i can take this parameter from HttpContext:

public override Task OnConnectedAsync()
{
    var httpContext = Context.Connection.GetHttpContext();
    var token = httpContext.Request.Query["Token"];
    return base.OnConnectedAsync();
}

Any idea of how to send this parameter? Thanks.

Note that on the latest version, it would be: `var httpContext = Context.GetHttpContext()` — stity, Jun 22 '22 at 16:58

score 40 · Accepted Answer · answered Mar 01 '18 at 11:41

40

I have found how to do this after much research:

On my build i just send the token from url connection. Like this:

var connection = new HubConnectionBuilder()
        .WithUrl($"http://10.0.2.162:5002/connection?token={token}")
        .WithConsoleLogger()
        .WithMessagePackProtocol()
        .WithTransport(TransportType.WebSockets)
        .Build();

answered Mar 01 '18 at 11:41

Pedro Franco

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Works like a charme :). Thx. – user1337 Jan 29 '19 at 11:33
2

do you have to make some kind of change to the endpoint mapping for the MessageHub on the server? I'm getting a 400 response – waxingsatirical Aug 11 '20 at 13:59

How to send Parameter/Query in HubConnection SignalR Core

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