How to add a query string to the connection?

[coffeecoding]

I want my server to identify me, for example by my username. For that I need to pass my username when opening a connection, how to do that?

[golovin-igor]

You can use accessTokenFactory, that adds token parameter to the query:

void createHubConnection() async {
      final httpConnectionOptions = new HttpConnectionOptions(
          accessTokenFactory: () async => 'put_some_token_here',
          logMessageContent: false);

      _hubConnection = HubConnectionBuilder()
          .withUrl(kHubConnectionURL, options: httpConnectionOptions);

      await _hubConnection.start();
     _hubConnection.invoke("tokenTest", args: <Object>[]);
}

then on server you will be able to retrieve token as following:

[HubMethodName("tokenTest")]
public async Task<string> TokenTest()
{
   var request = Context.GetHttpContext().Request;
   if (request.Query.ContainsKey("access_token"))
   {
            string token = request.Query["access_token"].FirstOrDefault();
            //check user token here
   }
}

[magnuswikhog]

Is it possible to do this during the initial connection instead of invoking a method after the connection has already been established?

[coffeecoding]

@magnuswikhog
I suppose you use the args array in

await _hubConnection.start();
_hubConnection.invoke("tokenTest", args: <Object>[]);

Does that suffice for your purpose?