public static async Task <bool> RequestParamValidator(IClientProxy iClient, RequestAccessData payload)
{
if (String.IsNullOrEmpty(payload.SecondaryClientUserId))
{
await iClient.SendAsync(ClientSyncConstants.ErrorHandler, "Missing the parameter of secondary client's userid'");
return(false);
}
if (String.IsNullOrEmpty(payload.GroupName))
{
await iClient.SendAsync(ClientSyncConstants.ErrorHandler, "Missing the parameter of the group name for sync");
return(false);
}
return(true);
}
public async Task HandleRequest(Hub hub, RequestAccessData payload)
{
// 2nd client --> 1st client : I want to connect to TransportHub
/**
* payload has the following values:
* {
* "demo.sync.client.groupname":"mySyncGroup",
* "demo.sync.2ndclient.userid":"2ndclient",
* "demo.sync.2ndclient.connection_id":"xxx"
* }
*/
var iClientProxy = hub.Clients.Client(hub.Context.ConnectionId);
if (!await SyncServer.RequestParamValidator(iClientProxy, payload))
{
return;
}
payload.SecondaryClientConnectionId = hub.Context.ConnectionId;
await hub.Clients.Group(payload.GroupName).SendAsync(ClientSyncConstants.RequestConnectToTransportHub, payload);
}
private static Task JoinNotificationGroupAfterConnectedCore(HubConnection hubConnection, string groupName, string userId, bool requestToken)
{
hubConnection.On <string>(ClientSyncConstants.HubConnected, (connectionId) =>
{
var selfConnectionId = connectionId;
Console.WriteLine($"connection Id {selfConnectionId}");
hubConnection.SendAsync(ClientSyncConstants.JoinGroup, groupName);
});
hubConnection.On(ClientSyncConstants.JoinedGroup, async() =>
{
Console.WriteLine("Joined group");
if (requestToken)
{
// the 2nd connection to notification hub wants to connect transport hub
var requestAccess = new RequestAccessData()
{
GroupName = groupName,
SecondaryClientUserId = userId
};
await hubConnection.SendAsync(ClientSyncConstants.RequestAccess, requestAccess);
}
});
return(Task.CompletedTask);
}
public async Task RequestAccess(RequestAccessData payload)
{
var iClientProxy = Clients.Client(Context.ConnectionId);
await _syncServer.HandleRequest(this, payload);
}
