/// <summary>
/// Event: disconnected.
/// </summary>
/// <param name="exception"></param>
/// <returns></returns>
public override Task OnDisconnectedAsync(Exception exception)
{
string connectionId = Context.ConnectionId;
try {
if (UserConnectionIds.Count(x => x.Value.Contains(connectionId)) != 0)
{
BaseHubHandler <T> .RemoveUserConnectionId(connectionId);
}
}
catch (Exception e) {
log.Warning($"{ClassName} Error disconnecting #1! StackTrace = {e.StackTrace}.");
}
try {
if (UserConnectionIds.Count(x => x.Value.Contains(connectionId)) == 0)
{
return(base.OnDisconnectedAsync(exception));
}
}
catch (Exception e) {
log.Warning($"{ClassName} Error disconnecting #2! StackTrace = {e.StackTrace}.");
}
return(base.OnDisconnectedAsync(exception));
}
/// <summary>
/// Event: on new connection.
/// </summary>
/// <returns></returns>
public async override Task OnConnectedAsync()
{
log.Information($"{ClassName} OnConnectedAsync() called");
// Get the auth key token.
var test = Context.GetHttpContext();
string accessAuthKey = test.Request.Query["access_token"];
// Check banned auth keys.
if (BannedAuthKeys.Count(x => x.Key == accessAuthKey) == 1 && BannedAuthKeys[accessAuthKey] >= BaseHubHandler <T> .MaxAuthKeyAttempts)
{
Context.GetHttpContext().Abort();
return;
}
// Check auth token.
AuthenticationResponse auth = Authentication.AuthenticateSession(accessAuthKey);
if (auth.Success)
{
try {
// Add user into connection pool.
BaseHubHandler <T> .AddUserConnectionId(auth, Context.ConnectionId);
}
catch (Exception e) {
log.Error($"{ClassName} Error referencing User in connection pool. Exception = [{e.Message}] - StackTrace = {e.StackTrace}.");
Context.GetHttpContext().Abort();
return;
}
}
else
{
log.Information($"{ClassName} Connection failed, bad auth for authKey = [{accessAuthKey}]");
// Add to banned auth keys to avoid potential flood.
if (BannedAuthKeys.Count(x => x.Key == accessAuthKey) == 0)
{
BannedAuthKeys.Add(accessAuthKey, 1);
}
else
{
BannedAuthKeys[accessAuthKey] += 1;
if (BannedAuthKeys[accessAuthKey] >= BaseHubHandler <T> .MaxAuthKeyAttempts)
{
log.Warning($"{ClassName} - BANNED authKey because too many attemps ({BaseHubHandler<T>.MaxAuthKeyAttempts}) = [{accessAuthKey}]");
}
}
Context.GetHttpContext().Abort();
return;
}
log.Information($"{ClassName} User = [{auth.User._id}, {auth.User.Login}] successfully connected.");
await base.OnConnectedAsync();
}
