public override Task ProcessRequestAsync(IRequest req, IResponse res, string operationName)
{
res.ContentType = MimeTypes.ServerSentEvents;
res.AddHeader(HttpHeaders.CacheControl, "no-cache");
res.KeepAlive = true;
res.Flush();
var serverEvents = req.TryResolve <IServerEvents>();
IAuthSession session = req.GetSession();
var userAuthId = session != null ? session.UserAuthId : null;
var anonUserId = serverEvents.GetNextSequence("anonUser");
var userId = userAuthId ?? ("-" + anonUserId);
var displayName = session.GetSafeDisplayName()
?? "user" + anonUserId;
var feature = HostContext.GetPlugin <ServerEventsFeature>();
var now = DateTime.UtcNow;
var subscriptionId = SessionExtensions.CreateRandomSessionId();
var subscription = new EventSubscription(res)
{
CreatedAt = now,
LastPulseAt = now,
Channel = req.QueryString["channel"] ?? EventSubscription.UnknownChannel,
SubscriptionId = subscriptionId,
UserId = userId,
UserName = session != null ? session.UserName : null,
DisplayName = displayName,
SessionId = req.GetPermanentSessionId(),
IsAuthenticated = session != null && session.IsAuthenticated,
Meta =
{
{ "userId", userId },
{ "displayName", displayName },
{ AuthMetadataProvider.ProfileUrlKey, session.GetProfileUrl() ?? AuthMetadataProvider.DefaultNoProfileImgUrl },
}
};
if (feature.OnCreated != null)
{
feature.OnCreated(subscription, req);
}
var heartbeatUrl = req.ResolveAbsoluteUrl("~/".CombineWith(feature.HeartbeatPath))
.AddQueryParam("id", subscriptionId);
var unRegisterUrl = req.ResolveAbsoluteUrl("~/".CombineWith(feature.UnRegisterPath))
.AddQueryParam("id", subscriptionId);
var privateArgs = new Dictionary <string, string>(subscription.Meta)
{
{ "id", subscriptionId },
{ "unRegisterUrl", unRegisterUrl },
{ "heartbeatUrl", heartbeatUrl },
{ "heartbeatIntervalMs", ((long)feature.HeartbeatInterval.TotalMilliseconds).ToString(CultureInfo.InvariantCulture) }
};
if (feature.OnConnect != null)
{
feature.OnConnect(subscription, privateArgs);
}
serverEvents.Register(subscription, privateArgs);
var tcs = new TaskCompletionSource <bool>();
subscription.OnDispose = _ =>
{
try
{
res.EndHttpHandlerRequest(skipHeaders: true);
}
catch { }
tcs.SetResult(true);
};
return(tcs.Task);
}