static async Task WhenConnectionIsEstablishedAsync(this ManagedWebSocket websocket)
{
// update status
websocket.SetStatus("Initializing");
var correlationID = UtilityService.NewUUID;
// prepare session
try
{
var query = websocket.RequestUri.ParseQuery();
var session = Global.GetSession(websocket.Headers, query, $"{(websocket.RemoteEndPoint as IPEndPoint).Address}");
// update session identity
session.SessionID = query.TryGetValue("x-session-id", out var sessionID) ? sessionID.Url64Decode() : "";
if (string.IsNullOrWhiteSpace(session.SessionID))
{
throw new InvalidRequestException("Session identity is not found");
}
// update device identity
session.DeviceID = query.TryGetValue("x-device-id", out var deviceID) ? deviceID.Url64Decode() : "";
if (string.IsNullOrWhiteSpace(session.DeviceID))
{
throw new InvalidRequestException("Device identity is not found");
}
// update session
websocket.Set("Session", session);
await websocket.PrepareConnectionInfoAsync(correlationID, session, Global.CancellationTokenSource.Token, RTU.Logger).ConfigureAwait(false);
// wait for few times before connecting to API Gateway Router because RxNET needs that
if (query.ContainsKey("x-restart"))
{
await Task.WhenAll(
websocket.SendAsync(new UpdateMessage {
Type = "Knock"
}),
Task.Delay(345, Global.CancellationTokenSource.Token)
).ConfigureAwait(false);
}
}
catch (Exception ex)
{
await RTU.WebSocket.CloseWebSocketAsync(websocket, ex is InvalidRequestException?WebSocketCloseStatus.InvalidPayloadData : WebSocketCloseStatus.InternalServerError, ex is InvalidRequestException?$"Request is invalid => {ex.Message}" : ex.Message).ConfigureAwait(false);
return;
}
// subscribe an updater to push messages to client device
websocket.Set("Updater", Services.Router.IncomingChannel.RealmProxy.Services
.GetSubject <UpdateMessage>("messages.update")
.Subscribe(
async message => await websocket.PushAsync(message).ConfigureAwait(false),
async exception => await Global.WriteLogsAsync(RTU.Logger, "Http.InternalAPIs", $"Error occurred while fetching an updating message => {exception.Message}", exception).ConfigureAwait(false)
)
);
// subscribe a communicator to update related information
websocket.Set("Communicator", Services.Router.IncomingChannel.RealmProxy.Services
.GetSubject <CommunicateMessage>("messages.services.apigateway")
.Subscribe(
async message => await websocket.CommunicateAsync(message).ConfigureAwait(false),
async exception => await Global.WriteLogsAsync(RTU.Logger, "Http.InternalAPIs", $"Error occurred while fetching an inter-communicating message => {exception.Message}", exception).ConfigureAwait(false)
)
);
// update status
websocket.SetStatus("Connected");
if (Global.IsVisitLogEnabled)
{
await Global.WriteLogsAsync(RTU.Logger, "Http.Visits", $"The real-time updater (RTU) is started" + "\r\n" + websocket.GetConnectionInfo() + "\r\n" + $"- Status: {websocket.GetStatus()}", null, Global.ServiceName, LogLevel.Information, correlationID).ConfigureAwait(false);
}
}
static async Task WhenMessageIsReceivedAsync(this ManagedWebSocket websocket, WebSocketReceiveResult result, byte[] data)
{
// receive continuous messages
object message;
if (!result.EndOfMessage)
{
websocket.Extra["Message"] = websocket.Extra.TryGetValue("Message", out message) ? (message as byte[]).Concat(data) : data;
return;
}
// last message or single small message
var stopwatch = Stopwatch.StartNew();
var correlationID = UtilityService.NewUUID;
if (websocket.Extra.TryGetValue("Message", out message))
{
message = (message as byte[]).Concat(data);
websocket.Extra.Remove("Message");
}
else
{
message = data;
}
// check message
var requestMsg = result.MessageType.Equals(WebSocketMessageType.Text) ? (message as byte[]).GetString() : null;
if (string.IsNullOrWhiteSpace(requestMsg))
{
return;
}
// wait for the initializing process is completed
while ("Initializing".IsEquals(websocket.GetStatus()))
{
await Task.Delay(UtilityService.GetRandomNumber(123, 456), Global.CancellationTokenSource.Token).ConfigureAwait(false);
}
// check session
var session = websocket.Get <Session>("Session");
if (session == null)
{
await Task.WhenAll
(
Global.WriteLogsAsync(RTU.Logger, "Http.InternalAPIs", $"No session is attached - Request: {requestMsg}", null, Global.ServiceName, LogLevel.Critical, correlationID),
RTU.WebSocket.CloseWebSocketAsync(websocket, WebSocketCloseStatus.PolicyViolation, "No session")
).ConfigureAwait(false);
return;
}
// prepare
var requestObj = requestMsg.ToExpandoObject();
var serviceName = requestObj.Get("ServiceName", "");
var objectName = requestObj.Get("ObjectName", "");
var verb = requestObj.Get("Verb", "GET").ToUpper();
var query = new Dictionary <string, string>(requestObj.Get("Query", new Dictionary <string, string>()), StringComparer.OrdinalIgnoreCase);
query.TryGetValue("object-identity", out var objectIdentity);
// visit logs
if (Global.IsVisitLogEnabled)
{
await Global.WriteLogsAsync(RTU.Logger, "Http.Visits",
$"Request starting {verb} " + $"/{serviceName}{(string.IsNullOrWhiteSpace(objectName) ? "" : $"/{objectName}")}{(string.IsNullOrWhiteSpace(objectIdentity) ? "" : $"/{objectIdentity}")}".ToLower() + (query.TryGetValue("x-request", out var xrequest) ? $"?x-request={xrequest}" : "") + " HTTPWS/1.1" + " \r\n" +