public async Task Invoke(HttpContext context)
{
if (!context.WebSockets.IsWebSocketRequest)
{
await _next.Invoke(context);
return;
}
/*string strSecWebSocketKeyValue = context.Request.Headers["Sec-WebSocket-Key"].ToString();
* SHA1 sha = SHA1.Create();
* string strSecWebSocketKeyValue_ForSha = strSecWebSocketKeyValue + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
* byte[] hash_buffer = Encoding.Default.GetBytes(strSecWebSocketKeyValue_ForSha);
* byte[] hash_result = sha.ComputeHash(hash_buffer);
* string strResult = Encoding.Default.GetString(hash_result);
* string strResultBase64 = Util_Common.Encoder_Base64(strResult);
* if (!context.Response.Headers.ContainsKey("Sec-WebSocket-Accept"))
* context.Response.Headers.Add("Sec-WebSocket-Accept", strResultBase64);
* else
* context.Response.Headers["Sec-WebSocket-Accept"] = strResultBase64;
* context.Response.Headers["Sec-WebSocket-Protocol"] = "chat";
*/
string token = get_ClientToken(context.Request, "student_token");
if (Global.LoginServices.verify_logined_token(token))
{
CancellationToken ct = context.RequestAborted;
var currentSocket = await context.WebSockets.AcceptWebSocketAsync();
AppLoader newApploader = new AppLoader();
string uname = Global.LoginServices.Pool_Logined[token].name;
_accountTokenMap.TryAdd(uname, token);
string socketId = token;
if (!_sockets.ContainsKey(socketId))
{
_sockets.TryAdd(socketId, currentSocket);
newApploader.InitApiConfigs(Global.GlobalDefines.SY_CONFIG_FILE);
newApploader.ConnectDB(Global.GlobalDefines.DB_KEY_IKCODER_BASIC);
newApploader.LoadSPS(Global.GlobalDefines.DB_SPSMAP_FILE);
}
while (true)
{
try
{
if (ct.IsCancellationRequested)
{
break;
}
string response = await ReceiveStringAsync(currentSocket, ct);
if (string.IsNullOrEmpty(response))
{
if (currentSocket.State != WebSocketState.Open)
{
break;
}
continue;
}
string activeAction = string.Empty;
string returnContent = ProcessProtocal(token, response, newApploader, out activeAction);
await SendStringAsync(currentSocket, BuildReturnDoc(returnContent, activeAction, false), ct);
}
catch
{
continue;
}
}
WebSocket dummy_socket;
_sockets.TryRemove(socketId, out dummy_socket);
string dummy_token;
_accountTokenMap.TryRemove(uname, out dummy_token);
newApploader.CloseDB();
await currentSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", ct);
currentSocket.Dispose();
}
}
