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bcjang
2025-05-01 07:20:41 +09:00
commit 98bb2e3c5c
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ServerCommon/Helper/ServerConnectionSwitchHelper.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.DataProtection.KeyManagement;
using Microsoft.AspNetCore.Identity;
using Nettention.Proud;
using Newtonsoft.Json;
using OtpNet;
using Pipelines.Sockets.Unofficial.Buffers;
using StackExchange.Redis;
using ServerCore;
using ServerBase;
using SESSION_ID = System.Int32;
using META_ID = System.UInt32;
using ENTITY_GUID = System.String;
using ACCOUNT_ID = System.String;
using OWNER_GUID = System.String;
using USER_GUID = System.String;
using CHARACTER_GUID = System.String;
using ITEM_GUID = System.String;
namespace ServerCommon;
public static class ServerConnectionSwitchHelper
{
public static async Task<Result> registerUserOtpToTargetServer(UserBase entityUser, RedisConnector redisConnector
, string destServer)
{
var result = new Result();
var err_msg = string.Empty;
(result, var reserved_to_switch_server) = await startServerSwitch(entityUser, redisConnector, destServer);
if (result.isFail())
{
return result;
}
NullReferenceCheckHelper.throwIfNull(reserved_to_switch_server, () => $"reserved_to_switch_server is null !!!");
var account_attribute = entityUser.getEntityAttribute<AccountAttribute>();
NullReferenceCheckHelper.throwIfNull(account_attribute, () => $"account_attribute is null !!! - {entityUser.toBasicString()}");
account_attribute.OtpForServerConnect = reserved_to_switch_server.OneTimeKey;
return result;
}
public static async Task<(Result, LoginCache.ReservationToSwitchServer?)> startServerSwitch(UserBase entityUser, RedisConnector redisConnector, string destServer)
{
var result = new Result();
var err_msg = string.Empty;
try
{
var login_cache_request = new LoginCacheRequest(entityUser, redisConnector);
result = await login_cache_request.onPrepareRequest();
if (result.isFail())
{
return (result, null);
}
string key = login_cache_request.getKey();
var database = login_cache_request.getDatabase();
var value = await database.StringGetAsync(key, CommandFlags.PreferReplica);
if (value.HasValue == false)
{
err_msg = $"Not found Key !!! : Key:{key} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.RedisLoginCacheGetFailed, err_msg);
Log.getLogger().error(result.toBasicString());
return (result, null);
}
var login_cache = JsonConvert.DeserializeObject<LoginCache>(value.ToString());
if (null == login_cache)
{
err_msg = $"Failed to JsonConvert.DeserializeObject !!! : {login_cache_request.toBasicString()} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.JsonConvertDeserializeFailed, err_msg);
Log.getLogger().error(result.toBasicString());
return (result, null);
}
var otp = KeyGeneration.GenerateRandomKey(20);
var otp_encoding_by_base32 = Base32Encoding.ToString(otp);
login_cache.ReservedToSwitchServer = new LoginCache.ReservationToSwitchServer()
{
OneTimeKey = otp_encoding_by_base32,
DestServer = destServer
};
var json_string = login_cache.toJsonString();
if (await database.StringSetAsync(key, json_string, TimeSpan.FromMilliseconds(LoginCacheRequest.SERVER_SWITCH_CACHE_EXPIRY_TIME)) == false)
{
err_msg = $"Failed to StringSetAsync !!! : Key:{key}, JsonString:{json_string} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.RedisStringsWriteFailed, err_msg);
Log.getLogger().error(result.toBasicString());
return (result, null);
}
Log.getLogger().info($"Server Switching Start : currServer:{login_cache.CurrentServer}, destServer:{destServer} - {entityUser.toBasicString()}");
return (result, login_cache.ReservedToSwitchServer);
}
catch (Exception e)
{
err_msg = $"Failed to startServerSwitch !!! : Exception:{e} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.TryCatchException, err_msg);
Log.getLogger().error(result.toBasicString());
return (result, null);
}
}
public static async Task<Result> endServerSwitch(EntityBase entityUser, LoginCacheRequest loginCacheRequest
, string currConnectedServer
, DateTime switchedDateTime)
{
var result = new Result();
var err_msg = string.Empty;
try
{
var database = loginCacheRequest.getDatabase();
var login_cache = loginCacheRequest.getLoginCache();
NullReferenceCheckHelper.throwIfNull(login_cache, () => $"login_cache is null !!!");
NullReferenceCheckHelper.throwIfNull(login_cache.ReservedToSwitchServer, () => $"login_cache.ReservedToSwitchServer is null !!!");
string prev_connected_server = login_cache.CurrentServer;
login_cache.LoginDateTime = switchedDateTime;
login_cache.ServerSwitchCount += 1;
login_cache.CurrentServer = login_cache.ReservedToSwitchServer.DestServer;
login_cache.ReservedToSwitchServer = null;
var key = loginCacheRequest.getKey();
var json_string = login_cache.toJsonString();
if (await database.StringSetAsync(key, json_string, TimeSpan.FromMilliseconds(LoginCacheRequest.LOGIN_CACHE_EXPIRY_TIME)) == false)
{
err_msg = $"Failed to StringSetAsync !!! : Key:{key}, JsonString:{json_string} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.RedisStringsWriteFailed, err_msg);
Log.getLogger().error(result.toBasicString());
return result;
}
Log.getLogger().info($"Server Switching End : prevServer:{prev_connected_server} => currServer:{currConnectedServer} - {entityUser.toBasicString()}");
return result;
}
catch (Exception e)
{
err_msg = $"Failed to startServerSwitch !!! : Exception:{e} - {entityUser.toBasicString()}";
result.setFail(ServerErrorCode.TryCatchException, err_msg);
Log.getLogger().error(result.toBasicString());
return result;
}
}
}