NLog組件


接觸.net項目的同志們都清楚,最初在項目中記錄日志常用的是log4net日志組件,隨着.net框架的不對優化升級,最近新流行的日志框架nlog,下面我就對nlog組件說說自己的認知:

下載

通過Nuget安裝NLog

 

 配置

在項目根目錄下新建一個NLog.config(在Nuget包中也可以下載NLog.config包,下載默認的位置是C盤,可能和你的工程不在同一個文件夾,不建議使用),基本目錄結構:targets下面配置日志輸出目標及相關參數,rules下面配置目標輸出規則:

 1 <?xml version="1.0" ?>
 2 <nlog>
 3     <targets>
 4         <target></target>
 5         <target></target>
 6     </targets>
 7     <rules>
 8         <logger></logger>
 9         <logger></logger>
10     </rules>
11 </nlog>
NLog.config

記得在NLog.config的屬性中設置 Copy to Output Directory: Copy always,作用是每次重新生成解決方案的時候都會將改配置文件復制的本地目錄,否則本地找不到配置文件無法將日志記錄到文件中:

完整的配置文件如下,日志配置文件盡量單獨創建一個文件:

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 3   <targets>
 4     <!--寫入文件-->
 5     <target   xsi:type="File" name="DebugFile"   fileName="Logs\Debug\${shortdate}.log"
 6      layout="日志時間:${longdate}${newline}日志來源:${callsite}${newline}日志級別:${uppercase:${level}}${newline}消息內容:${message}${newline}異常信息:${exception}${newline}==============================================================${newline}" >
 7     </target>
 8     <target   xsi:type="File" name="InfoFile"    fileName="Logs\Info\${shortdate}.log"
 9       layout="日志時間:${longdate}${newline}日志來源:${callsite}${newline}日志級別:${uppercase:${level}}${newline}消息內容:${message}${newline}異常信息:${exception}${newline}==============================================================${newline}" >
10     </target>
11     <target  xsi:type="File"  name="ErrorFile"   fileName="Logs\Error\${shortdate}.log"
12       layout="日志時間:${longdate}${newline}日志來源:${callsite}${newline}日志級別:${uppercase:${level}}${newline}消息內容:${message}${newline}異常信息:${exception}${newline}==============================================================${newline}" >
13     </target>
14 
15     <target xsi:type="Database" name="NewDatabase" >
16       <dbProvider>System.Data.SqlClient</dbProvider>
17       <connectionString>
18         Data Source=127.0.0.1;Initial Catalog=FlightAnalysis;Persist Security Info=true;User ID=sa;Password=111111;       
19       </connectionString>
20       <commandText>
21         insert into OperatorLog(Id,AppName,ModuleName,ProcName,OperationType,Logger,LogMessage,IP,UserName,LogLevel)
22         <!--values(@Id,'','','',0,'','','','','',getdate())-->
23         values(@Id,@AppName,@ModuleName,@ProcName,@OperationType,@Logger,@LogMessage,@IP,@UserName,@LogLevel)
24       </commandText>
25       <parameter name="@Id" layout="${event-context:item=Id}" />
26       <parameter name="@AppName" layout="${event-context:item=AppName}" />
27       <parameter name="@ModuleName" layout="${event-context:item=ModuleName}" />
28       <parameter name="@ProcName" layout="${event-context:item=ProcName}" />
29       <parameter name="@OperationType" layout="${event-context:item=OperationType}" />
30       <parameter name="@Logger" layout="${event-context:item=Logger}" />
31       <parameter name="@LogMessage" layout="${event-context:item=LogMessage}" />
32       <parameter name="@IP" layout="${event-context:item=IP}" />
33       <parameter name="@Longdate" layout="${event-context:item=Longdate}" />
34       <parameter name="@UserName" layout="${event-context:item=UserName}" />
35       <parameter name="@Createdate" layout="${longdate}" />
36       <parameter name="@LogLevel" layout="${level}" />
37     </target>
38   </targets>
39 
40   <rules>
41     <!--根據日志級別分別寫文件,也可以放一個文件中-->
42     <!--<logger name="DbLogger" levels="Debug,Info,Error" writeTo="MyFile" />-->
43     <logger name="MyLogger" level="Debug" writeTo="DebugFile" />
44     <logger name="MyLogger" level="Info" writeTo="InfoFile" />
45     <logger name="MyLogger" level="Error" writeTo="ErrorFile" />
46     <!--寫數據庫-->
47     <logger name="MyLogger" levels="Trace,Debug,Info,Error"  writeTo="NewDatabase"/>
48   </rules>
49 </nlog>
NLog.config
  • 如在根節點(nlog)配置 internalLogLevel, internalLogFile,可以查看NLog輸出日志時的內部信息,比如你配置文件有錯誤,很有幫助,不過項目發布后還是關閉比較好,以免影響效率;
  • 在target外面罩了一個 <target>並且xsi:type為 AsyncWrapper,即表示這條 target 將異步輸出,這里我將文件和數據庫日志異步輸出;
  • db target內指定了數據庫連接字符串 connectionString,SQL語句,SQL參數,還可以指定數據庫/表創建和刪除的腳本(推薦看NLog源碼示例,這里不介紹),同時我們自定義了2個參數 action和amount;
  • target參數里有些是NLog內置參數,比如message,level,date,longdate,exception,stacktrace等,NLog在輸出時會自動賦值;
  • layout設置了每條日志的格式;
  • 在rules節點,我們分別指定了三個target輸出日志的級別,NLog 用於輸出日志的級別包括:Trace,Debug,Info,Warn,Error,Fatal,可以設置 minlevel設置最小級別,也可以用 levels定義你所有需要的級別(多個用逗號分隔)。
  • event-context代表自定義的參數。

 數據庫連接示例: https://www.cnblogs.com/weiweictgu/p/5848805.html

 

 

路由規則(Rules)

   <rules />區域定義了日志的路由規則。每一個路由表項就是一個<logger />元素。<logger />有以下屬性:

  1. name - 日志源/記錄者的名字 (允許使用通配符*)
  2. minlevel - 該規則所匹配日志范圍的最低級別
  3. maxlevel - 該規則所匹配日志范圍的最高級別
  4. level - 該規則所匹配的單一日志級別
  5. levels - 該規則所匹配的一系列日志級別,由逗號分隔。
  6. writeTo - 規則匹配時日志應該被寫入的一系列目標,由逗號分隔。
  7. final - 標記當前規則為最后一個規則。其后的規則即時匹配也不會被運行

封裝

對NLog.config的Logger進行簡單封裝:

  1  /// <summary>
  2     /// 日志類,只提供接口
  3     /// 2018-11-6 15:32:01
  4     /// </summary>
  5     public class Logger
  6     {
  7         #region 初始化
  8         //獲取指定的名稱為logger。
  9         //private static NLog.Logger _dblogger = NLog.LogManager.GetLogger("MyLogger");
 10         /// <summary>
 11         /// 日事件間類
 12         /// </summary>
 13         private LogEventInfo lei = new LogEventInfo();
 14         /// <summary>
 15         /// 數據錯誤無法獲取用戶時使用
 16         /// </summary>
 17         public static string DefaultUser = "system";
 18         /// <summary>
 19         /// 默認IP地址
 20         /// </summary>
 21         public static string DefaultIP = "127.0.0.1";
 22         /// <summary>
 23         /// 提供日志接口和實用程序功能
 24         /// </summary>
 25         private  NLog.Logger _logger = null;
 26         /// <summary>
 27         /// 自定義日志對象供外部使用
 28         /// </summary>
 29         public static Logger Default { get; private set; }
 30          
 31         private Logger(NLog.Logger logger)
 32         {
 33             _logger = logger;
 34         }
 35         public Logger(string name) : this(LogManager.GetLogger(name))
 36         { }
 37        
 38         static Logger()
 39         {
 40             //獲取具有當前類名稱的日志程序。
 41             Default = new Logger("MyLogger");
 42         }
 43         #endregion 
 44 
 45         #region Debug
 46         public void Debug(string msg, params object[] args)
 47         {
 48             _logger.Debug(msg, args);
 49         }
 50 
 51         public void Debug(string msg, Exception err)
 52         {
 53             _logger.Debug(err, msg);
 54         }
 55         #endregion
 56 
 57         #region Info
 58         public void Info(string msg, params object[] args)
 59         {
 60             _logger.Info(msg, args);
 61         }
 62 
 63         public void Info(string msg, Exception err)
 64         {
 65             _logger.Info(err, msg);
 66         }
 67         #endregion
 68 
 69         #region Warn
 70         /// <summary>
 71         ///警告
 72         /// </summary>
 73         /// <param name="msg">警告信息</param>
 74         /// <param name="args">動態參數</param>
 75         public void Warn(string msg, params object[] args)
 76         {
 77             _logger.Warn(msg, args);
 78         }
 79         /// <summary>
 80         ///警告
 81         /// </summary>
 82         /// <param name="msg">警告信息</param>
 83         /// <param name="err">異常信息</param>
 84         public void Warn(string msg, Exception err)
 85         {
 86             _logger.Warn(err, msg);
 87         }
 88         #endregion
 89 
 90         #region Trace
 91         /// <summary>
 92         /// 使用指定的參數在跟蹤級別寫入診斷消息
 93         /// </summary>
 94         /// <param name="msg">跟蹤信息</param>
 95         /// <param name="args">動態參數</param>
 96         public void Trace(string msg, params object[] args)
 97         {
 98             _logger.Trace(msg, args);
 99         }
100         /// <summary>
101         /// 使用指定的參數在跟蹤級別寫入診斷消息
102         /// </summary>
103         /// <param name="msg">跟蹤信息</param>
104         /// <param name="args">異常信息</param>
105         public void Trace(string msg, Exception err)
106         {
107             _logger.Trace(err, msg);
108         }
109         #endregion
110 
111         #region Error
112         /// <summary>
113         /// 使用指定的參數在錯誤級別寫入診斷消息。
114         /// </summary>
115         /// <param name="msg">錯誤信息</param>
116         /// <param name="args">動態參數</param>
117         public void Error(string msg, params object[] args)
118         {
119             _logger.Error(msg, args);
120         }
121         /// <summary>
122         /// 使用指定的參數在錯誤級別寫入診斷消息。
123         /// </summary>
124         /// <param name="msg">錯誤信息</param>
125         /// <param name="args">異常信息</param>
126         public void Error(string msg, Exception err)
127         {
128             _logger.Error(err, msg);
129         }
130         #endregion
131 
132         #region Fatal
133         /// <summary>
134         /// 使用指定的參數在致命級別寫入診斷消息。
135         /// </summary>
136         /// <param name="msg">致命錯誤</param>
137         /// <param name="args">動態參數</param>
138         public void Fatal(string msg, params object[] args)
139         {
140             _logger.Fatal(msg, args);
141         }
142         /// <summary>
143         /// 使用指定的參數在致命級別寫入診斷消息。
144         /// </summary>
145         /// <param name="msg">致命錯誤</param>
146         /// <param name="args">異常信息</param>
147         public void Fatal(string msg, Exception err)
148         {
149             _logger.Fatal(err, msg);
150         }
151         /// <summary>
152         /// 刷新所有掛起的日志消息(在異步目標的情況下)。
153         /// </summary>
154         /// <param name="timeoutMilliseconds">最大的時間允許沖洗。此后的任何消息都將被丟棄。</param>
155         public void Flush(int? timeoutMilliseconds = null)
156         {
157             if (timeoutMilliseconds != null)
158                 NLog.LogManager.Flush(timeoutMilliseconds.Value);
159 
160             NLog.LogManager.Flush();
161         }
162         #endregion
163 
164 
165         #region Operator日志寫入
166         /// <summary>
167         /// 寫入日志信息
168         /// </summary>
169         /// <param name="operatorLogModel">操作信息</param>
170         public void InsOperatorLog(OperatorLogModel operatorLogModel)
171         {
172             var level = LogLevel.Info;
173             if (operatorLogModel.LogLevel == NLog.LogLevel.Trace)
174                 level = LogLevel.Trace;
175             else if (operatorLogModel.LogLevel == NLog.LogLevel.Debug)
176                 level = LogLevel.Debug;
177             else if (operatorLogModel.LogLevel == NLog.LogLevel.Info)
178                 level = LogLevel.Info;
179             else if (operatorLogModel.LogLevel == NLog.LogLevel.Warn)
180                 level = LogLevel.Warn;
181             else if (operatorLogModel.LogLevel == NLog.LogLevel.Error)
182                 level = LogLevel.Error;
183             else if (operatorLogModel.LogLevel == NLog.LogLevel.Fatal)
184                 level = LogLevel.Fatal;
185 
186             if (operatorLogModel.LogMessage.Length > 3000)
187             {
188                 operatorLogModel.LogMessage = operatorLogModel.LogMessage.Substring(0, 3000);
189             }
190             lei.Properties["Id"] = Guid.NewGuid().ToString("D");
191             lei.Properties["AppName"] = operatorLogModel.AppName;
192             lei.Properties["ModuleName"] = operatorLogModel.ModuleName;
193             lei.Properties["ProcName"] = operatorLogModel.ProcName;
194             lei.Properties["OperationType"] = operatorLogModel.OperationType;
195             lei.Properties["Logger"] = operatorLogModel.Logger;
196             lei.Properties["LogMessage"] = operatorLogModel.LogMessage;
197             lei.Properties["IP"] = operatorLogModel.IP ?? DefaultIP;
198             lei.Properties["Longdate"] = operatorLogModel.Longdate;
199             lei.Properties["UserName"] = operatorLogModel.UserName ?? DefaultUser;
200             lei.Properties["Createdate"] = operatorLogModel.Createdate;
201             lei.Level = operatorLogModel.LogLevel;
202             _logger.Log(level, lei);
203         }
204         #endregion 
205     }
Logger

對操作類型進行簡單封裝,也可以自定義:

 1 /// <summary>
 2     /// 操作類型枚舉
 3     /// </summary>
 4     public enum OperationType
 5     {
 6         /// <summary>
 7         /// 保存或添加
 8         /// </summary>
 9         [System.ComponentModel.Description("添加")]
10         ADD,
11         /// <summary>
12         /// 更新
13         /// </summary>
14         [System.ComponentModel.Description("更新")]
15         UPDATE,
16         /// <summary>
17         /// 核銷
18         /// </summary>
19         [System.ComponentModel.Description("核銷")]
20         AUDIT,
21         /// <summary>
22         /// 查看
23         /// </summary>
24         [System.ComponentModel.Description("指派")]
25         ASSIGN,
26         /// <summary>
27         /// 刪除
28         /// </summary>
29         [System.ComponentModel.Description("刪除")]
30         DELETE,
31         /// <summary>
32         /// 讀取/查詢
33         /// </summary>
34         [System.ComponentModel.Description("查詢")]
35         RETRIEVE,
36         /// <summary>
37         /// 登錄
38         /// </summary>
39         [System.ComponentModel.Description("登錄")]
40         LOGIN,
41         /// <summary>
42         /// 查看
43         /// </summary>
44         [System.ComponentModel.Description("查看")]
45         LOOK
46     }
OperationType

自定義類,主要用於綁定數據:

 1 /// <summary>
 2     /// 操作日志類
 3     /// </summary>
 4     public class OperatorLogModel
 5     {
 6         /// <summary>
 7         /// 自增主鍵ID
 8         /// </summary>
 9         public string Id { get; set; }
10         /// <summary>
11         /// 一級菜單
12         /// </summary>
13         public string AppName { get; set; }
14         /// <summary>
15         /// 二級菜單
16         /// </summary>
17         public string ModuleName { get; set; }
18         /// <summary>
19         /// 本級菜單
20         /// </summary>
21         public string ProcName { get; set; }
22         /// <summary>
23         /// 操作類型
24         /// </summary>
25         public int OperationType { get; set; }
26         /// <summary>
27         /// 日志文件
28         /// </summary>
29         public string Logger { get; set; }
30         /// <summary>
31         /// 日志信息
32         /// </summary>
33         public string LogMessage { get; set; }
34         /// <summary>
35         /// IP地址
36         /// </summary>
37         public string IP { get; set; }
38         /// <summary>
39         /// 記錄時間
40         /// </summary>
41         public string Longdate { get; set; }
42         /// <summary>
43         /// 用戶名稱
44         /// </summary>
45         public string UserName { get; set; }
46         /// <summary>
47         /// 日志級別
48         /// </summary>
49         public NLog.LogLevel LogLevel { get; set; }
50         /// <summary>
51         /// 創建時間
52         /// </summary>
53         public DateTime Createdate { get; set; }
54     }
OperatorLogModel

創建數據庫表,字段可以自定義,此處用的是SQL Server:

 1 CREATE TABLE [dbo].[OperatorLog](
 2     [Id] [varchar](60) NOT NULL,
 3     [AppName] [varchar](20) NOT NULL,
 4     [ModuleName] [varchar](30) NOT NULL,
 5     [ProcName] [varchar](30) NOT NULL,
 6     [OperationType] [int] NOT NULL,
 7     [Logger] [varchar](500) NOT NULL,
 8     [LogMessage] [varchar](3000) NOT NULL,
 9     [IP] [varchar](32) NOT NULL,
10     [UserName] [varchar](36) NOT NULL,
11     [Createdate] [datetime] NOT NULL,
12     [LogLevel] [varchar](12) NOT NULL,
13  CONSTRAINT [PK_OperatorLog] PRIMARY KEY CLUSTERED 
14 (
15     [Id] ASC
16 )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
17 ) ON [PRIMARY]
18 
19 GO
20 
21 SET ANSI_PADDING OFF
22 GO
23 
24 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_Id]  DEFAULT ('') FOR [Id]
25 GO
26 
27 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_AppName]  DEFAULT ('') FOR [AppName]
28 GO
29 
30 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_ModuleName]  DEFAULT ('') FOR [ModuleName]
31 GO
32 
33 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_ProcName]  DEFAULT ('') FOR [ProcName]
34 GO
35 
36 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_OperationType]  DEFAULT ((0)) FOR [OperationType]
37 GO
38 
39 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_Logger]  DEFAULT ('') FOR [Logger]
40 GO
41 
42 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_LogMessage]  DEFAULT ('') FOR [LogMessage]
43 GO
44 
45 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_IP]  DEFAULT ('') FOR [IP]
46 GO
47 
48 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_UserName]  DEFAULT ('') FOR [UserName]
49 GO
50 
51 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF__OperatorL__creat__02084FDA]  DEFAULT (getdate()) FOR [Createdate]
52 GO
53 
54 ALTER TABLE [dbo].[OperatorLog] ADD  CONSTRAINT [DF_OperatorLog_LogLevel]  DEFAULT ('') FOR [LogLevel]
55 GO
56 
57 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'日志表主鍵ID' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'Id'
58 GO
59 
60 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'一級菜單' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'AppName'
61 GO
62 
63 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'二級菜單' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'ModuleName'
64 GO
65 
66 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'本級菜單' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'ProcName'
67 GO
68 
69 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'操作類型' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'OperationType'
70 GO
71 
72 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'日志文件' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'Logger'
73 GO
74 
75 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'日志內容' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'LogMessage'
76 GO
77 
78 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'IP地址' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'IP'
79 GO
80 
81 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'用戶名' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'UserName'
82 GO
83 
84 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'創建時間' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'Createdate'
85 GO
86 
87 EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'日志級別' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'OperatorLog', @level2type=N'COLUMN',@level2name=N'LogLevel'
88 GO
[dbo].[OperatorLog]

引用日志如下:

 1  public class Program
 2     {
 3         public static void Main(string[] args)
 4         {
 5             OperatorLogModel opModel = new OperatorLogModel();
 6             opModel.AppName = "系統管理";
 7             opModel.ModuleName = "權限管理";
 8             opModel.ProcName = "用戶管理";
 9             opModel.OperationType = Convert.ToInt32(Enum.Parse(typeof(OperationType), OperationType.RETRIEVE.ToString()));
10             opModel.UserName = "ss";
11             //opModel.LogLevel = NLog.LogLevel.Trace;
12             opModel.Longdate = DateTime.Now.ToString();
13             opModel.Createdate = DateTime.Now;
14             opModel.Logger = "dfdfd";
15             opModel.LogMessage = "測試測試測試!!!";
16             Logger.Default.Error("dsfsfsfd");
17             //string ip = Request.HttpContext.Connection.RemoteIpAddress.ToString();
18 
19             //Logger.Default.Info("就是這么霸氣"); 
20 
21             Logger.Default.InsOperatorLog(opModel);
22             CreateWebHostBuilder(args).Build().Run();
23         }
24 
25         public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
26             WebHost.CreateDefaultBuilder(args)
27                 .UseStartup<Startup>();
28     }
Program

數據庫插入的操作日志結果如下:

文件中記錄的日志如下:

 以上就是NLog日志組件的簡單封裝,歡迎糾錯!!!

 


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