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ASP.NET MVC 与NLog的使用

2013-11-29 10:18 330 查看
NLog是一个.NET 下一个完善的日志工具,个人已经在项目中使用很久,与ELMAH相比,可能EAMAH更侧重 APS.NET MVC 包括调试路由,性能等方面,而NLog则更简洁。

github: https://github.com/NLog/NLog
web: http://nlog-project.org
logview:http://www.gibraltarsoftware.com/loupe/extensions/nlog
http://stackoverflow.com/questions/710863/log4net-vs-nlog
http://stackoverflow.com/questions/4091606/most-useful-nlog-configurations


Supported targets include:
Files - single file or multiple, with automatic file naming and archival
Event Log - local or remote
Database - store your logs in databases supported by .NET
Network - using TCP, UDP, SOAP, MSMQ protocols
Command-line console - including color coding of messages
E-mail - you can receive emails whenever application errors occur
ASP.NET trace
... and many more

Other key features:
very easy to configure, both through configuration file and programmatically
easy-to-use logger pattern known from log4xxx
advanced routing using buffering, asynchronous logging, load balancing, failover, and more
cross-platform support: .NET Framework, .NET Compact Framework and Mono (on Windows and Unix)


安装





配置

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<!--
See http://nlog-project.org/wiki/Configuration_file for information on customizing logging rules and outputs.
-->

<!-- 使用说明
1.一般控制台调式日志(打印到控制台)
logger.Trace("GetHotelBrand 操作数据库异常 sqlText : " + sqlText);
2. 一般文本日志,如记录接口,响应值等 请求参数等(记录文本,支持异步),
logger.Info("GetHotelBrand 操作数据库异常 sqlText : " + sqlText);
3.错误日志  一般影响到业务流程的正常使用 (记录到DB)
logger.ErrorException("GetHotelBrand 操作数据库异常 sqlText : " + sqlText, ex);
4.致命性错误  如金额数据,订单数据操作失败  (发送邮件通知)
logger.FatalException("GetHotelBrand 操作数据库异常 sqlText : " + sqlText, ex);
-->

<targets>
<!-- add your targets here -->
<!--调式打印控制台日志-->
<target name="console" xsi:type="ColoredConsole" layout="[${date:format=yyyy-MM-dd HH\:mm\:ss}][${level}] ${message} ${exception}"/>

<!-- 记录一般INFO文本日志(启用异步) -->
<target name="file" xsi:type="AsyncWrapper" queueLimit="5000" overflowAction="Discard">
<target xsi:type="File" fileName="${basedir}/logs/${shortdate}/${level}.log"  layout="${longdate} ${uppercase:${level}} ${message}"  maxArchiveFiles="100" />
</target>

<!-- 发生错误异常记录数据库日志 -->
<target name="database" xsi:type="Database"  useTransactions="true" connectionString="Data Source=xxxxxxxx;Initial Catalog=Log;Persist Security Info=True;User ID=sa;Password=123456"  commandText="insert into NLogException_HomeinnsInterface([CreateOn],[Origin],[LogLevel], [Message], [Exception],[StackTrace]) values (getdate(), @origin, @logLevel, @message,@exception, @stackTrace);">
<!--日志来源-->
<parameter name="@origin" layout="${callsite}"/>
<!--日志等级-->
<parameter name="@logLevel" layout="${level}"/>
<!--日志消息-->
<parameter name="@message" layout="${message}"/>
<!--异常信息-->
<parameter name="@exception" layout="${exception}" />
<!--堆栈信息-->
<parameter name="@stackTrace" layout="${stacktrace}"/>
</target>

<!-- 发生致命错误发送邮件日志 -->
<target name="email" xsi:type="Mail"
header="-----header------"
footer="-----footer-----"
layout="${longdate} ${level} ${callsite} ${message} ${exception:format=Message, Type, ShortType, ToString, Method, StackTrace}"
html="false"
encoding="UTF-8"
addNewLines="true"
subject="${message}"
to=""
from=""
body="${longdate} ${level} ${callsite} ${message} ${exception:format=Message, Type, ShortType, ToString, Method, StackTrace}"
smtpUserName=""
enableSsl="false"
smtpPassword=""
smtpAuthentication="Basic"
smtpServer="smtp.163.com"
smtpPort="25">
</target>
</targets>
<rules>
<!-- add your logging rules here -->
<logger name="*" minlevel="Trace" writeTo="console" />
<logger name="*" minlevel="Info" writeTo="file" />
<logger name="*" minlevel="Error" writeTo="database"/>
<logger name="*" minlevel="Fatal" writeTo="email" />
</rules>
</nlog>


配置什么的也没有什么好说的,跟相对Log4j配置简洁些,支持 控制台,文件(异步),数据库,Email,够用了,其他的方式还没有研究。

日志查看

这里推荐一款日志查看工具:Loupe ,支持.NET 平台下集成,在Asp.NET MVC 下只需要配置Nuget引用相应的包。

Install-Package Gibraltar.Agent.Web.Mvc


注册拦截器


using Gibraltar.Agent;
using Gibraltar.Agent.Web.Mvc.Filters;

public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
// Initialize Gibraltar Loupe
Log.StartSession();
GlobalConfiguration.Configuration.Filters.Add(new WebApiRequestMonitorAttribute());
GlobalFilters.Filters.Add(new MvcRequestMonitorAttribute());
GlobalFilters.Filters.Add(new UnhandledExceptionAttribute());
}
}






结合SignalR

今天看到一篇与signalr结合的文章,可以把记录的日志主动推送到浏览器 : http://www.codeproject.com/Articles/758633/Streaming-logs-with-SignalR ,原理NLog支持MethodCallTarget特性,发生异常时,可以触发Signalr的相关方法,从而推送错误消息到浏览器。

<configSections>
<section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog" />
</configSections>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" throwExceptions="false">
<targets>
<target name="debug" xsi:type="Debugger" layout=" #${longdate} - ${level} - ${callsite} - ${message}" />
<target name="signalr" xsi:type="MethodCall" className="SignalRTargetHub, App_Code" methodName="Send">
<parameter layout="${longdate}" />
<parameter layout="${level}" />
<parameter layout="${callsite}: ${message}" />
</target>
</targets>
<rules>
<logger name="*" minlevel="Trace" writeTo="debug" />
<logger name="*" minlevel="Trace" writeTo="signalr" />
</rules>
</nlog>


使用OWIN宿主,Open Web Interface for .NET (OWIN)在Web服务器和Web应用程序之间建立一个抽象层。OWIN将网页应用程序从网页服务器分离出来,然后将应用程序托管于OWIN的程序而离开IIS之外。

public class SignalRTargetHub : Hub
{
public void Hello()
{
this.Clients.Caller.logEvent(
DateTime.UtcNow.ToLongTimeString(),
"info",
"SignalR connected");
}

static IHubContext signalRHub;
public static void Send(string longdate, string logLevel, String message)
{
if (signalRHub == null)
{
signalRHub = GlobalHost.ConnectionManager.GetHubContext<SignalRTargetHub>();
}

if (signalRHub != null)
{
signalRHub.Clients.All.logEvent(longdate, logLevel, message);
}
}
}

[assembly: OwinStartup(typeof(SignalRStartup))]
public class SignalRStartup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}


注册Global事件

Logger logger = NLog.LogManager.GetCurrentClassLogger();
void Application_Error(object sender, EventArgs e)
{
Exception lastException = Server.GetLastError();
logger.Fatal("Request: '{0}'\n Exception:{1}", HttpContext.Current.Request.Url, lastException);
}




Refer:
How to NLog (2.1) with VisualStudio 2013

http://www.codeproject.com/Tips/749612/How-to-NLog-with-VisualStudio

Logging: How to Growl with NLog 3

http://www.codeproject.com/Articles/786304/Logging-How-to-Growl-with-NLog-or

Five methods to Logging in MVC 3.0(介绍较详细,需FQ)

http://www.codeproject.com/Tips/237171/Five-methods-to-Logging-in-MVC

微软最新的Web服务器Katana发布了版本3(OWIN)

http://www.infoq.com/cn/news/2014/08/Katana-3

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