ASP.NET Web API 2：ExceptionLogger和异常处理程序

Question

我试图在web api中实现全局异常日志记录，并发送frienldy消息给用户使用该错误ID，所以他可以回到我们的错误ID，所以我们可以修复它。我采取两种：

• System.Web.Http.ExceptionHandling.ExceptionLogger
• System.Web.Http.ExceptionHandling.ExceptionHandler

这里是我的类中的覆盖ExceptionLogger抽象类：

public class GlobalExceptionLogger : System.Web.Http.ExceptionHandling.ExceptionLogger 
{ 
    public override void Log(ExceptionLoggerContext context) 
    { 
     LogMessage logMsg = new LogMessage(); 
     logMsg.ID = System.Guid.NewGuid().ToString(); 
     logMsg.MessageType = MessageType.ResourceServerAPI; 
     logMsg.SenderMethod = context.Request.RequestUri != null ? string.Format("Request URL: {0}", context.Request.RequestUri.ToString()) : ""; 
     logMsg.Level = MesageLevel.Error; 
     logMsg.MachineName = Environment.MachineName; 
     logMsg.Message = context.Exception.Message; 

     Logger.LogError(logMsg); 
    } 
} 

这里是如何我处理错误：

public class GlobalExceptionHandler : System.Web.Http.ExceptionHandling.ExceptionHandler 
{ 
    public override void Handle(ExceptionHandlerContext context) 
    { 
     var metadata = new ErrorData 
     { 
      Message = "An error occurred! Please use the ticket ID to contact our support", 
      DateTime = DateTime.Now, 
      RequestUri = context.Request.RequestUri, 
      ErrorId = //get the ID already logged 
     }; 

     var response = context.Request.CreateResponse(HttpStatusCode.InternalServerError, metadata); 
     context.Result = new ResponseMessageResult(response);   
    } 
} 

由于异常记录发生在处理之前，将异常记录器中的ID传递给异常处理程序以发送最终用户相应的错误ID的最佳方式是什么？

Answer 1

你可以把它添加到HttpRequestMessage.Properties：

public class GlobalExceptionLogger : System.Web.Http.ExceptionHandling.ExceptionLogger 
{ 
    public override void Log(ExceptionLoggerContext context) 
    { 
     LogMessage logMsg = new LogMessage(); 
     logMsg.ID = System.Guid.NewGuid().ToString(); 
     logMsg.MessageType = MessageType.ResourceServerAPI; 
     logMsg.SenderMethod = context.Request.RequestUri != null ? string.Format("Request URL: {0}", context.Request.RequestUri.ToString()) : ""; 
     logMsg.Level = MesageLevel.Error; 
     logMsg.MachineName = Environment.MachineName; 
     logMsg.Message = context.Exception.Message; 

     // Set the ID 
     context.Request.SetLogId(logMsg.ID); 

     Logger.LogError(logMsg); 
    } 
} 

public class GlobalExceptionHandler : System.Web.Http.ExceptionHandling.ExceptionHandler 
{ 
    public override void Handle(ExceptionHandlerContext context) 
    { 
     // Get the ID 
     var id = context.Request.GetLogId(); 

     var metadata = new ErrorData 
     { 
      Message = "An error occurred! Please use the ticket ID to contact our support", 
      DateTime = DateTime.Now, 
      RequestUri = context.Request.RequestUri, 
      ErrorId = id 

     }; 

     var response = context.Request.CreateResponse(HttpStatusCode.InternalServerError, metadata); 
     context.Result = new ResponseMessageResult(response); 
    } 
} 

：

public static class HttpRequestMessageExtensions 
{ 
    private const string LogId = "LOG_ID"; 

    public static void SetLogId(this HttpRequestMessage request, Guid id) 
    { 
     request.Properties[LogId] = id; 
    } 

    public static Guid GetLogId(this HttpRequestMessage request) 
    { 
     object value; 
     if (request.Properties.TryGetValue(LogId, out value)) 
     { 
      return (Guid) value; 
     } 

     return Guid.Empty; 
    } 
} 

然后在你的记录器/处理器使用这些扩展方法