如何記錄添加到MVC4的WebAPI

Question

我想上ApiController 創建一個Get()一個[LoggedApiCall]過濾器根據這一點：ASP.NET Web API ActionFilter example

我創建了一個System.Web.HttpFilters.ActionFilterAttribute。 的倍率允許OnActionExecuted(HttpActionExecutedContext actionExecutedContext)

我似乎無法找到一種方法，從HttpActionExecutedContext

也許我會有關記錄每個API調用錯誤的方式獲得致電者的IP？

Answer 1

我們使用下面的過濾器，我們添加到HttpConfiguration.Filters。有些代碼：

internal class LoggingFilter : IExceptionFilter, IActionFilter 
{ 
    private readonly ILog log; 

    public LoggingFilter(ILog log) 
    { 
     if (log == null) 
     { 
      throw new ArgumentNullException("log"); 
     } 

     this.log = log; 
    } 

    public bool AllowMultiple 
    { 
     get { return false; } 
    } 

    Task IExceptionFilter.ExecuteExceptionFilterAsync(HttpActionExecutedContext actionContext, CancellationToken cancellationToken) 
    { 
     if (actionContext == null) 
     { 
      throw new ArgumentNullException("actionContext"); 
     } 

     this.log.Error(string.Format("Unexpected error while executing {0}", this.BuildLogEntry(actionContext.ActionContext)), actionContext.Exception); 
     return TaskHelpers.Completed(); 
    } 

    Task<HttpResponseMessage> IActionFilter.ExecuteActionFilterAsync(HttpActionContext actionContext, CancellationToken cancellationToken, Func<Task<HttpResponseMessage>> continuation) 
    { 
     if (actionContext == null) 
     { 
      throw new ArgumentNullException("actionContext"); 
     } 

     if (continuation == null) 
     { 
      throw new ArgumentNullException("continuation"); 
     } 

     if (!this.log.IsDebugEnabled) 
     { 
      // no point running at all if logging isn't currently enabled 
      return continuation(); 
     } 

     string logEntry = this.BuildLogEntry(actionContext); 
     IDisposable logContext = this.log.DebugTiming("Executing {0}", logEntry); 

     Task<string> requestContent; 
     if (actionContext.Request.Content != null) 
     { 
      requestContent = actionContext.Request.Content.ReadAsStringAsync().ContinueWith(requestResult => string.IsNullOrEmpty(requestResult.Result) ? "N/A" : requestResult.Result); 
     } 
     else 
     { 
      requestContent = TaskHelpers.FromResult("N/A"); 
     } 

     return requestContent.ContinueWith(
      requestResult => 
       { 
        this.log.DebugFormat("{0}, Request = {1}", logEntry, requestResult.Result); 

        return continuation() 
         .ContinueWith(t => 
          { 
           Task<string> responseContent; 
           if (t.IsCompleted && t.Result.Content != null) 
           { 
            responseContent = t.Result.Content.ReadAsStringAsync().ContinueWith(responseResult => string.IsNullOrEmpty(responseResult.Result) ? "N/A" : responseResult.Result); 
           } 
           else 
           { 
            responseContent = TaskHelpers.FromResult("N/A"); 
           } 

           return responseContent.ContinueWith(
            responseResult => 
             { 
              using (logContext) 
              { 
               this.log.DebugFormat("{0}, Status Code: {1}, Response = {2}", logEntry, t.Result.StatusCode, responseResult.Result); 
              } 

              return t.Result; 
             }); 
          }).Unwrap(); 
       }).Unwrap(); 
    } 

    /// <summary> 
    /// Builds log data about the request. 
    /// </summary> 
    /// <param name="actionContext">Data associated with the call</param> 
    private string BuildLogEntry(HttpActionContext actionContext) 
    { 
     string route = actionContext.Request.GetRouteData().Route.RouteTemplate; 
     string method = actionContext.Request.Method.Method; 
     string url = actionContext.Request.RequestUri.AbsoluteUri; 
     string controllerName = actionContext.ActionDescriptor.ControllerDescriptor.ControllerName; 
     string actionName = actionContext.ActionDescriptor.ActionName; 

     return string.Format("{0} {1}, route: {2}, controller:{3}, action:{4}", method, url, route, controllerName, actionName); 
    } 
} 

我們使用log4net的，可以更換ILog執行，不管你認爲合適的。 ILog.DebugTiming只是一個擴展方法，它使用秒錶來獲取每個呼叫的經過時間。

編輯： 此帖子Get the IP address of the remote host詳細介紹瞭如何獲取遠程調用者的IP地址。

乾杯， 院長