我试图为ApiController上的Get()创建一个[LoggedApiCall]过滤器
据此: ASP.NET Web API ActionFilter example
据此: ASP.NET Web API ActionFilter example
我创建了一个System.Web.HttpFilters.ActionFilterAttribute。
覆盖允许OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
解决方法@H_502_12@
@H_404_13@
我们使用我们添加到HttpConfiguration.Filters的以下过滤器。一些代码:
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}",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);
}
}
我们使用log4net,您可以用任何您认为合适的替换ILog实现。 ILog.DebugTiming只是一种扩展方法,它使用秒表来获取每次调用的时间。
编辑:
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