Get back Request Body within ActionFilter

asp.net-mvc, asp.net-web-api, asp.net-web-api2, c#

Solution

you're just dealing with request body so don't need to use `OnActionExecutedAsync` method, you can just override `OnActionExecuting` like this,

public override void OnActionExecuting(HttpActionContext actionContext)

   {
       var test = (actionContext.Request.Content as ObjectContent).Value.ToString();
       // your logging code here
   }

Another option available in WebAPI is `DelegatingHandler`. if you want to log just request body then override `SendAsync` method,

public class ApiLogHandler : DelegatingHandler
{
 protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,          
                                               CancellationToken cancellationToken)
 {
   var requestBody = request.Content.ReadAsStringAsync().Result;
   // your logging code here
   return base.SendAsync(request, cancellationToken);
 }
}

If you decided to choose `DelegatingHandler` then you need to register that handler to `Global message handlers`.

Problem

For logging purposes, I am trying to monitor the requests being made through a WebAPI. I have created and I am looking for a way to get back the body sent through in a request after the request has been fulfilled and responded to. I am trying to do this through using a `ActionFilter` but thus far have failed in reading the body from the request. Can anybody give some advice how I may access this information? For context I am trying to do this within this code: ``` public class LoggingActionFilter : ActionFilterAttribute { public override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken) { var test = actionExecutedContext.Request.Content.ReadAsStringAsync().Result; return base.OnActionExecutedAsync(actionExecutedContext, cancellationToken); } } ``` I have tried reading back the `Content` on the `actionExecutedContext` variable in order to get back the body but have found this to return just blank so far.

Original source