Is there any way to get request body in .NET Core FilterAttribute?

Question

Sample of my request

http://localhost:8065/api/note
POST
content-type:application/json
request body: { \"id\" : \"1234\", \"title\" : \"test\", \"status\" : \"dr         


        

Answer 1

Following snippet worked for me, to log request only if there is any exception.(.Net Core 3.1)

{

public class ExceptionFilter : IActionFilter
{
    private ConcurrentDictionary requests = new ConcurrentDictionary();

    public void OnActionExecuted(ActionExecutedContext context)
    {
        if (context.Exception != null)

        {
            StringBuilder parameters = new StringBuilder();

            _logger.LogError("Error while executing action:" + context.ActionDescriptor.DisplayName);

            string errRequest;
            if(requests.TryGetValue(context.HttpContext.TraceIdentifier,out errRequest))
            {
                _logger.LogError(errRequest);
            }

            _logger.LogError(context.Exception);

            context.Result = new ObjectResult("Error!!!")
            {
                StatusCode = 500,
            };
            context.ExceptionHandled = true;
        }

        string req;
            requests.Remove(context.HttpContext.TraceIdentifier, out req);


    }

    public void OnActionExecuting(ActionExecutingContext context)
    {
        StringBuilder sb = new StringBuilder();
        foreach (var arg in context.ActionArguments)
        {

            sb.Append(arg.Key.ToString() + ":" + Newtonsoft.Json.JsonConvert.SerializeObject(arg.Value) + "\n");

        }
        requests.TryAdd(context.HttpContext.TraceIdentifier, sb.ToString());
    }


}

}