[ASP.Net Core] Hybrid Filter

 ASP.NET Core   Filter  

▌Introduction

---

ASP.NET Core supports the Filter types:

1.  Authorization filter

2.  Resource filter

3.  Action filter

4.  Exception filter

5.  Result filter

And the lifecycle of them is as following (Diagram from Microsoft Docs)

Sometimes we would like to use the already-updated data from some of them.

Here is an example for logging the payload of request and the final HttpStatusCode of response.

▋Related articles

1.  [MVC] Pass parameters to ActionFilterAttribute

2.  [ASP.Net Core] Action Filter with Parameter(s)

▌Environment

---

▋.NET Core 2.2.104

▌Implement

---

▋Hybrid filter by implement IActionFilter and IResultFilter

public class HybridFilter: IActionFilter, IResultFilter

{

        private readonly ILogger<LogFilter> _logger = null;

        private ICollection<object> payloads = null;

        public HybridFilter(ILogger<LogFilter> logger)

        {

            this._logger = logger;

        }

        public void OnActionExecuting(ActionExecutingContext context)

        {

            this.payloads = context.ActionArguments == null ? null : context.ActionArguments.Values;

        }

        public void OnActionExecuted(ActionExecutedContext context)

        {

        }

        public void OnResultExecuting(ResultExecutingContext context)

        {

        }

        public void OnResultExecuted(ResultExecutedContext context)

        {

            var user = (User)this.payloads.FirstOrDefault();

            int httpStatusCode = context.HttpContext.Response.StatusCode;

            string msg = $"({httpStatusCode.ToString()}) {user.Name} signed in";

            this._logger.LogInformation(msg);

        }

}

Result:

▋Source code

Github

▌Reference

---