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

    in .net core 3.1, I usually use this approach to handle this scenario
    
    1- Create Async Filter Attribute
    
    public class MyFilter : IAsyncAuthorizationFilter
        {
            private string _errorMessage = UserAccessErrorMessages.NO_ACCESS;
            public async Task OnAuthorizationAsync(AuthorizationFilterContext context)
            {
                string requestBody = await ReadBodyAsString(context.HttpContext.Request);
                var reportFiltration = JsonConvert.DeserializeObject(requestBody);
                var _myService = (IMyService)context.HttpContext.RequestServices.GetService(typeof(IMyService));
                    if (!hasAccess)
                    {
                        context.Result = new UnauthorizedObjectResult(_errorMessage);
                    }
            }
    
            private async Task ReadBodyAsString(Microsoft.AspNetCore.Http.HttpRequest request)
            {
                var initialBody = request.Body; // Workaround
    
                try
                {
                    //request.EnableRewind();
    
                    using (StreamReader reader = new StreamReader(request.Body))
                    {
                        string text = await reader.ReadToEndAsync();
                        return text;
                    }
                }
                finally
                {
                    // Workaround so MVC action will be able to read body as well
                    request.Body = initialBody;
                }
            }
        }
2- Create Your Custom Attribute
public class MyAttribute : TypeFilterAttribute, IAllowAnonymous
    {
        public MyAttribute () : base(typeof(MyFilter))
        {

        }
    }

3- use your filter

    [HttpPost]
    [ActionName("MyAction")]
    [MyAttribute]
    public async Task PostData([FromBody]MyModel model)