dccloud/WebAPIBase.NetCore/Utils/CustomErrorMiddleware.cs

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NLog;
using NLog.Web.AspNetCore;
using System.Net;
using Newtonsoft.Json;
using Microsoft.AspNetCore.Builder;

namespace WebAPIBase.Utils
{
    public class CustomErrorMiddleware
    {
        private readonly RequestDelegate _next;
        private static Logger logger = LogManager.GetCurrentClassLogger();
        public CustomErrorMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task Invoke(HttpContext httpContext)
        {
            try
            {
                await _next(httpContext);
            }
            catch (Exception ex)
            {
                logger.Error(ex);
                httpContext.Response.StatusCode = 200;
                var result = JsonConvert.SerializeObject(new ApiResponse { IsSuccess = false, ErrMsg = ex.Message + "\r\n" + ex.StackTrace, Code = 500 });
                httpContext.Response.ContentType = "application/json; charset=utf-8";
                await httpContext.Response.WriteAsync(result);
                //throw;
            }
        }

    }
    // Extension method used to add the middleware to the HTTP request pipeline.
    public static class CustomErrorMiddlewareExtensions
    {
        public static IApplicationBuilder UseCustomErrorMiddleware(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<CustomErrorMiddleware>();
        }
    }
}