using Microsoft.AspNetCore.Http;using Newtonsoft.Json;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Threading.Tasks;using System.Xml.Serialization;using UFX.Mall.EntityModel;using UFX.Tools;namespace UFX.Mall.WebApi{    public class ExceptionHandlerMiddleWare    {        private readonly RequestDelegate next;        public ExceptionHandlerMiddleWare(RequestDelegate next)        {            this.next = next;        }        public async Task Invoke(HttpContext context)        {            try            {                await next(context);            }            catch (Exception ex)            {                await HandleExceptionAsync(context, ex);            }        }        private static async Task HandleExceptionAsync(HttpContext context, Exception exception)        {            if (exception == null) return;            await WriteExceptionAsync(context, exception).ConfigureAwait(false);        }        private static async Task WriteExceptionAsync(HttpContext context, Exception exception)        {            //记录日志            LogHelper.Error(exception.GetBaseException().ToString());                        //返回友好的提示            var response = context.Response;            //状态码            if (exception is UnauthorizedAccessException)                response.StatusCode = (int)HttpStatusCode.Unauthorized;            else if (exception is Exception)                response.StatusCode = (int)HttpStatusCode.BadRequest;            response.ContentType = context.Request.Headers["Accept"];            if (response.ContentType.ToLower() == "application/xml")            {                await response.WriteAsync(Object2XmlString(ResultMsg.Failure(exception.GetBaseException().Message))).ConfigureAwait(false);            }            else            {                response.ContentType = "application/json";                await response.WriteAsync(JsonConvert.SerializeObject(ResultMsg.Failure(exception.GetBaseException().Message))).ConfigureAwait(false);            }        }        /// <summary>        /// 对象转为Xml        /// </summary>        /// <param name="o"></param>        /// <returns></returns>        private static string Object2XmlString(object o)        {            StringWriter sw = new StringWriter();            try            {                XmlSerializer serializer = new XmlSerializer(o.GetType());                serializer.Serialize(sw, o);            }            catch            {                //Handle Exception Code            }            finally            {                sw.Dispose();            }            return sw.ToString();        }    }}

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)        {            loggerFactory.AddConsole(Configuration.GetSection("Logging"));            loggerFactory.AddDebug();            //配置NLog            loggerFactory.AddNLog();            env.ConfigureNLog("nlog.config");            app.UseApplicationInsightsRequestTelemetry();            app.UseApplicationInsightsExceptionTelemetry();            //异常处理中间件            app.UseMiddleware(typeof(ExceptionHandlerMiddleWare));            app.UseMvc(); ;        }