asp.net core 2.0 中间件(Middleware)异常处理并且返回异常信息给调用者

1、中间件(Middleware)拦截所有的异常并返回给调用者

public class ExceptionHandler{    private readonly RequestDelegate _next;    public ExceptionHandler(RequestDelegate next)    {        _next = next;    }    public async Task Invoke(HttpContext context)    {        try        {            await _next.Invoke(context);        }        catch (Exception ex)        {            await HandleExceptionAsync(context, ex);        }    }    private async Task HandleExceptionAsync(HttpContext context, Exception exception)    {        var response = context.Response;        response.ContentType = "application/json";        response.StatusCode = (int)HttpStatusCode.InternalServerError;        await response.WriteAsync(JsonConvert.SerializeObject(new        {            // customize as you need            error = new            {                message = exception.Message,                exception = exception.GetType().Name            }        }));    }}

2、在Startup.cs中Configure方法中配置

public void Configure(IApplicationBuilder app, IHostingEnvironment env, Microsoft.Extensions.Logging.ILoggerFactory loggerFactory){    loggerFactory.AddNLog();    env.ConfigureNLog(Path.Combine(AppContext.BaseDirectory, "nlog.config"));    if (env.IsDevelopment())        app.UseDeveloperExceptionPage();    else        app.UseMiddleware();    app.UseMvc();}