利用中间件处理异常
IExceptionFilter有些异常捕捉不到,可以利用中间件进行补充
1、在Program.cs添加以下代码
#region 中间件处理异常 { app.UseStatusCodePagesWithReExecute("/Home/Error/{0}"); //只要不是200,都能进来 //拼装一个response输出 app.UseExceptionHandler(errorApp => { errorApp.Run(async context => { context.Response.StatusCode = 200; context.Response.ContentType = "text/html"; await context.Response.WriteAsync("<html lang='en'<body>\r\n"); await context.Response.WriteAsync("ERROR!<br><br>\r\n"); var exceptionHandlerPathFeature = context.Features.Get<IExceptionHandlerPathFeature>(); Console.WriteLine("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&"); Console.WriteLine($"{exceptionHandlerPathFeature?.Error.Message}"); Console.WriteLine("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&"); if(exceptionHandlerPathFeature?.Error is FileNotFoundException) { await context.Response.WriteAsync("File error thrown!<br><br>\r\n"); } await context.Response.WriteAsync("<a href='/'>Home</a><br>\r\n"); await context.Response.WriteAsync("</body></html>\r\n"); await context.Response.WriteAsync(new string(' ', 512)); }); }); } #endregion
IExceptionFilter没有捕捉到的异常都会进入到这边,如果没有IExceptionFilter,程序出现异常也会进入到这边