在RC1中，我会这样做:
[HttpPost]
public IActionResult Post([FromBody]string something)
{
try{
// ...
}
catch(Exception e)
{
return new HttpStatusCodeResult((int)HttpStatusCode.InternalServerError);
}
}
在RC2中，不再有HttpStatusCodeResult，也没有什么我可以找到，让我返回一个500类型的IActionResult。
现在的方法与我要求的完全不同吗?我们在控制器代码中不再尝试捕获了吗?我们只是让框架向API调用者抛出一个通用的500异常吗?对于开发，我如何才能看到确切的异常堆栈?
当前回答
目前(1.1)更好的处理方法是在Startup.cs的Configure()中执行:
app.UseExceptionHandler("/Error");
这将执行/Error的路由。这将使您不必为编写的每个操作添加try-catch块。
当然，你需要添加一个类似这样的ErrorController:
[Route("[controller]")]
public class ErrorController : Controller
{
[Route("")]
[AllowAnonymous]
public IActionResult Get()
{
return StatusCode(StatusCodes.Status500InternalServerError);
}
}
更多信息请点击这里。
如果您想要获得实际的异常数据，可以在return语句之前将其添加到上面的get()中。
// Get the details of the exception that occurred
var exceptionFeature = HttpContext.Features.Get<IExceptionHandlerPathFeature>();
if (exceptionFeature != null)
{
// Get which route the exception occurred at
string routeWhereExceptionOccurred = exceptionFeature.Path;
// Get the exception that occurred
Exception exceptionThatOccurred = exceptionFeature.Error;
// TODO: Do something with the exception
// Log it with Serilog?
// Send an e-mail, text, fax, or carrier pidgeon? Maybe all of the above?
// Whatever you do, be careful to catch any exceptions, otherwise you'll end up with a blank page and throwing a 500
}
以上片段摘自Scott Sauber的博客。
其他回答
对于API响应(使用net core)，我已经尝试过了，似乎工作得很好:
var err = Content(JsonConvert.SerializeObject(response, SerializerSettings), "application/x-javascript", contentEncoding: System.Text.Encoding.UTF8);
err.StatusCode = StatusCodes.Status500InternalServerError;
return err;
您只需要首先创建一个响应对象，然后响应这个。这样做，我们可以保留内容类型、编码，并添加状态代码。
只是添加这个供将来参考，谁是卡在以及想要一个快速和简单的方法来做到这一点。
目前(1.1)更好的处理方法是在Startup.cs的Configure()中执行:
app.UseExceptionHandler("/Error");
这将执行/Error的路由。这将使您不必为编写的每个操作添加try-catch块。
当然，你需要添加一个类似这样的ErrorController:
[Route("[controller]")]
public class ErrorController : Controller
{
[Route("")]
[AllowAnonymous]
public IActionResult Get()
{
return StatusCode(StatusCodes.Status500InternalServerError);
}
}
更多信息请点击这里。
如果您想要获得实际的异常数据，可以在return语句之前将其添加到上面的get()中。
// Get the details of the exception that occurred
var exceptionFeature = HttpContext.Features.Get<IExceptionHandlerPathFeature>();
if (exceptionFeature != null)
{
// Get which route the exception occurred at
string routeWhereExceptionOccurred = exceptionFeature.Path;
// Get the exception that occurred
Exception exceptionThatOccurred = exceptionFeature.Error;
// TODO: Do something with the exception
// Log it with Serilog?
// Send an e-mail, text, fax, or carrier pidgeon? Maybe all of the above?
// Whatever you do, be careful to catch any exceptions, otherwise you'll end up with a blank page and throwing a 500
}
以上片段摘自Scott Sauber的博客。
对于aspnetcore-3.1，你也可以像下面这样使用Problem();
https://learn.microsoft.com/en-us/aspnet/core/web-api/handle-errors?view=aspnetcore-3.1
[Route("/error-local-development")]
public IActionResult ErrorLocalDevelopment(
[FromServices] IWebHostEnvironment webHostEnvironment)
{
if (webHostEnvironment.EnvironmentName != "Development")
{
throw new InvalidOperationException(
"This shouldn't be invoked in non-development environments.");
}
var context = HttpContext.Features.Get<IExceptionHandlerFeature>();
return Problem(
detail: context.Error.StackTrace,
title: context.Error.Message);
}
Microsoft.AspNetCore.Mvc的内置Problem()方法将返回一个基于RFC 7807的“问题细节”响应。NET Core 3.0及更高版本)。只要没有显式地设置其他状态，它将始终返回状态代码500。
[HttpPost]
public IActionResult Post([FromBody] string value)
{
try
{
// ...
}
catch (Exception ex)
{
return Problem(
//all parameters are optional:
//detail: "Error while processing posted data."; //an explanation, ex.Stacktrace, ...
//instance: "/city/London" //A reference that identifies the specific occurrence of the problem
//title: "An error occured." //a short title, maybe ex.Message
//statusCode: StatusCodes.Status504GatewayTimeout, //will always return code 500 if not explicitly set
//type: "http://example.com/errors/error-123-details" //a reference to more information
);
}
}
如果不设置任何参数，它将返回:
{
"type": "https://tools.ietf.org/html/rfc7231#section-6.6.1",
"title": "An error occured while processing your request.",
"status": 500,
"traceId": "|fadaed95-4d06eb16160e4996."
}
有关“问题详细信息”参数的更多信息: https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.problemdetails?view=aspnetcore-5.0
当你想在MVC .Net Core中返回JSON响应时，你也可以使用:
Response.StatusCode = (int)HttpStatusCode.InternalServerError;//Equals to HTTPResponse 500
return Json(new { responseText = "my error" });
这将返回JSON结果和HTTPStatus。我用它来返回结果到jQuery.ajax()。
