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?
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。
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