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
从我所看到的ControllerBase类中有helper方法。只需使用StatusCode方法:
[HttpPost]
public IActionResult Post([FromBody] string something)
{
//...
try
{
DoSomething();
}
catch(Exception e)
{
LogException(e);
return StatusCode(500);
}
}
你也可以使用StatusCode重载(int StatusCode, object value)来协商内容。
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()。
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。
如何创建一个自定义ObjectResult类，表示一个内部服务器错误，就像一个OkObjectResult? 您可以在自己的基类中放置一个简单的方法，这样您就可以轻松地生成InternalServerError并返回它，就像您做Ok()或BadRequest()一样。
[Route("api/[controller]")]
[ApiController]
public class MyController : MyControllerBase
{
[HttpGet]
[Route("{key}")]
public IActionResult Get(int key)
{
try
{
//do something that fails
}
catch (Exception e)
{
LogException(e);
return InternalServerError();
}
}
}
public class MyControllerBase : ControllerBase
{
public InternalServerErrorObjectResult InternalServerError()
{
return new InternalServerErrorObjectResult();
}
public InternalServerErrorObjectResult InternalServerError(object value)
{
return new InternalServerErrorObjectResult(value);
}
}
public class InternalServerErrorObjectResult : ObjectResult
{
public InternalServerErrorObjectResult(object value) : base(value)
{
StatusCode = StatusCodes.Status500InternalServerError;
}
public InternalServerErrorObjectResult() : this(null)
{
StatusCode = StatusCodes.Status500InternalServerError;
}
}
如果你需要一个人来回应，你可以打电话
return StatusCode(StatusCodes.Status500InternalServerError, responseObject);
这将返回一个500和响应对象…
