错误处理(将ex.Message发送给客户端)

问题描述

我有一个ASP.NET Core 1.0 Web API应用程序，试图弄清楚如果控制器调用的函数出错，则如何将异常消息传递给客户端.

I have an ASP.NET Core 1.0 Web API application and trying to figure out how to pass the exception message to the client if a function that my controller is calling errors out.

我尝试了很多事情，但是没有实现IActionResult.

I have tried so many things, but nothing implements IActionResult.

我不明白为什么这不是人们所需要的普通东西.如果真的没有解决办法，有人可以告诉我为什么吗?

I don't understand why this isn't a common thing that people need. If there truthfully is no solution can someone tell me why?

我确实使用HttpResponseException(HttpResponseMessage)看到了一些文档，但是为了使用它，我必须安装compat垫片.在Core 1.0中，有没有一种新的方式可以做到这些?

I do see some documentation out there using HttpResponseException(HttpResponseMessage), but in order to use this, I have to install the compat shim. Is there a new way of doing these things in Core 1.0?

这是我一直在尝试使用匀场片的方法，但是它不起作用:

Here is something I have been trying with the shim but it isn't working:

// GET: api/customers/{id}
[HttpGet("{id}", Name = "GetCustomer")]
public IActionResult GetById(int id)
{
    Customer c = _customersService.GetCustomerById(id);
    if (c == null)
    {
        var response = new HttpResponseMessage(HttpStatusCode.NotFound)
        {
            Content = new StringContent("Customer doesn't exist", System.Text.Encoding.UTF8, "text/plain"),
            StatusCode = HttpStatusCode.NotFound

        };

        throw new HttpResponseException(response);

        //return NotFound();
    }
    return new ObjectResult(c);
}

抛出HttpResponseException时，我在客户端上查找，但找不到内容中正在发送任何内容的消息.

When the HttpResponseException is thrown, I look on the client and can't find the message I am sending anything in the content.

推荐答案

这是一个简单的错误DTO类

Here is an simple error DTO class

public class ErrorDto
{
    public int Code {get;set;}
    public string Message { get; set; }

    // other fields

    public override string ToString()
    {
        return JsonConvert.SerializeObject(this);
    }
}

然后使用 ExceptionHandler 中间件:

            app.UseExceptionHandler(errorApp =>
            {
                errorApp.Run(async context =>
                {
                    context.Response.StatusCode = 500; // or another Status accordingly to Exception Type
                    context.Response.ContentType = "application/json";

                    var error = context.Features.Get<IExceptionHandlerFeature>();
                    if (error != null)
                    {
                        var ex = error.Error;

                        await context.Response.WriteAsync(new ErrorDto()
                        {
                            Code = <your custom code based on Exception Type>,
                            Message = ex.Message // or your custom message
                            // other custom data
                        }.ToString(), Encoding.UTF8);
                    }
                });
            });

这篇关于错误处理(将ex.Message发送给客户端)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！