错误处理

    • 业务处理正常

    • 业务处理异常

      1.   {
      2.     "code": 10001,
      3.     "msg": "参数错误"
      4.   }
    1. curl -X POST \
    2.   http://127.0.0.1:8888/user/login \
    3.   -H 'content-type: application/json' \
    4.   -d '{
    5.     "username":"1",
    6.     "password":"123456"
    7. }'

    接下来我们将其以json格式进行返回

    • 首先在common中添加一个baseerror.go文件，并填入代码

      1.   $ cd common
      2.   $ mkdir errorx&&cd errorx
      3.   $ vim baseerror.go
      1.   package errorx
      3.   const defaultCode = 1001
      5.   type CodeError struct {
      6.       Code int    `json:"code"`
      7.       Msg  string `json:"msg"`
      8.   }
      10.       Code int    `json:"code"`
      11.       Msg  string `json:"msg"`
      12.   }
      14.   func NewCodeError(code int, msg string) error {
      15.       return &CodeError{Code: code, Msg: msg}
      16.   }
      18.   func NewDefaultError(msg string) error {
      19.       return NewCodeError(defaultCode, msg)
      20.   }
      22.   func (e *CodeError) Error() string {
      23.       return e.Msg
      24.   }
      26.   func (e *CodeError) Data() *CodeErrorResponse {
      27.       return &CodeErrorResponse{
      28.           Code: e.Code,
      29.           Msg:  e.Msg,
      30.       }
      31.   }

    • 开启自定义错误

      1.   $ vim service/user/cmd/api/user.go
      1.   func main() {
      2.       flag.Parse()
      4.       conf.MustLoad(*configFile, &c)
      6.       ctx := svc.NewServiceContext(c)
      7.       server := rest.MustNewServer(c.RestConf)
      8.       defer server.Stop()
      10.       handler.RegisterHandlers(server, ctx)
      12.       // 自定义错误
      13.       httpx.SetErrorHandler(func(err error) (int, interface{}) {
      14.           switch e := err.(type) {
      15.           case *errorx.CodeError:
      16.               return http.StatusOK, e.Data()
      17.           default:
      18.               return http.StatusInternalServerError, nil
      19.           }
      20.       })
      22.       fmt.Printf("Starting server at %s:%d...\n", c.Host, c.Port)
      23.       server.Start()
      24.   }

    • 重启服务验证

      1.   HTTP/1.1 200 OK
      2.   Content-Type: application/json
      3.   Date: Tue, 09 Feb 2021 06:47:29 GMT
      4.   Content-Length: 40