Errors

    Error in errors pacakge implements GRPCStatus() interface,The conversion between grpc and HTTP error code is realized, and the business reason is returned through errorinfo.

    To generate code with protoc.

    1. protoc --proto_path=. \
    2.          --proto_path=./third_party \
    3.          --go_out=paths=source_relative:. \
    4.          --go-errors_out=paths=source_relative:. \
    5.          $(API_PROTO_FILES)

    After successful execution, will be generated in the api/helloworld directory a go file,The code is as follows.

    1. package helloworld
    3. import (
    4.     fmt "fmt"
    5. )
    8. // is compatible with the kratos package it is being compiled against.
    9. const _ = errors.SupportPackageIsVersion1
    11. func IsUserNotFound(err error) bool {
    12.     if err == nil {
    13.         return false
    14.     }
    15.     e := errors.FromError(err)
    16.     return e.Reason == ErrorReason_USER_NOT_FOUND.String() && e.Code == 404
    17. }
    20. }
    22. func IsContentMissing(err error) bool {
    23.     if err == nil {
    24.         return false
    25.     }
    26.     e := errors.FromError(err)
    27.     return e.Reason == ErrorReason_CONTENT_MISSING.String() && e.Code == 400
    28. }
    30. func ErrorContentMissing(format string, args ...interface{}) *errors.Error {
    31.     return errors.New(400, ErrorReason_CONTENT_MISSING.String(), fmt.Sprintf(format, args...))