grpc 实现统一格式的body响应

我们写rest api时，统一响应大多是这样的

{
 "err": 0,
 "msg": "参数错误",//有错误时非空
 "data" : {//没错误时才存在
        ...
 }
}

在grpc项目中有些许差异

func Admin2Resetpasswd(ctx context.Context, in *pb.Admin2ResetpasswdRequest) (*pb.Admin2ResetpasswdResponse, error) {
	if in.AdminId == in.ToAid {
		return nil, status.Error(codes.FailedPrecondition, "不能操作自己账号")
...

grpc有十多种状态编码

	`"OK"`: OK,
	`"CANCELLED"`:/* [sic] */ Canceled,
	`"UNKNOWN"`:             Unknown,
	`"INVALID_ARGUMENT"`:    InvalidArgument,
	`"DEADLINE_EXCEEDED"`:   DeadlineExceeded,
	`"NOT_FOUND"`:           NotFound,
	`"ALREADY_EXISTS"`:      AlreadyExists,
	`"PERMISSION_DENIED"`:   PermissionDenied,
	`"RESOURCE_EXHAUSTED"`:  ResourceExhausted,
	`"FAILED_PRECONDITION"`: FailedPrecondition,
	`"ABORTED"`:             Aborted,
	`"OUT_OF_RANGE"`:        OutOfRange,
	`"UNIMPLEMENTED"`:       Unimplemented,
	`"INTERNAL"`:            Internal,
	`"UNAVAILABLE"`:         Unavailable,
	`"DATA_LOSS"`:           DataLoss,
	`"UNAUTHENTICATED"`:     Unauthenticated,

客户端解析

ctx, _ := context.WithTimeout(context.Background(), time.Second)
r, err := c.SayHello(ctx, &pb.HelloRequest{Name: "tony")})
if err != nil {
    errStatus := status.Convert(err)
    log.Printf("SayHello return error: code: %d, msg: %s\n", errStatus.Code(), errStatus.Message())
}
log.Printf("Greeting: %s", r.GetMessage())

参考

https://blog.csdn.net/bigwhite20xx/article/details/120499996