增强异常接口

Author: yumaojun03

exception/base.go

@@ -6,19 +6,15 @@ import "fmt"
 type APIException interface {
 	error
 	ErrorCode() int
+	WithMeta(m interface{})
 	Meta() interface{}
+	WithData(d interface{})
 	Data() interface{}
 	Is(code int) bool
 	Namespace() string
 	Reason() string
 }
 
-// WithAPIException 携带元信息的异常
-type WithAPIException interface {
-	APIException
-	WithMeta(m interface{}) APIException
-}
-
 func newException(namespace Namespace, code int, format string, a ...interface{}) *exception {
 	return &exception{
 		namespace: namespace,
@@ -48,18 +44,16 @@ func (e *exception) ErrorCode() int {
 }
 
 // WithMeta 携带一些额外信息
-func (e *exception) WithMeta(m interface{}) APIException {
+func (e *exception) WithMeta(m interface{}) {
 	e.meta = m
-	return e
 }
 
 func (e *exception) Meta() interface{} {
 	return e.meta
 }
 
-func (e *exception) WithData(d interface{}) APIException {
+func (e *exception) WithData(d interface{}) {
 	e.data = d
-	return e
 }
 
 func (e *exception) Data() interface{} {

exception/exception.go

@@ -4,7 +4,7 @@ import "fmt"
 
 // NewAPIException 创建一个API异常
 // 用于其他模块自定义异常
-func NewAPIException(namespace string, code int, reason, format string, a ...interface{}) WithAPIException {
+func NewAPIException(namespace string, code int, reason, format string, a ...interface{}) APIException {
 	// 0表示正常状态, 但是要排除变量的零值
 	if code == 0 {
 		code = -1

http/response/data.go

@@ -8,6 +8,7 @@ type Data struct {
 	Reason    string      `json:"reason,omitempty"`    // 异常原因
 	Message   string      `json:"message,omitempty"`   // 关于这次响应的说明信息
 	Data      interface{} `json:"data,omitempty"`      // 返回的具体数据
+	Meta      interface{} `json:"meta,omitempty"`      // 数据meta
 }
 
 // NewData new实例

http/response/send.go

@@ -16,13 +16,15 @@ func Failed(w http.ResponseWriter, err error) {
 		ns       string
 		reason   string
 		data     interface{}
+		meta     interface{}
 	)
 
 	switch t := err.(type) {
 	case exception.APIException:
 		errCode = t.ErrorCode()
 		reason = t.Reason()
 		data = t.Data()
+		meta = t.Meta()
 		ns = t.Namespace()
 	default:
 		errCode = exception.UnKnownException
@@ -42,6 +44,7 @@ func Failed(w http.ResponseWriter, err error) {
 		Reason:    reason,
 		Message:   err.Error(),
 		Data:      data,
+		Meta:      meta,
 	}
 
 	// set response heanders