- refactor platform apis.

platform/elmapi/callback.go

@@ -1,5 +1,12 @@
 package elmapi
 
+import (
+	"encoding/json"
+	"fmt"
+
+	"git.rosy.net.cn/baseapi/platform/common"
+)
+
 const (
 	OrderValid        = 10
 	MerchantValid     = 12
@@ -25,5 +32,24 @@ type ELMCallbackMsg struct {
 }
 
 var (
-	ELMResponseOK = &ELMCallbackResponse{"ok"}
+	SuccessResponse = &ELMCallbackResponse{"ok"}
 )
+
+func (e *ELMAPI) unmarshalData(data []byte, msg interface{}) (callbackResponse *ELMCallbackResponse) {
+	err := json.Unmarshal(data, msg)
+	if err != nil {
+		return &ELMCallbackResponse{
+			Message: fmt.Sprintf(common.CBErrMsgUnmarshal, data, err),
+		}
+	}
+	return nil
+}
+
+func (e *ELMAPI) GetMsgFromData(data []byte) (msg *ELMCallbackMsg, callbackResponse *ELMCallbackResponse) {
+	msg = new(ELMCallbackMsg)
+	callbackResponse = e.unmarshalData(data, msg)
+	if callbackResponse != nil {
+		return nil, callbackResponse
+	}
+	return msg, nil
+}