add: user update-remark api

* add DecodeWithCommonError function
* add UpdateRemark method

util/error.go

@@ -1,7 +1,25 @@
 package util
 
+import (
+	"encoding/json"
+	"fmt"
+)
+
 // CommonError 微信返回的通用错误json
 type CommonError struct {
 	ErrCode int64  `json:"errcode"`
 	ErrMsg  string `json:"errmsg"`
 }
+
+// DecodeWithCommonError 将返回值按照CommonError解析
+func DecodeWithCommonError(response []byte, apiName string) (err error) {
+	var commError CommonError
+	err = json.Unmarshal(response, &commError)
+	if err != nil {
+		return
+	}
+	if commError.ErrCode != 0 {
+		return fmt.Errorf("%s Error , errcode=%d , errmsg=%s", apiName, commError.ErrCode, commError.ErrMsg)
+	}
+	return nil
+}