add printer get printers

utils/utils.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"git.rosy.net.cn/jx-print/globals"
 	"git.rosy.net.cn/jx-print/model"
 	"github.com/dchest/captcha"
@@ -148,3 +149,11 @@ func TryUnmarshalUseNumber(data []byte, result interface{}) error {
 	d.UseNumber()
 	return d.Decode(result)
 }
+
+func BuildErr(errs []error) (err error) {
+	var errStr = strings.Builder{}
+	for _, v := range errs {
+		errStr.WriteString(v.Error())
+	}
+	return fmt.Errorf(errStr.String())
+}