fix: recover when goroutine panic that will kill main program (#692)

* fix #684

recover when goroutine panic that will kill main program

* Update util.go

Co-authored-by: Yang Luo <hsluoyz@qq.com>

util/util.go

@@ -0,0 +1,38 @@
+// Copyright 2022 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package util
+
+import (
+	"fmt"
+
+	"github.com/astaxie/beego/logs"
+)
+
+func SafeGoroutine(fn func()) {
+	var err error
+	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				var ok bool
+				err, ok = r.(error)
+				if !ok {
+					err = fmt.Errorf("%v", r)
+				}
+				logs.Error("goroutine panic: %v", err)
+			}
+		}()
+		fn()
+	}()
+}