feat 接入Prometheus

Server/gateway/handler/ws_handler/manager.go

@@ -32,7 +32,23 @@ func (m *userManager) Delete(uid int32) {
 func (m *userManager) GetAll() map[int32]*Client {
 	m.RLock()
 	defer m.RUnlock()
-	return m.userMap
+
+	copyMap := make(map[int32]*Client, len(m.userMap))
+	for k, v := range m.userMap {
+		copyMap[k] = v
+	}
+	return copyMap
+}
+
+func (m *userManager) GetAllInterface() []interface{} {
+	m.RLock()
+	defer m.RUnlock()
+
+	r := make([]interface{}, 0)
+	for _, v := range m.userMap {
+		r = append(r, v)
+	}
+	return r
 }
 
 func (m *userManager) GetByUID(uid int32) *Client {