added error handler for no network connection

Author: adnanrahic

lib/index.js

@@ -44,8 +44,15 @@ var Logsene = function (options) {
     options.type || 'winston_logsene',
     options.url)
   var self = this
-  this.logger.on('error', function (err) {
-    self.emit('error', err)
+  this.logger.on('error', function (e) {
+    const { err } = e
+
+    if (err.code === 'EAI_AGAIN') {
+      console.log(new Date().toISOString() + ` winston-logsene: cannot reach the receiver URL: ${err.url}, please check your network connection ...`)
+      return
+    }
+
+    self.emit('error', e)
   })
   this.logger.on('log', function (data) {
     self.logCount = self.logCount - data.count