check unref() is supported

unref() is added to node `0.9.1`+
TooTallNate · May 25, 2017 · fe2162e · fe2162e
1 parent 7858f43
commit fe2162e
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/agent.js b/agent.js
@@ -100,7 +100,9 @@ Agent.prototype.addRequest = function addRequest (req, host, port, localAddress)
       }
     } else {
       req.onSocket(socket);
-      socket.unref();
+      if (typeof socket.unref === 'function') {
+        socket.unref();
+      }
     }
   });
   sync = false;