From 4b2e09dcfdde592df02a7d1480631374d51de364 Mon Sep 17 00:00:00 2001
From: DanielDiBe <daniel.diaz.benito@gmail.com>
Date: Fri, 27 Jul 2018 11:52:29 +0200
Subject: [PATCH] Fix issue #496: Cannot set headers after they are sent to the
 client on Node.js>10.1.0

---
 plugins/c9.vfs.server/vfs.server.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/c9.vfs.server/vfs.server.js b/plugins/c9.vfs.server/vfs.server.js
index 2cf51c04..e473f4aa 100644
--- a/plugins/c9.vfs.server/vfs.server.js
+++ b/plugins/c9.vfs.server/vfs.server.js
@@ -138,7 +138,8 @@ function plugin(options, imports, register) {
             req.on("close", function() {
                 done = true;
                 cancel();
-                res.json({}, 0, 500);
+                if(!res.headersSent)
+                    res.json({}, 0, 500);
             });
         }
     ]);