From 8f8d95670f7f34cff4e45b4df536642991cf8aa4 Mon Sep 17 00:00:00 2001
From: "J. Scott Elblein" <stardogg@gmail.com>
Date: Wed, 9 Sep 2020 23:02:25 -0500
Subject: [PATCH] Fix for connecting to container Cline

W/out these 2 lines you'll get the following error (or similar) while trying to connect to a container in portainer's web ui:

> WebSocket connection to 'wss://<domain>/portainer/api/websocket/exec?token=<token>=6&id=<id>&nodeName=docker-desktop' failed: Error during WebSocket handshake: Unexpected response code: 400
---
 portainer.subfolder.conf.sample | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/portainer.subfolder.conf.sample b/portainer.subfolder.conf.sample
index fafed86..6157ead 100644
--- a/portainer.subfolder.conf.sample
+++ b/portainer.subfolder.conf.sample
@@ -36,5 +36,7 @@ location ^~ /portainer/api/websocket/ {
     proxy_pass $upstream_proto://$upstream_app:$upstream_port;
 
     rewrite /portainer(.*) $1 break;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
     proxy_hide_header X-Frame-Options; # Possibly not needed after Portainer 1.20.0
 }