From 752b78ce05ddd76ab69dfda6589b200e090cb1a3 Mon Sep 17 00:00:00 2001
From: saidimu apale <saidimu@gmail.com>
Date: Wed, 1 Oct 2014 13:35:42 -0400
Subject: [PATCH] Websockets support

Added `Upgrade` and `Connection` headers to the template to allow nginx to [upgrade a request](http://nginx.com/blog/websocket-nginx/).

```
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
```

These headers are only added if a `WEBSOCKETS` environment variable is defined.
---
 nginx.tmpl | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/nginx.tmpl b/nginx.tmpl
index 2f1eac4..e09a7a5 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -40,6 +40,7 @@ upstream {{ $host }} {
 {{ end }}
 }
 
+{{ range $index, $value := $containers }}
 server {
 	gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
 
@@ -54,7 +55,16 @@ server {
 
 		# HTTP 1.1 support
 		proxy_http_version 1.1;
-		proxy_set_header Connection "";
+
+		{{ /* Only add the websockets Upgrade headers if a WEBSOCKETS env var is set. */}}
+                {{ if $value.Env.WEBSOCKETS }}
+	                proxy_set_header Upgrade $http_upgrade;
+	                proxy_set_header Connection "upgrade";
+                {{ else }}
+	                proxy_set_header Connection "";
+                {{ end }}
+                
 	}
+{{ end }}
 }
 {{ end }}