From 773808209fabbd4bb71e710b4f95df252002859d Mon Sep 17 00:00:00 2001
From: William Dunne <wdunne1@pca.ac.uk>
Date: Sun, 1 Nov 2015 16:40:20 +0000
Subject: [PATCH] Allow cross-origin requests for example

For the sake of testing the websocket server, accepting cross-origin requests is useful - to allow usage of things like http://www.websocket.org/echo.html
---
 examples/echo/server.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/examples/echo/server.go b/examples/echo/server.go
index 8f18b3f..5d218d3 100644
--- a/examples/echo/server.go
+++ b/examples/echo/server.go
@@ -16,7 +16,11 @@ import (
 
 var addr = flag.String("addr", "localhost:8081", "http service address")
 
-var upgrader = websocket.Upgrader{} // use default options
+var upgrader = websocket.Upgrader{
+	CheckOrigin: func(r *http.Request) bool {
+        return true
+    },
+} // use default options, except origin. Allows cross-origin requests for testing.
 
 func echo(w http.ResponseWriter, r *http.Request) {
 	if r.URL.Path != "/" {