Moved Upgrader variable to package level.

examples/autobahn/server.go

@@ -26,15 +26,17 @@ import (
 	"unicode/utf8"
 )
 
+var upgrader = websocket.Upgrader{
+	ReadBufferSize:  4096,
+	WriteBufferSize: 4096,
+	CheckOrigin: func(r *http.Request) bool {
+		return true
+	},
+}
+
 // echoCopy echoes messages from the client using io.Copy.
 func echoCopy(w http.ResponseWriter, r *http.Request, writerOnly bool) {
-	u := websocket.Upgrader{
-		ReadBufferSize:  4096,
-		WriteBufferSize: 4096,
-		CheckOrigin: func(r *http.Request) bool {
-			return true
-		}}
-	conn, err := u.Upgrade(w, r, nil)
+	conn, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		log.Println("Upgrade:", err)
 		http.Error(w, "Bad request", 400)
@@ -93,13 +95,7 @@ func echoCopyFull(w http.ResponseWriter, r *http.Request) {
 // echoReadAll echoes messages from the client by reading the entire message
 // with ioutil.ReadAll.
 func echoReadAll(w http.ResponseWriter, r *http.Request, writeMessage bool) {
-	u := websocket.Upgrader{
-		ReadBufferSize:  4096,
-		WriteBufferSize: 4096,
-		CheckOrigin: func(r *http.Request) bool {
-			return true
-		}}
-	conn, err := u.Upgrade(w, r, nil)
+	conn, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		log.Println("Upgrade:", err)
 		return

examples/chat/conn.go

@@ -25,6 +25,11 @@ const (
 	maxMessageSize = 512
 )
 
+var upgrader = websocket.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 1024,
+}
+
 // connection is an middleman between the websocket connection and the hub.
 type connection struct {
 	// The websocket connection.
@@ -89,10 +94,7 @@ func serveWs(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "Method not allowed", 405)
 		return
 	}
-	u := websocket.Upgrader{
-		ReadBufferSize:  1024,
-		WriteBufferSize: 1024}
-	ws, err := u.Upgrade(w, r, nil)
+	ws, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		if _, ok := err.(websocket.HandshakeError); !ok {
 			log.Println(err)

examples/filewatch/main.go

@@ -35,6 +35,10 @@ var (
 	addr      = flag.String("addr", ":8080", "http service address")
 	homeTempl = template.Must(template.New("").Parse(homeHTML))
 	filename  string
+	upgrader  = websocket.Upgrader{
+		ReadBufferSize:  1024,
+		WriteBufferSize: 1024,
+	}
 )
 
 func readFileIfModified(lastMod time.Time) ([]byte, time.Time, error) {
@@ -107,10 +111,7 @@ func writer(ws *websocket.Conn, lastMod time.Time) {
 }
 
 func serveWs(w http.ResponseWriter, r *http.Request) {
-	u := websocket.Upgrader{
-		ReadBufferSize:  1024,
-		WriteBufferSize: 1024}
-	ws, err := u.Upgrade(w, r, nil)
+	ws, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		if _, ok := err.(websocket.HandshakeError); !ok {
 			log.Println(err)