feat(protocol): allow override of dial func

reach/client/socketio/transport.go

@@ -0,0 +1,46 @@
+package socketio
+
+import (
+	"net"
+	"net/http"
+
+	"forge.cadoles.com/Pyxis/golang-socketio/transport"
+	"github.com/gorilla/websocket"
+)
+
+type Transport struct {
+	dial DialFunc
+	ws   *transport.WebsocketTransport
+}
+
+// Connect implements transport.Transport.
+func (t *Transport) Connect(url string) (conn transport.Connection, err error) {
+	if t.dial == nil {
+		return t.ws.Connect(url)
+	} else {
+		dialer := websocket.Dialer{
+			NetDial: func(network, addr string) (net.Conn, error) {
+				return t.dial(network, addr)
+			},
+		}
+
+		socket, _, err := dialer.Dial(url, t.ws.RequestHeader)
+		if err != nil {
+			return nil, err
+		}
+
+		return transport.NewWebsocketConnection(socket, t.ws), nil
+	}
+}
+
+// HandleConnection implements transport.Transport.
+func (t *Transport) HandleConnection(w http.ResponseWriter, r *http.Request) (conn transport.Connection, err error) {
+	return t.ws.HandleConnection(w, r)
+}
+
+// Serve implements transport.Transport.
+func (t *Transport) Serve(w http.ResponseWriter, r *http.Request) {
+	t.ws.Serve(w, r)
+}
+
+var _ transport.Transport = &Transport{}