add getStream extension

extensions/getstream.go

@@ -0,0 +1,27 @@
+package extensions
+
+import (
+	"github.com/thesyncim/faye/message"
+	"github.com/thesyncim/faye/transport"
+)
+
+type GetStream struct {
+	UserID    string `json:"user_id,omitempty"`
+	ApiKey    string `json:"api_key,omitempty"`
+	Signature string `json:"signature,omitempty"`
+}
+
+func NewGetStream(apiKey string, signature string) GetStream {
+	return GetStream{
+		ApiKey:    apiKey,
+		Signature: signature,
+	}
+}
+
+func (gt GetStream) OutExtension(message *message.Message) {
+	if message.Channel == string(transport.Subscribe) {
+		//get useriID
+		gt.UserID = message.Subscription[1:]
+		message.Ext = gt
+	}
+}