add url encoding

client/main.js

@@ -15,7 +15,7 @@ var Uploader = {
 
     getFile: function(fileName, callback) {
 	var xhr = new XMLHttpRequest();
-	xhr.open('GET', '/room/'+this.roomId+'/'+fileName, true);
+	xhr.open('GET', '/room/'+this.roomId+'/'+encodeURIComponent(fileName), true);
 	xhr.responseType = 'arraybuffer';
 	xhr.onload = callback;
 	xhr.send();