jsonrpc.js file && batch polling

lib/httpsync.js

@@ -38,7 +38,8 @@ HttpSyncProvider.prototype.send = function (payload) {
     request.send(JSON.stringify(payload));
     
     // check request.status
-    return request.responseText;
+    var result = request.responseText;
+    return JSON.parse(result);
 };
 
 module.exports = HttpSyncProvider;