Add ensure string helper for nodes.

red/red.js

@@ -19,6 +19,7 @@ var nodes = require("./nodes");
 var library = require("./library");
 var comms = require("./comms");
 var log = require("./log");
+var utils = require("./utils");
 var fs = require("fs");
 var settings = null;
 var credentials = require("./nodes/credentials");
@@ -48,6 +49,7 @@ var RED = {
     events: events,
     log: log,
     comms: comms,
+    utils: utils,
     version: function () {
         var p = require(path.join(process.env.NODE_RED_HOME,"package.json"));
         if (fs.existsSync(path.join(process.env.NODE_RED_HOME,".git"))) {

red/utils.js

@@ -0,0 +1,31 @@
+/**
+ * Copyright 2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+function ensureString(o) {
+    if (Buffer.isBuffer(o)) {
+        return o.toString();
+    } else if (typeof o === "object") {
+        return JSON.stringify(o);
+    } else if (typeof o === "string") {
+        return o;
+    }
+    return ""+o;
+}
+
+module.exports = {
+    ensureString: ensureString,
+};
+