Added promise sample.

functions/background/index.js

@@ -0,0 +1,49 @@
+// Copyright 2016, Google, Inc.
+// 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.
+
+'use strict';
+
+// [START helloworld]
+/**
+ * Background Cloud Function.
+ *
+ * @param {Object} context Cloud Function context.
+ * @param {Object} data Request data, provided by a trigger.
+ */
+exports.helloworld = function helloworld (context, data) {
+  if (data.message === undefined) {
+    // This is an error case, "message" is required
+    context.failure('No message defined!');
+  } else {
+    // Everything is ok
+    console.log(data.message);
+    context.success();
+  }
+};
+// [END helloworld]
+
+// [START helloPromise]
+var request = require('request-promise');
+
+/**
+ * Background Cloud Function that returns a Promise.
+ *
+ * @param {Object} data Request data, provided by a trigger.
+ * @returns {Promise}
+ */
+exports.helloPromise = function helloPromise (data) {
+  return request({
+    uri: data.endpoint
+  });
+};
+// [END helloPromise]

functions/background/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "nodejs-docs-samples-functions",
+  "description": "Node.js samples found on https://cloud.google.com",
+  "version": "0.0.1",
+  "private": true,
+  "license": "Apache Version 2.0",
+  "author": "Google Inc.",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git"
+  },
+  "dependencies": {
+    "request-promise": "^3.0.0"
+  }
+}

functions/pubsub/index.js

@@ -31,7 +31,7 @@ var pubsub = gcloud.pubsub();
  * @param {string} data.topic Topic name on which to publish.
  * @param {string} data.message Message to publish.
  */
-function publish (context, data) {
+exports.publish = function publish (context, data) {
   try {
     if (!data.topic) {
       throw new Error('Topic not provided. Make sure you have a ' +
@@ -63,7 +63,7 @@ function publish (context, data) {
     console.error(err);
     return context.failure(err.message);
   }
-}
+};
 
 /**
  * Triggered from a message on a Pub/Sub topic.
@@ -74,13 +74,10 @@ function publish (context, data) {
  * @param {Object} data Request data, in this case an object provided by the Pub/Sub trigger.
  * @param {Object} data.message Message that was published via Pub/Sub.
  */
-function subscribe (context, data) {
+exports.subscribe = function subscribe (context, data) {
   // We're just going to log the message to prove that it worked!
   console.log(data.message);
 
   // Don't forget to call success!
   context.success();
-}
-
-exports.publish = publish;
-exports.subscribe = subscribe;
+};