Google Cloud Platform Node.js Library - node.js

Question

I am creating a google function. However, when I try to deploy to Google Cloud Platform, I am getting this error
ERROR: (gcloud.beta.functions.deploy) OperationError: code=3, message=Function load error: Code in file index.js can't be loaded.
Did you list all required modules in the package.json dependencies?
Detailed stack trace: Error: Cannot find module 'request'
How do I upload/install the 'request' library in google cloud platform?
Code Snippet
'use strict';
const https = require('https');
const host = 'https://www.example.com';
const clientId = 'qpopMIGtVdeIdVk3oEtr2LGbn8vTeTWz';
const clientSecret = 'eUnsWQ8y3AuiFHJu';
const grant_type = 'client_credentials';
const resource = 'b.microsoft.com/4fa4b4a7-d34f-49af-8781-c8b39f0cf770';
const request = require("request");
exports.oauthtoken = (req, res) => {
// Call the Apigee API
callGetOAuthToken().then((output) => {
// Return the results from the APigee to DialogFlow
res.setHeader('Content-Type', 'application/json');
res.send(JSON.stringify({ 'speech': output, 'displayText': output }));
}).catch((error) => {
// If there is an error let the user know
res.setHeader('Content-Type', 'application/json');
res.send(JSON.stringify({ 'speech': error, 'displayText': error }));
});
};
function callGetOAuthToken () {
return new Promise((resolve, reject) => {
let path = '/customers/v1/accesstoken';
var authHeader = Buffer.from(clientId + ':' + clientSecret).toString('base64');
var post_options = {
url: host + path,
method: 'POST',
headers:
{
'Content-Type': 'application/x-www-form-urlencoded',
'Authorization': 'Basic ' + authHeader,
'grant_type':grant_type
}
};
// Make the HTTP request to get the weather
request(post_options, function(err, res, body) {
let output = JSON.parse(body);
console.log(output);
resolve(output);
});
});
}
-Alan-

Answer 1

Read through the Google Cloud documentation regarding dependencies:
https://cloud.google.com/functions/docs/writing/dependencies
List the 'request' module as a dependency in your package.json file if using the gcloud CLI.
Or, run 'npm install --save request' in the folder containing your cloud function and upload your pre-installed dependencies as part of your ZIP file.