NodeJS client connection to Datastore

[Giancarlo C.]

Hi everybody, I'm new in this kind of platform (cloud) and I have a problem with App Engine.

I have the following project structure in App Engine:

- Root

  - nodejs-docs-samples

  - src

    - be-nodejs-piloto

       - node_modules

       - api.js (api post uri)

       - app.js (main)

       - app.yaml

       - datastore-quickstart.json

       - package-lock.json

       - package.json

    - vibrant-tree-191664

app.yaml (content)

runtime: nodejs

env: flex

manual_scaling:

  instances: 1

resources:

  cpu: 1

  memory_gb: 0.5

  disk_size_gb: 10

api.js (content)

'use strict';

// Load libs.

var express  = require('express');

var router   = express.Router();

var path = require('path');

const Datastore = require('@google-cloud/datastore'); // Imports the Google Cloud client lib

// Your Google Cloud Platform project ID

const projectId   = 'datastore-quickstart-191515';

const keyFilename = '/home/testcloud99/src/be-nodejs-piloto/datastore-quickstart-5672f2cde8ca.json';

console.log('keyFilename:' + keyFilename);

// Creates a client

const datastore = new Datastore({

    projectId: projectId,

    keyFilename: keyFilename

  });

router.route('/api/piloto')

    .post(function (req, res)

    {

    console.log('method: POST');

        // Read params

        var pMsgId   = req.body.msgId;

        const query = datastore.createQuery('MyEntity');
        query.filter('msgId', '=', pMsgId);

        // exec query

        datastore

            .runQuery(query)

            .then(results => {

                //OK

                return res.status(200).jsonp({

                    "piloto":

                    {

                        "code" : 0,

                        "desc" : "ok",

                    }

                });

        })

        .catch(err => {

            console.error('ERROR:', err);

            return res.status(200).jsonp({

                "piloto":

                {

                    "code" : 1,

                    "desc" : "error",

                    "errorMessage" : err.message

                }

                });

        });

    });

module.exports = router;

So, when I send a POST message (using soapUI), I get this response:

{"piloto": {

   "code": 1,

   "desc": "error",

   "errorMessage": "ENOENT: no such file or directory, open '/home/megagecs/src/be-nodejs-piloto/datastore-quickstart-5672f2cde8ca.json'"

}}

I guess App Engine isn't recognizing that JSON file but I don't know why. Any kind of configuration that should be done?

Hope you can help me.

Regards.