Passing connection between two files - azure functions

Question

I have a server.js file inside a connections folder that I'm trying to use and have all my azure functions reference so that it doesn't instantiate a connection after every API call. I'm having issues exporting the connection and importing it correctly in my azure functions. Is this not possible. If it is, what am I doing wrong? Appreciate the help!

server.js

const redis = require('redis');
var mongoose = require('mongoose');
const redis = require('redis');

const client = redis.createClient(6380, process.env.REDISCACHEHOSTNAME + '.redis.cache.windows.net', {
  auth_pass: process.env.REDISCACHEKEY,
  tls: { servername: process.env.REDISCACHEHOSTNAME + '.redis.cache.windows.net' }
});

module.exports = { client };

top of azure function file importing connection

const redis = require('redis');

var redisConnection = require("../connections/server")


console.log("THE CLIENT IS " + redisConnection.client.connected);

Error: client is not defined

caiyi Ju · Accepted Answer · 2020-06-02 08:14:46Z

Yes, it is possible. I have tested this on Azure portal. I created two http trigger functions named HttpTrigger1 and HttpTrigger2.

HttpTrigger1 function

HttpTrigger2 function

It seems that your code is correct, please check your function project directory structure, mine is

You can test it locally, here are my code for your reference:

The server.js file

const redis = require('redis');

const client = redis.createClient(6380, 'test.redis.cache.windows.net', 
        {auth_pass: 'XXXX=', tls: {servername: 'test.redis.cache.windows.net'}});

module.exports = { client };

The function code

const redis = require('redis');

var redisConnection = require("../connections/server")

module.exports = async function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');
    context.log("THE CLIENT IS " + redisConnection.client.connected);
    context.res = {
        // status: 200, /* Defaults to 200 */
        body: "THE CLIENT IS " + redisConnection.client.connected
    };

};

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