SyntaxError: Unexpected token ...

[eliassal]

Description

I have an application supposed to run in docker container (I am new to node apps) along with redis container and it uses the redis client. The code is

var express = require('express');
var app = express();
var redis = require('redis');

var client = redis.createClient(6379, 'redis');
client.on("error", function (err) {
    console.error("Redis error", err);
});

app.get('/', function (req, res) {
    res.redirect('/index.html');
});

app.get('/json', function (req, res) {
    client.hlen('wallet', function (err, coins) {
        client.get('hashes', function (err, hashes) {
            var now = Date.now() / 1000;
            res.json( {
                coins: coins,
                hashes: hashes,
                now: now
            });
        });
    });
});

app.use(express.static('files'));

var server = app.listen(80, function () {
console.log('WEBUI running on port 80');

but when I run both containers, redis is up and running but the one that has the node app exits with the error

TypeError: client.hlen is not a function
at C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\webui.js:15:12
at Layer.handle [as handle_request] (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\route.js:144:13)
at Route.dispatch (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\route.js:114:3)
at Layer.handle [as handle_request] (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\layer.js:95:5)
at C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\index.js:284:15
at Function.process_params (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\index.js:346:12)
at next (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\index.js:280:10)
at expressInit (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\middleware\init.js:40:5)
at Layer.handle [as handle_request] (C:\Projects\Docker\Kubernetes\Container.Training\orchestration-workshop\dockercoins\webui\node_modules\express\lib\router\layer.js:95:5)

[JatSh1804]

var express = require('express');
var app = express();
var redis = require('redis');

var client =async  ()=>{return await redis.createClient(6379, 'redis');}
client.on("error", function (err) {
    console.error("Redis error", err);
});
client.connect();

app.get('/', function (req, res) {
    res.redirect('/index.html');
});

app.get('/json', async function (req, res) {
   await client.hlen('wallet', function (err, coins) {
        client.get('hashes', function (err, hashes) {
            var now = Date.now() / 1000;
            res.json( {
                coins: coins,
                hashes: hashes,
                now: now
            });
        });
    });
});

You are accessing hlen before even initiating the client connection, need to use connect() to initate the connection.
You can refer #235 for accessing the result.
This should work