Question

Unable to connect to the node app

Posted on April 11, 2020
Deployment Node.js
Asked by cbonnaud

Hi guys, I’m kinda new to all the stuff related to deployment, servers, etc. I followed tutorials explaining how to setup a Linux 18 server with nginx, and the example worked properly.

However, when I redirect the proxy to my application and then try to access it via a browser, I have a 502 error.

Here’s the code of my node app :

const https = require("https");
const express = require("express");
const app = express();
const dotenv = require("dotenv");
const mongoose = require("mongoose");
const cors = require("cors");
const mustacheExpress = require("mustache-express");
dotenv.config();

// Connect to DB
mongoose.connect(process.env.DB_CONNECT, { useNewUrlParser: true }, () => {
  console.log("connected to DB !");
});

app.use(function (req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept"
  );
  next();
});

// Middleware
app.use(express.json());

// Templating
app.engine("html", mustacheExpress());

//import routes
const authRoute = require("./routes/auth");
const devisRoute = require("./routes/devis");
const messageRoute = require("./routes/message");
const actuRoute = require("./routes/actu");

//Routes middlewares
app.use("/api/user", authRoute);

app.use("/api/sendDevis", devisRoute);

app.use("/api/message", messageRoute);

app.use("/api/actu", actuRoute);

// app.get("/", (req, res) => {
//   return res.status(200).json({ status: "OK" });
// });

app.use(express.static("../front-end/dist/natan-website"));

app.get("/", function (req, res, next) {
  res.redirect("/");
});


app.listen(3000, () => console.log("Server is running !"));

Does anyone have an idea of the mistake I’ve made ?

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cbonnaud • April 11, 2020

Accepted Answer

So after some research, my code was not correct, middlewares were missing. Here’s the good one :

var express = require(‘express’); var app = express(); // create our app w/ express var morgan = require(‘morgan’); // log requests to the console (express4) var bodyParser = require(‘body-parser’); // pull information from HTML POST (express4) var methodOverride = require(‘method-override’); // simulate DELETE and PUT (express4) const mongoose = require(“mongoose”); const dotenv = require(“dotenv”); const mustacheExpress = require(“mustache-express”);

dotenv.config();

// configuration =================

mongoose.connect(process.env.DB_CONNECT, { useNewUrlParser: true }, () => { console.log(“connected to DB !”); });

app.use(express.static(“…/front-end/dist/website”));
app.use(morgan(‘dev’)); // log every request to the console app.use(bodyParser.urlencoded({‘extended’:‘true’})); // parse application/x-www-form-urlencoded app.use(bodyParser.json()); // parse application/json app.use(bodyParser.json({ type: ‘application/vnd.api+json’ })); // parse application/vnd.api+json as json app.use(methodOverride());

// Middleware app.use(express.json());

// Templating app.engine(“html”, mustacheExpress());

//import routes const authRoute = require(“./routes/auth”); const devisRoute = require(“./routes/devis”); const messageRoute = require(“./routes/message”); const actuRoute = require(“./routes/actu”);

//Routes middlewares app.use(“/api/user”, authRoute);

app.use(“/api/sendDevis”, devisRoute);

app.use(“/api/message”, messageRoute);

app.use(“/api/actu”, actuRoute);

// listen (start app with node server.js) ====================================== app.listen(3000);