server.js

const express = require("express");
const { createProxyMiddleware } = require("http-proxy-middleware");

// app definition
const app = express();

// laod cors in the dev environment
const cors = require("cors");
app.use(cors());

// Load environment variables
const TARGET_URL = "http://localhost:3000"; // gets loaded from the env file

app.use((req, res, next) => {
  console.log(`req.path: ${req.path}, req.ip: ${req.ip}`);
  next();
});

app.use(
  createProxyMiddleware({
    target: TARGET_URL,
    changeOrigin: true,
    logger: console,
    secure: false,
    onProxyReq: (proxyReq, req, res) => {},
    onError: (err, req, res) => {
      const status = err.status || 503; // Default to 503 if err.status is not defined
      const message = `Proxy error: ${req.url} - ${
        err.message || "Internal Server Error"
      }`;

      res.status(status).send(message);
    },
  })
);

// running on default port
const PORT = 4000;
app.listen(PORT, () => {
  console.log(`Proxy server is running on port ${PORT}`);
});