Angular/Production-texte-unique

initialisation

cd ~Angular
ng new production-texte-unique --style=scss --skip-tests=true
routing y

cd production-texte-unique/
mkdir backend

backend/emacs app.js

const express = require('express');

const app = express();

app.use((req, res) => {
  res.json({ message: 'Your request was successful!' }); 
});

module.exports = app;

backend/server.js

const http = require('http');
const app = require('./app');

const port = process.env.PORT || 3000;
app.set('port', port);

const server = http.createServer(app);

server.listen(process.env.PORT || 3000);
console.log('Listening on port http://localhost:' + port);

If you try and make a request to your server, you should get back a JSON object containing the message we have specified.

git commit -m "backend/server.js backend/app.js localhost:3000 JSON message"

middleware

backend/app.js

const express = require('express');
const app = express();

app.use((req, res, next) => {
    console.log('Request received');
    next();
});

app.use((req, res, next) => {
  res.status(201);
  next();
});

app.use((req, res, next) => {
  res.json({ message: 'Your request was successful!' });
  next();
});

app.use((req, res, next) => {
  console.log('Response sent successfully!');
});

module.exports = app;

backend/server.js

const http = require('http');
const app = require('./app');

const normalizePort = val => {
  const port = parseInt(val, 10);

  if (isNaN(port)) {
    return val;
  }
  if (port >= 0) {
    return port;
  }
  return false;
};

const port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

const errorHandler = error => {
  if (error.syscall !== 'listen') {
    throw error;
  }
  const address = server.address();
  const bind = typeof address === 'string' ? 'pipe ' + address : 'port: ' + port;
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges.');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use.');
      process.exit(1);
      break;
    default:
      throw error;
  }
};

const server = http.createServer(app);

server.on('error', errorHandler);
server.on('listening', () => {
  const address = server.address();
  const bind = typeof address === 'string' ? 'pipe ' + address : 'port ' + port;
  console.log('Listening on ' + bind);
});

server.listen(port);