express

.gitignore

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+node_modules

app.js

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+const express = require('express')
+const { v4: uuid } = require('uuid')
+
+const PORT = 8080
+const app = express()
+
+const data = []
+
+app.use(express.json())
+app.use(express.urlencoded({ extended: true }))
+
+app.get('/list', (request, response) => {
+  // const { body, query, params, url } = request
+  // const { cod } = params
+  // const { name, age } = query
+  // console.log('query: ', url)
+
+  // response.write('Node.js v14')
+
+  // const json = {
+  //   status: cod,
+  //   auth: true,
+  //   response: {
+  //     name,
+  //     age: Number(age)
+  //   }
+  // }
+
+  response.status(200).json(data)
+})
+
+app.post('/list', (request, response) => {
+  const { body } = request
+
+  const json = {
+    status: 200,
+    auth: true,
+    response: {
+      id: uuid(),
+      ...body
+    }
+  }
+
+  data.push(json.response)
+
+  response.status(200).json(json)
+})
+
+app.put('/list/:id', (request, response) => {
+
+  const { params, body } = request
+  const { id } = params
+
+  const dataUpdated = data.map((item) => {
+    if (item.id === id) {
+      return {
+        id,
+        ...body
+      }
+    }
+    return item
+  })
+
+  data.splice(0, data.length)
+
+  data.push(...dataUpdated)
+
+  const json = {
+    status: 200,
+    auth: true,
+    response: dataUpdated.find((item) => item.id === id)
+  }
+
+  response.status(200).json(json)
+
+})
+
+app.delete('/list/:id', (req, res) => {
+  const { params } = req
+
+  const dataUpdated = data.filter((item) => {
+    if (item.id === params.id) {
+      return false
+    }
+    return item
+  })
+
+  data.splice(0, data.length)
+
+  data.push(...dataUpdated)
+
+  res.status(200).json({
+    status: 200,
+    message: 'Se eliminó el registro con el código ' + params.id
+  })
+
+})
+
+app.listen(PORT, () => {
+  console.log(`El servidor está escuchando en el puerto ${PORT}`)
+})

demo-generator/app/app.js

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+const createError = require('http-errors');
+const express = require('express');
+const path = require('path');
+const cookieParser = require('cookie-parser');
+const logger = require('morgan');
+
+const indexRouter = require('./routes/index');
+const usersRouter = require('./routes/users');
+
+const app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'pug');
+
+app.use(logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/', indexRouter);
+app.use('/users', usersRouter);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  next(createError(404));
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = app;

demo-generator/app/bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+const app = require('../app');
+const debug = require('debug')('app:server');
+const http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+const port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+const server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  const port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  const bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  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;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  const addr = server.address();
+  const bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}