2021年2月10日再開(TIL Express)

Express

const express = require("express");

const app = express();

app.get("/", (req, res) => {
  res.send("Hello Wolrd!!!");
});

app.get("/api/courses", (req, res) => {
  res.send([1, 2, 3]);
});

/// /api/course/1

app.get("/api/posts/:year/:month", (req, res) => {
  res.send(req.params);
});

const port = process.env.PORT || 3000;

app.listen(port, () => console.log(`Listeining on port ${port}...`));

app.get("/api/posts/:year/:month", (req, res) => {
  res.send(req.query);
});

app.get("/api/courses/:id", (req, res) => {
  const course = courses.find((c) => c.id === parseInt(req.params.id));
  if (!course)
    res.status(404).send("The course with the given ID was not found.");
  res.send(courses);
});

app.post("/api/courses", (req, res) => {
  const course = {
    id: courses.length + 1,
    name: req.body.name,
  };
  courses.push(course);
  res.send(course);
});

app.post("/api/courses", (req, res) => {
  if (!req.body.name || req.body.name.length < 3) {
    //400 Bad Request
    res.status(400).send("Name is required and should be minimum 3 characters");
    return;
  }
  const course = {
    id: courses.length + 1,
    name: req.body.name,
  };
  courses.push(course);
  res.send(course);
});

Invalidation Check

const Joi = require("joi");

const express = require('express');
// const port = 3000;
const app = express()
app.set('port', process.env.PORT || 3000);
app.use((req, res, next) => {
  console.log('요청받은 url: ' + req.url)
  next()
})
/* eslint no-unused-vars: 0 */
app.get('/', (req, res, next) => {
  res.send('OK')
  next()
}, (req, res) => {
  throw new Error('error')
})
app.use((err, req, res, next) => {
  console.error(err)
  res.status(500).send('서버에서 에러가 발생했습니다')
})
app.listen(app.get('port'), () => {
  console.log('서버 시작')
})