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hELLO ยท Designed By ์ •์ƒ์šฐ.
Rainbow๐ŸŒˆCoder

My dev Note๐Ÿ“’

[Node.js] (1) ์ฒซ ์‹œ์ž‘, Node ์„œ๋ฒ„ ์ƒ์„ฑ
Javascript/Node.js

[Node.js] (1) ์ฒซ ์‹œ์ž‘, Node ์„œ๋ฒ„ ์ƒ์„ฑ

2022. 11. 22. 16:36
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๋ฏธ๋ฆฌ๋ณด๊ธฐ

const http = require('http');

const server = http.createServer((req, res) => {
	console.log(req);
});

server.listen(3000);

 

 

 

์ค€๋น„ : ํ”„๋กœ์ ํŠธ, ๊ณต์‹ ํ™ˆํŽ˜์ด์ง€ ์„ค๋ช…์„œ

https://nodejs.dev/en/learn/

 

Introduction to Node.js

Getting started guide to Node.js, the server-side JavaScript runtime environment. Node.js is built on top of the Google Chrome V8 JavaScript engine, and it's mainly used to create web servers - but it's not limited to just that.

nodejs.dev

https://nodejs.org/en/docs/guides/getting-started-guide/

 

Getting Started Guide | Node.js

Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine.

nodejs.org

0. Node.js๋ž€

์˜คํ”ˆ ์†Œ์Šค ๋ฐ ๊ต์ฐจ ํ”Œ๋žซํผ JavaScript ๋Ÿฐํƒ€์ž„ ํ™˜๊ฒฝ์ž…๋‹ˆ๋‹ค. ๊ฑฐ์˜ ๋ชจ๋“  ์ข…๋ฅ˜์˜ ํ”„๋กœ์ ํŠธ์— ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๋Š” ๋„๊ตฌ์ด๋‹ค.

Node.js๋Š” Google Chrome์˜ ํ•ต์‹ฌ์ธ V8 JavaScript ์—”์ง„์„ ๋ธŒ๋ผ์šฐ์ € ์™ธ๋ถ€์—์„œ ์‹คํ–‰ํ•œ๋‹ค.

 

๊ณต์‹ ์„ค๋ช…

Node.js ์•ฑ์€ ๋ชจ๋“  ์š”์ฒญ์— โ€‹โ€‹๋Œ€ํ•ด ์ƒˆ ์Šค๋ ˆ๋“œ๋ฅผ ์ƒ์„ฑํ•˜์ง€ ์•Š๊ณ  ๋‹จ์ผ ํ”„๋กœ์„ธ์Šค์—์„œ ์‹คํ–‰๋ฉ๋‹ˆ๋‹ค. Node.js๋Š” ํ‘œ์ค€ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ์—์„œ JavaScript ์ฝ”๋“œ๊ฐ€ ์ฐจ๋‹จ๋˜์ง€ ์•Š๋„๋ก ํ•˜๋Š” ๋น„๋™๊ธฐ I/O ํ”„๋ฆฌ๋ฏธํ‹ฐ๋ธŒ ์„ธํŠธ๋ฅผ ์ œ๊ณตํ•˜๋ฉฐ ์ผ๋ฐ˜์ ์œผ๋กœ Node.js์˜ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋Š” ๋น„์ฐจ๋‹จ ํŒจ๋Ÿฌ๋‹ค์ž„์„ ์‚ฌ์šฉํ•˜์—ฌ ์ž‘์„ฑ๋˜๋ฏ€๋กœ ์ฐจ๋‹จ ๋™์ž‘์„ ํ‘œ์ค€์ด ์•„๋‹Œ ์˜ˆ์™ธ๋กœ ๋งŒ๋“ญ๋‹ˆ๋‹ค.
Node.js๊ฐ€ ๋„คํŠธ์›Œํฌ์—์„œ ์ฝ๊ธฐ, ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ๋˜๋Š” ํŒŒ์ผ ์‹œ์Šคํ…œ ์•ก์„ธ์Šค์™€ ๊ฐ™์€ I/O ์ž‘์—…์„ ์ˆ˜ํ–‰ํ•  ๋•Œ ์Šค๋ ˆ๋“œ๋ฅผ ์ฐจ๋‹จํ•˜๊ณ  ๋Œ€๊ธฐ ์ค‘์ธ CPU ์ฃผ๊ธฐ๋ฅผ ๋‚ญ๋น„ํ•˜๋Š” ๋Œ€์‹  Node.js๋Š” ์‘๋‹ต์ด ๋Œ์•„์˜ค๋ฉด ์ž‘์—…์„ ์žฌ๊ฐœํ•ฉ๋‹ˆ๋‹ค.
์ด๋ฅผ ํ†ตํ•ด Node.js๋Š” ์‹ฌ๊ฐํ•œ ๋ฒ„๊ทธ ์›์ธ์ด ๋  ์ˆ˜ ์žˆ๋Š” ์Šค๋ ˆ๋“œ ๋™์‹œ์„ฑ ๊ด€๋ฆฌ ๋ถ€๋‹ด ์—†์ด ๋‹จ์ผ ์„œ๋ฒ„์—์„œ ์ˆ˜์ฒœ ๊ฐœ์˜ ๋™์‹œ ์—ฐ๊ฒฐ์„ ์ฒ˜๋ฆฌํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
Node.js๋Š” ๋ธŒ๋ผ์šฐ์ €์šฉ JavaScript๋ฅผ ์ž‘์„ฑํ•˜๋Š” ์ˆ˜๋ฐฑ๋งŒ ๋ช…์˜ ํ”„๋ŸฐํŠธ์—”๋“œ ๊ฐœ๋ฐœ์ž๊ฐ€ ์ด์ œ ์™„์ „ํžˆ ๋‹ค๋ฅธ ์–ธ์–ด๋ฅผ ๋ฐฐ์šธ ํ•„์š” ์—†์ด ํด๋ผ์ด์–ธํŠธ ์ธก ์ฝ”๋“œ ์™ธ์—๋„ ์„œ๋ฒ„ ์ธก ์ฝ”๋“œ๋ฅผ ์ž‘์„ฑํ•  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๊ณ ์œ ํ•œ ์ด์ ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
Node.js์—์„œ๋Š” ๋ชจ๋“  ์‚ฌ์šฉ์ž๊ฐ€ ๋ธŒ๋ผ์šฐ์ €๋ฅผ ์—…๋ฐ์ดํŠธํ•  ๋•Œ๊นŒ์ง€ ๊ธฐ๋‹ค๋ฆด ํ•„์š”๊ฐ€ ์—†์œผ๋ฏ€๋กœ ์ƒˆ๋กœ์šด ECMAScript ํ‘œ์ค€์„ ๋ฌธ์ œ ์—†์ด ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. Node.js ๋ฒ„์ „์„ ๋ณ€๊ฒฝํ•˜์—ฌ ์‚ฌ์šฉํ•  ECMAScript ๋ฒ„์ „์„ ๊ฒฐ์ •ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ํ”Œ๋ž˜๊ทธ์™€ ํ•จ๊ป˜ Node.js๋ฅผ ์‹คํ–‰ํ•˜์—ฌ ํŠน์ • ์‹คํ—˜ ๊ธฐ๋Šฅ์„ ํ™œ์„ฑํ™”ํ•  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.

 

 

1. Node.js ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜์„ ๊ตฌ์„ฑํ•˜๋Š” ๋ฃจํŠธ ํŒŒ์ผ ์ƒ์„ฑ (server.js ๋‚˜ app.js)

-> ๋งจ ๋งˆ์ง€๋ง‰ ๋‹จ๊ณ„๋กœ ์„œ๋ฒ„์˜ ํด๋ผ์šฐ๋“œ์— ์žˆ๋Š” ์ปดํ“จํ„ฐ์— Node.js ๋ฅผ ์‹คํ–‰ํ• ํ…Œ๋‹ˆ app.js๋กœ ๊ฒฐ์ •.

์ด  app.js ํŒŒ์ผ์— Node.js๋ฅผ ํ†ตํ•ด ์„œ๋ฒ„๋ฅผ ์ƒ์„ฑํ•˜๋ ค๋ฉด ๊ธฐ๋Šฅ ๋ช‡๊ฐ€์ง€๋ฅผ ๋ถˆ๋Ÿฌ์™€์•ผ ํ•œ๋‹ค.

 

Node.js์˜ ์ฝ”์–ด ๋ชจ๋“ˆ

http : Launch a server, send requests Node.js ์•ฑ์ด ๋‹ค๋ฅธ ์„œ๋ฒ„๋กœ ์š”์ฒญ์„ ๋ณด๋‚ด ์—ฌ๋Ÿฌ ์„œ๋ฒ„ ๊ฐ„์— ์†Œํ†ตํ•  ์ˆ˜ ์žˆ๋‹ค
https : Launch a SSL server Https์˜ ๊ฒฝ์šฐ ๋ชจ๋“  ์ „์†ก ๋ฐ์ดํ„ฐ๊ฐ€ ์•”ํ˜ธํ™”๋˜๋Š” SSL ์•”ํ˜ธํ™” ์„œ๋ฒ„๋ฅผ ์ถœ์‹œํ•  ๋•Œ ๋„์›€์ด ๋œ๋‹ค.
fs : ํŒŒ์ผ ์‹œ์Šคํ…œ ๊ด€๋ จ
path : ํŒŒ์ผ ์‹œ์Šคํ…œ์— ์žˆ๋Š” ํŒŒ์ผ์— ๋Œ€ํ•œ ๊ฒฝ๋กœ๋ฅผ ๊ตฌ์ถ•ํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ (์œˆ๋„์šฐ, ๋งฅ, ๋ฆฌ๋ˆ…์Šค๊ฐ€ ๋‹ค๋ฅธ ํ˜•์‹์„ ์‚ฌ์šฉํ•˜๋Š”๋ฐ ๋Œ€์‘)
os : ์šด์˜์ฒด์ œ ๊ด€๋ จ ๋„์›€์„ ์คŒ

 

2. http ๋ชจ๋“ˆ ๋ถˆ๋Ÿฌ์˜ค๊ธฐ

์šฐ์„  http ๋ชจ๋“ˆ์„ ๋ถˆ๋Ÿฌ์™€์„œ Node.js ์— ํƒ‘์žฌ๋œ http ๋ชจ๋“ˆ์˜ ๊ธฐ๋Šฅ์„ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•œ๋‹ค.

์ ˆ๋Œ€ ๋ณ€๊ฒฝํ•˜์ง€ ์•Š์„ ๊ฐ’์„ ์‚ฌ์šฉํ•  ๊ฒƒ์ด๋ฏ€๋กœ const๋ฅผ ์‚ฌ์šฉ, ๋‹ค์‹œ ๋ณ€๊ฒฝํ•˜๊ฑฐ๋‚˜ ๋ฎ์–ด์“ฐ์ง€ ์•Š๋„๋ก ํ•œ๋‹ค.

Node.js๋Š” ์ „์—ญ์œผ๋กœ ๋…ธ์ถœํ•˜๋Š” ํŠน์„ฑ์ด ์žˆ์–ด์„œ Node.js๋กœ ์‹คํ–‰ํ•˜๋Š” ๋ชจ๋“  ํŒŒ์ผ์—์„œ ๊ธฐ๋ณธ์œผ๋กœ require์ด๋ผ๋Š” ํ‚ค์›Œ๋“œ๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค.

(* require ํ‚ค์›Œ๋“œ๋Š” ๋‹ค๋ฅธ ํŒŒ์ผ๋กœ์˜ ๊ฒฝ๋กœ๋‚˜ js ํŒŒ์ผ์„ ๋ถˆ๋Ÿฌ์˜ฌ ์ˆ˜ ์žˆ๋‹ค)

์ฐธ๊ณ ๋กœ ํŒŒ์ผ ๊ฒฝ๋กœ๋Š” ๋ฐ˜๋“œ์‹œ ./(์ƒ๋Œ€ ๊ฒฝ๋กœ)๋‚˜ ์ ˆ๋Œ€ ๊ฒฝ๋กœ์˜ ๊ฒฝ์šฐ /๋กœ ์‹œ์ž‘ํ•œ๋‹ค.

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

์ด๋ ‡๊ฒŒ ์ž…๋ ฅํ•˜๋ฉด ๊ฐ™์€ ํด๋”์—์„œ http ํŒŒ์ผ์„ ์ฐพ์„ ๊ฒƒ์ด๋‹ค.

./์ด๋‚˜ /๋ฅผ ์ƒ๋žตํ•˜๋ฉด ๋กœ์ปฌ ํŒŒ์ผ์„ ์ฐพ์ง€ ์•Š์•„ http.js ํŒŒ์ผ์ด ์žˆ์–ด๋„ ๋ถˆ๋Ÿฌ์˜ค์ง€ ์•Š์„ ๊ฒƒ์ด๋‹ค.

 

const http = require('http');

๊ฒฝ๋กœ๋ฅผ ์ƒ๋žตํ•˜๋ฉด http๋ผ๋Š” ๊ธ€๋กœ๋ฒŒ ๋ชจ๋“ˆ์„ ์ฐพ๊ฒŒ ๋œ๋‹ค.(์ด๋Š” Node.js์— ํƒ‘์žฌ๋œ ๋ชจ๋“ˆ ์ค‘ ํ•˜๋‚˜์ด๋‹ค.)

์ด์ œ ๋ถˆ๋Ÿฌ์˜จ ๊ธ€๋กœ๋ฒŒ ๋ชจ๋“ˆ์˜ ๊ธฐ๋Šฅ์„ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค.

 

3. createServer ๋ฉ”์„œ๋“œ

์„œ๋ฒ„๋ฅผ ์ƒ์„ฑํ•  ๋•Œ ๊ผญ ํ•„์š”ํ•œ ๋ฉ”์„œ๋“œ์ด๋‹ค.

 

//๊ธฐ๋ณธํ˜•
const http = require('http');

//createServer๊ฐ€ ์ƒ์„ฑํ•œ ์„œ๋ฒ„๋ฅผ ์ƒ์ˆ˜๋กœ ์ •ํ•ด์ค€๋‹ค. ๋ณ€๊ฒฝํ•˜๊ฑฐ๋‚˜ ๋ฎ์–ด์“ฐ์ง€ ์•Š์„ ๊ฒƒ์ด๋ฏ€๋กœ
const server = http.createServer((req, res) => {
	console.log(req);
});

server.listen(3000);

createServer์˜ ์ธ์ž๋กœ function(req,res)๋ฅผ ์ž…๋ ฅํ•˜๋ฉด ์„œ๋ฒ„์— ์š”์ฒญ์ด ๋“ค์–ด์˜ฌ ๋•Œ๋งˆ๋‹ค ๋…ธ๋“œ๊ฐ€ (์ต๋ช…)์ฝœ๋ฐฑ ํ•จ์ˆ˜๋ฅผ ์‹คํ–‰ํ•œ๋‹ค.

์ด๊ฒŒ ๋ฐ”๋กœ Node.js์˜ ์ฃผ๋œ ์ด๋ฒคํŠธ ๋“œ๋ฆฌ๋ธ ์•„ํ‚คํ…์ฒ˜(EDA)์ด๋‹ค.

์ฆ‰, ์š”์ฒญ์ด ๋“ค์–ด์˜ค๋ฉด ์ด ํ•จ์ˆ˜๋ฅผ ์‹คํ–‰ํ•˜๋ผ ์•Œ๋ ค์ฃผ๋Š” ๊ฒƒ์ด๋‹ค. 

 

4. listen ๋ฉ”์„œ๋“œ

Node.js๊ฐ€ ์Šคํฌ๋ฆฝํŠธ๋ฅผ ๋ฐ”๋กœ ์ข…๋ฃŒํ•˜์ง€ ์•Š๊ณ  ๊ณ„์† ์‹คํ–‰๋˜๋ฉด์„œ ๋“ฃ๋„๋ก ํ•œ๋‹ค.

listne์— ์ž…๋ ฅํ•  ์ˆ˜ ์žˆ๋Š” ์ธ์ˆ˜ ์—ฌ๋Ÿฌ ๊ฐœ ์ค‘,

(1) ํฌํŠธ : ์‹ค๋ฌด์—์„œ๋Š” ๋Œ€๊ฐœ ํฌํŠธ ์ธ์ž๋ฅผ ์ž…๋ ฅํ•˜์ง€ ์•Š๊ณ , ๊ธฐ๋ณธ์œผ๋กœ ํฌํŠธ๋ฒˆํ˜ธ 80์ด ์‚ฌ์šฉ๋œ๋‹ค.

(2) ํ˜ธ์ŠคํŠธ์ด๋ฆ„

const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World');
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

์ด ์Šค๋‹ˆํŽซ์„ ์‹คํ–‰ํ•˜๋ ค๋ฉด app.jsํŒŒ์ผ์„ ์ €์žฅํ•˜๊ณ  node app.jsํ„ฐ๋ฏธ๋„์—์„œ ์‹คํ–‰

http://localhost:3000์— ๋ฐฉ๋ฌธํ•˜๋ฉด "Hello World"๋ผ๋Š” ๋ฉ”์‹œ์ง€๊ฐ€ ํ‘œ์‹œ๋œ๋‹ค.

 

so cute~

ctrl+C๋ฅผ ์ด์šฉํ•˜๋ฉด ์ •์ƒ ์ข…๋ฃŒ๋œ๋‹ค.

 

 

 

 

 

 

 

 

 

 

 

 

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