수업소개
관리하는 페이지가 많아짐에 따라서 코드의 복잡도가 급격히 높아지게 됩니다. 복잡도를 낮추는 방법이 라우터입니다. 라우터를 알아봅시다.
강의1
라우터를 살펴보기 전에 기존 앱의 주소체계를 변경하는 작업을 합시다.
소스코드
main.js
var express = require('express') var app = express() var fs = require('fs'); var path = require('path'); var qs = require('querystring'); var bodyParser = require('body-parser'); var sanitizeHtml = require('sanitize-html'); var compression = require('compression') var template = require('./lib/template.js'); app.use(express.static('public')); app.use(bodyParser.urlencoded({ extended: false })); app.use(compression()); app.get('*', function(request, response, next){ fs.readdir('./data', function(error, filelist){ request.list = filelist; next(); }); }); //route, routing //app.get('/', (req, res) => res.send('Hello World!')) app.get('/', function(request, response) { var title = 'Welcome'; var description = 'Hello, Node.js'; var list = template.list(request.list); var html = template.HTML(title, list, ` <h2>${title}</h2>${description} <img src="/images/hello.jpg" style="width:300px; display:block; margin-top:10px;"> `, `<a href="/topic/create">create</a>` ); response.send(html); }); app.get('/topic/create', function(request, response){ var title = 'WEB - create'; var list = template.list(request.list); var html = template.HTML(title, list, ` <form action="/topic/create_process" method="post"> <p><input type="text" name="title" placeholder="title"></p> <p> <textarea name="description" placeholder="description"></textarea> </p> <p> <input type="submit"> </p> </form> `, ''); response.send(html); }); app.post('/topic/create_process', function(request, response){ var post = request.body; var title = post.title; var description = post.description; fs.writeFile(`data/${title}`, description, 'utf8', function(err){ response.redirect(`/topic/${title}`); }); }); app.get('/topic/update/:pageId', function(request, response){ var filteredId = path.parse(request.params.pageId).base; fs.readFile(`data/${filteredId}`, 'utf8', function(err, description){ var title = request.params.pageId; var list = template.list(request.list); var html = template.HTML(title, list, ` <form action="/topic/update_process" method="post"> <input type="hidden" name="id" value="${title}"> <p><input type="text" name="title" placeholder="title" value="${title}"></p> <p> <textarea name="description" placeholder="description">${description}</textarea> </p> <p> <input type="submit"> </p> </form> `, `<a href="/topic/create">create</a> <a href="/topic/update/${title}">update</a>` ); response.send(html); }); }); app.post('/topic/update_process', function(request, response){ var post = request.body; var id = post.id; var title = post.title; var description = post.description; fs.rename(`data/${id}`, `data/${title}`, function(error){ fs.writeFile(`data/${title}`, description, 'utf8', function(err){ response.redirect(`/topic/${title}`); }) }); }); app.post('/topic/delete_process', function(request, response){ var post = request.body; var id = post.id; var filteredId = path.parse(id).base; fs.unlink(`data/${filteredId}`, function(error){ response.redirect('/'); }); }); app.get('/topic/:pageId', function(request, response, next) { var filteredId = path.parse(request.params.pageId).base; fs.readFile(`data/${filteredId}`, 'utf8', function(err, description){ if(err){ next(err); } else { var title = request.params.pageId; var sanitizedTitle = sanitizeHtml(title); var sanitizedDescription = sanitizeHtml(description, { allowedTags:['h1'] }); var list = template.list(request.list); var html = template.HTML(sanitizedTitle, list, `<h2>${sanitizedTitle}</h2>${sanitizedDescription}`, ` <a href="/topic/create">create</a> <a href="/topic/update/${sanitizedTitle}">update</a> <form action="/topic/delete_process" method="post"> <input type="hidden" name="id" value="${sanitizedTitle}"> <input type="submit" value="delete"> </form>` ); response.send(html); } }); }); app.use(function(req, res, next) { res.status(404).send('Sorry cant find that!'); }); app.use(function (err, req, res, next) { console.error(err.stack) res.status(500).send('Something broke!') }); app.listen(3000, function() { console.log('Example app listening on port 3000!') });
template.js
module.exports = { HTML:function(title, list, body, control){ return ` <!doctype html> <html> <head> <title>WEB1 - ${title}</title> <meta charset="utf-8"> </head> <body> <h1><a href="/">WEB</a></h1> ${list} ${control} ${body} </body> </html> `; },list:function(filelist){ var list = '<ul>'; var i = 0; while(i < filelist.length){ list = list + `<li><a href="/topic/${filelist[i]}">${filelist[i]}</a></li>`; i = i + 1; } list = list+'</ul>'; return list; } }
강의2
라우터를 만들어서 파일로 분리
소스코드
main.js
var express = require('express'); var app = express(); var fs = require('fs'); var path = require('path'); var qs = require('querystring'); var bodyParser = require('body-parser'); var sanitizeHtml = require('sanitize-html'); var compression = require('compression') var template = require('./lib/template.js'); var topicRouter = require('./routes/topic'); app.use(express.static('public')); app.use(bodyParser.urlencoded({ extended: false })); app.use(compression()); app.get('*', function(request, response, next){ fs.readdir('./data', function(error, filelist){ request.list = filelist; next(); }); }); app.use('/topic', topicRouter); //route, routing //app.get('/', (req, res) => res.send('Hello World!')) app.get('/', function(request, response) { var title = 'Welcome'; var description = 'Hello, Node.js'; var list = template.list(request.list); var html = template.HTML(title, list, ` <h2>${title}</h2>${description} <img src="/images/hello.jpg" style="width:300px; display:block; margin-top:10px;"> `, `<a href="/topic/create">create</a>` ); response.send(html); });
topic.js
var express = require('express'); var router = express.Router(); var path = require('path'); var fs = require('fs'); var sanitizeHtml = require('sanitize-html'); var template = require('../lib/template.js'); router.get('/create', function(request, response){ var title = 'WEB - create'; var list = template.list(request.list); var html = template.HTML(title, list, ` <form action="/topic/create_process" method="post"> <p><input type="text" name="title" placeholder="title"></p> <p> <textarea name="description" placeholder="description"></textarea> </p> <p> <input type="submit"> </p> </form> `, ''); response.send(html); }); router.post('/create_process', function(request, response){ var post = request.body; var title = post.title; var description = post.description; fs.writeFile(`data/${title}`, description, 'utf8', function(err){ response.redirect(`/topic/${title}`); }); }); router.get('/update/:pageId', function(request, response){ var filteredId = path.parse(request.params.pageId).base; fs.readFile(`data/${filteredId}`, 'utf8', function(err, description){ var title = request.params.pageId; var list = template.list(request.list); var html = template.HTML(title, list, ` <form action="/topic/update_process" method="post"> <input type="hidden" name="id" value="${title}"> <p><input type="text" name="title" placeholder="title" value="${title}"></p> <p> <textarea name="description" placeholder="description">${description}</textarea> </p> <p> <input type="submit"> </p> </form> `, `<a href="/topic/create">create</a> <a href="/topic/update/${title}">update</a>` ); response.send(html); }); }); router.post('/update_process', function(request, response){ var post = request.body; var id = post.id; var title = post.title; var description = post.description; fs.rename(`data/${id}`, `data/${title}`, function(error){ fs.writeFile(`data/${title}`, description, 'utf8', function(err){ response.redirect(`/topic/${title}`); }) }); }); router.post('/delete_process', function(request, response){ var post = request.body; var id = post.id; var filteredId = path.parse(id).base; fs.unlink(`data/${filteredId}`, function(error){ response.redirect('/'); }); }); router.get('/:pageId', function(request, response, next) { var filteredId = path.parse(request.params.pageId).base; fs.readFile(`data/${filteredId}`, 'utf8', function(err, description){ if(err){ next(err); } else { var title = request.params.pageId; var sanitizedTitle = sanitizeHtml(title); var sanitizedDescription = sanitizeHtml(description, { allowedTags:['h1'] }); var list = template.list(request.list); var html = template.HTML(sanitizedTitle, list, `<h2>${sanitizedTitle}</h2>${sanitizedDescription}`, ` <a href="/topic/create">create</a> <a href="/topic/update/${sanitizedTitle}">update</a> <form action="/topic/delete_process" method="post"> <input type="hidden" name="id" value="${sanitizedTitle}"> <input type="submit" value="delete"> </form>` ); response.send(html); } }); }); module.exports = router;
강의3
홈페이지를 파일로 분리해봅시다.
소스코드
main.js
var express = require('express'); var app = express(); var fs = require('fs'); var bodyParser = require('body-parser'); var compression = require('compression') var indexRouter = require('./routes/index'); var topicRouter = require('./routes/topic'); app.use(express.static('public')); app.use(bodyParser.urlencoded({ extended: false })); app.use(compression()); app.get('*', function(request, response, next){ fs.readdir('./data', function(error, filelist){ request.list = filelist; next(); }); }); app.use('/', indexRouter); app.use('/topic', topicRouter); app.use(function(req, res, next) { res.status(404).send('Sorry cant find that!'); }); app.use(function (err, req, res, next) { console.error(err.stack) res.status(500).send('Something broke!') }); app.listen(3000, function() { console.log('Example app listening on port 3000!') });
routes/index.js
var express = require('express'); var router = express.Router(); var template = require('../lib/template.js'); router.get('/', function(request, response) { var title = 'Welcome'; var description = 'Hello, Node.js'; var list = template.list(request.list); var html = template.HTML(title, list, ` <h2>${title}</h2>${description} <img src="/images/hello.jpg" style="width:300px; display:block; margin-top:10px;"> `, `<a href="/topic/create">create</a>` ); response.send(html); }); module.exports = router;