Node.js

Node.js 파일생성(글쓰기)/ 파일생성과 동시에 Redirect

Starters 2020. 8. 24. 17:52
var http = require('http');
var fs = require('fs');
var url = require('url');
var qs = require('querystring');

function templateHTML(title, list, body){
  return `<!doctype html>
  <html>
  <head>
  <title>WEB1 - ${title}</title>
  <meta charset="utf-8">
  </head>
  <body>
  <h1><a href="/">WEB</a></h1>
  ${list}
  <a href="/create">create</a>
  ${body}
  </body>
  </html>
  `;
}

function templateList(filelist){
  var list =`<ul>`;
  var i = 0;
  while(i < filelist.length){
    list += `<li><a href="/?id=${filelist[i]}">${filelist[i]}</a></li>`
    i += 1;
  }
  list = list + `</ul>`;
  return list
}

var app = http.createServer(function(request,response){
    var _url = request.url;
    var queryData = url.parse(_url, true).query;
    var pathname = url.parse(_url, true).pathname;
    console.log(pathname);

    if(pathname === '/'){
      if(queryData.id === undefined){
        fs.readdir('./data', function(error, filelist){
          var title = 'Welcome';
          var description = 'Hello, Node.js';
          var list = templateList(filelist);
          var template = templateHTML(title, list, `<h2>${title}</h2><p>${description}</p>`);
          response.writeHead(200);
          response.end(template);
        });
      } else{
        fs.readdir('./data', function(error, filelist){
          fs.readFile(`data/${queryData.id}`, 'utf8', function(err, description){
            var title = queryData.id;
            var list = templateList(filelist);
            var template = templateHTML(title, list, `<h2>${title}</h2><p>${description}</p>`);
            response.writeHead(200);
            response.end(template);
          });
        });
      }
    } else if(pathname === '/create'){
      fs.readdir('./data', function(error, filelist){
        var title = 'WEB - create';
        var list = templateList(filelist);
        var template = templateHTML(title, list,`
          <form action="http://localhost:3000/process_create" method="post">
            <p>
              <input type="text" name="title" placeholder="title">
            </p>
            <p>
              <textarea name="description"></textarea>
            </p>
            <p>
              <input type="submit">
            </p>
          </form>
          `
         );
        response.writeHead(200);
        response.end(template);
      });
    } else if(pathname === '/process_create'){
      var body = '';
      request.on('data', function(data){
        body += data;
      });
      request.on('end', function(){
        var post = qs.parse(body);
        var title = post.title;
        var description = post.description;
        fs.writeFile(`data/${title}`, description, 'utf8',
        function(err){
          response.writeHead(302, {Location: `/?id=${title}`});;
          response.end();
        });
      });
    } else{
      response.writeHead(404);
      response.end('Not found');
    }
});
app.listen(3000);

fs.write() 에 저장할 경로, 쓸 내용, 인코딩 방식, 함수 파라미터로 입력

=> 글 작성하면 파일생성하고 해당 디렉토리에 저장된다.

함수안에 response.writeHead(302, {Location: `/?id=${title}`}); => 302는 파일이 써졌을 때 어떤 페이지로 redirect 하겠다는 뜻