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Programming/Node.js

[Node.js_생활코딩]동적인 웹페이지 만들기_Delete

by _S0_H2_ 2021. 2. 17.
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삭제 버튼을 만들어보자.

이렇게 만들어지고 

클릭하면

 

삭제 버튼을 클릭하면 1 ) 파일 삭제 2 ) 첫 화면으로 보내기 를 구현해보자.

 

완료화면

 

delete 버튼 누르기 전

 

delete 버튼 누른 후

var http = require('http');
var fs = require('fs');
var url = require('url');
var qs = require('querystring');
 
function templateHTML(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}
    ${body}
  </body>
  </html>
  `;
}
function templateList(filelist){
  var list = '<ul>';
  var i = 0;
  while(i < filelist.length){
    list = list + `<li><a href="/?id=${filelist[i]}">${filelist[i]}</a></li>`;
    i = 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;
    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>${title}</h2>${description}`,
            `<a href="/create">create</a>`);
          response.writeHead(200);
          response.end(template);
        })
      } else {
        fs.readdir('./data', function(error, filelist){
          fs.readFile(`data/${queryData.id}`, 'utf8', function(err, description){
            var title = queryData.id; // onsubmit="check"
            var list = templateList(filelist);
            var template = templateHTML(title, list, 
              `<h2>${title}</h2>${description}`,
              `<a href="/create">create</a>
              <a href="/update?id=${title}">update</a>
              <form action = "delete_process" method="post">
                <input type = "hidden" name = "id" value = "${title}">
                <input type = "submit" value = "delete">
              </form>`);
            response.writeHead(200);
            response.end(template);
          });
        });
      }
    } else if(pathname === '/create'){
      fs.readdir('./data', function(error, filelist){
        var title = 'WEB - create';
        var list = templateList(filelist);
        var template = templateHTML(title, list, `
        <form action = "/create_process" method="post">
        <p><input type = "text" name = "title" placeholder = "title"></p>
        <p>
            <textarea name = "description" placeholder = "description"></textarea>
        </p>
        <p>
            <input type="submit">
        </p>
    </form>
    `, '');
        response.writeHead(200);
        response.end(template);
    });
  } else if(pathname === '/create_process'){
    var body = '';
    request.on('data', function(data){
      body = body + data;
    });
    request.on('end', function(){
      var post = qs.parse(body);
      var title = post.title;
      var description= post.description;
      // console.log(post);
      // 파일 저장해주자
      fs.writeFile(`data/${title}`, description, 'utf8', function(err){
        // 사용자가 자기가 쓴 글이 잘 전송되었는지 확인(redirection)
        response.writeHead(302, {Location : `/?id=${qs.escape(title)}`});
        response.end();
      })
    });
  } else if(pathname === '/update'){
    fs.readdir('./data', function(error, filelist){
      fs.readFile(`data/${queryData.id}`, 'utf8', function(err, description){
        var title = queryData.id;
        var list = templateList(filelist);
        var template = templateHTML(title, list, 
          `
          <form action = "/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="/create">create</a><a href="/update?id=${title}">update</a>`);
        response.writeHead(200);
        response.end(template);
      });
    });
  } else if(pathname === '/update_process'){
    var body = '';
    request.on('data', function(data){
      body = body + data;
    });
    request.on('end', function(){
      var post = qs.parse(body);
      var id = post.id;
      var title = post.title;
      var description= post.description;
      fs.rename(`data/${id}`, `data/${title}`, function(error){
        fs.writeFile(`data/${title}`, description, 'utf8', function(err){
        
          // 사용자가 자기가 쓴 글이 잘 전송되었는지 확인(redirection)
          response.writeHead(302, {Location : `/?id=${qs.escape(title)}`});
          response.end();
      })
      // console.log(post);
      // 파일 저장해주자
      })
    });
  } else if(pathname === '/delete_process'){
    var body = '';
    request.on('data', function(data){
      body = body + data;
    });
    request.on('end', function(){
      var post = qs.parse(body);
      var id = post.id;
      fs.unlink(`data/${id}`, function(error){
        response.writeHead(302, {Location : `/`});
        response.end();
      })
    });
  }
  else {
      response.writeHead(404);
      response.end('Not found');
    }

});
app.listen(3000);
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