Node.js 웹서버 구성

1. $ apt-get install curl
2. $ curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
3. $ apt-get install -y nodejs
4. $ npm config get prefix -> npm 디렉토리 확인 /usr 일경우 바로 밑에 진행 ㄱㄱ
5. $ mkdir ~/npm-global-modules
6. $ npm config set prefix '~/npm-global-modules'
7. $ export PATH=~/npm-global-modules/bin:$PATH
8. $ source ~/.profile
9. $ npm install -S mysql (MySQL 설치)



#이미지는 /usr/image 안에

var http = require('http');
var fs = require('fs');
var url = require('url');
var qs = require('qs');
var template = require('./template.js');
var path = require('path');
var imageDir = '/usr/image/';
var mysql = require('mysql');
var db = mysql.createConnection({
        host : 'localhost',
        user : 'root',
        password : '1234',
        database : 'tn'
});
db.connect();
 
function getImages(imageDir, callback) {
    var fileType = '.jpg',
        files = [], i;
    fs.readdir(imageDir, function (err, list) {
        for(i=0; i<list.length; i++) {
            if(path.extname(list[i]) === fileType) {
                files.push(list[i]); //store the file name into the array files
            }else{
                i++;
            }
        }
        callback(err, files);
    });
}
 
var app = http.createServer(function(request, response){
    var query = url.parse(request.url,true).query;
            pic= query.image;
 
        var _url = request.url;
        var queryData = url.parse(_url, true).query;
        var pathname = url.parse(_url, true).pathname;
 
 
        if(pathname === '/'){
         if(queryData.id === undefined){
                db.query('select * from tn', function(error, result){
                        var title = 'welcome';
                        var desc = 'hi node';
                        var list = template.list(result);
            var html;
            if (typeof pic === 'undefined') {
                getImages(imageDir, function (err, files) {
                                    var imageLists;
                    html = template.HTML(title, list,
                                    '<h2>${title}</h2>${desc}',
                                    '<a href="/create"></a>'
                                );
                    imageLists += html;
                    response.writeHead(200, {'Content-type':'text/html'});
                    response.end(imageLists);
                });
            }else {
                //read the image using fs and send the image content back in the response
                    fs.readFile(imageDir + pic, function (err, content) {
                            if (err) {
                                response.writeHead(400, {'Content-type':'text/html'})
                                 console.log(err);
                             response.end("No such image");    
                            } else {
                            //specify the content type in the response will be an image
                             response.writeHead(200,{'Content-type':'image/jpg'});
                             response.end(content);
                            }
                    });
               }
                      
                });
         }
        }
 
 
        if(pathname === '/big'){
         if(queryData.id === undefined){
                db.query('select * from tn', function(error, result){
                        var title = 'welcome';
                        var desc = 'hi node';
                        var list = template.list(result);
            var html;
            if (typeof pic === 'undefined') {
                getImages(imageDir, function (err, files) {
                    var imageLists = '';
                       imageLists += '<img src="/?image=' + files[0] + '">';
                  
                    
                    response.writeHead(200, {'Content-type':'text/html'});
                    response.end(imageLists);
                });
            }else {
                //read the image using fs and send the image content back in the response
                    fs.readFile(imageDir + pic, function (err, content) {
                            if (err) {
                                response.writeHead(400, {'Content-type':'text/html'})
                                 console.log(err);
                             response.end("No such image");    
                            } else {
                            //specify the content type in the response will be an image
                             response.writeHead(200,{'Content-type':'image/jpg'});
                             response.end(content);
                            }
                    });
               }
                      
                });
         }
        }
 
        if(pathname === '/small1'){
         if(queryData.id === undefined){
                db.query('select * from tn', function(error, result){
                        var title = 'welcome';
                        var desc = 'hi node';
                        var list = template.list(result);
            var html;
            if (typeof pic === 'undefined') {
                getImages(imageDir, function (err, files) {
                    var imageLists = '';
                       imageLists += '<img src="/?image=' + files[1] + '">';
                  
                    
                    response.writeHead(200, {'Content-type':'text/html'});
                    response.end(imageLists);
                });
            }else {
                //read the image using fs and send the image content back in the response
                    fs.readFile(imageDir + pic, function (err, content) {
                            if (err) {
                                response.writeHead(400, {'Content-type':'text/html'})
                                 console.log(err);
                             response.end("No such image");    
                            } else {
                            //specify the content type in the response will be an image
                             response.writeHead(200,{'Content-type':'image/jpg'});
                             response.end(content);
                            }
                    });
               }
                      
                });
         }
        }
 
 
        if(pathname === '/small2'){
         if(queryData.id === undefined){
                db.query('select * from tn', function(error, result){
                        var title = 'welcome';
                        var desc = 'hi node';
                        var list = template.list(result);
            var html;
            if (typeof pic === 'undefined') {
                getImages(imageDir, function (err, files) {
                    var imageLists = '';
                       imageLists += '<img src="/?image=' + files[2] + '">';
                  
                    
                    response.writeHead(200, {'Content-type':'text/html'});
                    response.end(imageLists);
                });
            }else {
                //read the image using fs and send the image content back in the response
                    fs.readFile(imageDir + pic, function (err, content) {
                            if (err) {
                                response.writeHead(400, {'Content-type':'text/html'})
                                 console.log(err);
                             response.end("No such image");    
                            } else {
                            //specify the content type in the response will be an image
                             response.writeHead(200,{'Content-type':'image/jpg'});
                             response.end(content);
                            }
                    });
               }
                      
                });
         }
        }
 
 
});
 
 
app.listen(3000);