Update app.js

-//http://khuhub.khu.ac.kr/2021105602/menu_recommand_webpage.git
+var lenguage = 'not';
 var express = require('express');
 const request = require('request');
 const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
-const TOKEN = '채널 토큰'
+const TOKEN = 'Ur8nbk2bQAc9KavLSSJv0uzlKWCxCBnOJOKyqbRS1mMHWgJlEOPfb7v+X1DDEHocUmhU7KnPFN+KHt5S3SYd5QmF42aTeQpW2gDVTjyqty1Tn+p6QqEhI/uSz659PBHwczEYn0Plx+akfCNHDPJRpAdB04t89/1O/w1cDnyilFU='
 const PAPAGO_URL = 'https://openapi.naver.com/v1/papago/n2mt'
-const PAPAGO_ID = '파파고 ID'
-const PAPAGO_SECRET = '파파고 Client Secret'
+const PAPAGO_ID = '1Z83W3lUGLqnNbrDAk8A'
+const PAPAGO_SECRET = 'ST7ElRPFPP'
 const fs = require('fs');
 const path = require('path');
 const HTTPS = require('https');
-const domain = "도메인 명"
+const domain = "2021105602.osschatbot2022.tk"
 const sslport = 23023;
 const bodyParser = require('body-parser');
+const res = require('express/lib/response');
 var app = express();
-app.use(bodyParser.json());
-app.post('/hook', function (req, res) {
-    var eventObj = req.body.events[0];
-    var source = eventObj.source;
-    var message = eventObj.message;
-    // request log
-    console.log('======================', new Date() ,'======================');
-    console.log('[request]', req.body);
-    console.log('[request source] ', eventObj.source);
-    console.log('[request message]', eventObj.message);
-    trans(eventObj.replyToken, eventObj.message.text);
+do
+{
+    app.use(bodyParser.json());
+    app.post('/hook', function (req, res) {
+
+        var eventObj = req.body.events[0];
+        var source = eventObj.source;
+        var message = eventObj.message;
+
+        // request log
+        console.log('======================', new Date() ,'======================');
+        console.log('[request]', req.body);
+        console.log('[request source] ', eventObj.source);
+        console.log('[request message]', eventObj.message);
+
+        if(eventObj.message.text=='영어')
+        {
+            lenguage='en';
+        }else if(eventObj.message.text=='일본어')
+        {
+            lenguage = 'ja'
+        }else if(eventObj.message.text=='프랑스어') 
+        {
+            lenguage = 'fr'
+        }else
+        {
+            if(lenguage == 'en')
+            {
+                trans_en(eventObj.replyToken, eventObj.message.text);
+            }else if(lenguage == 'ja')
+            {
+                trans_ja(eventObj.replyToken, eventObj.message.text);
+            }else if(lenguage == 'fr')
+            {
+                trans_fr(eventObj.replyToken, eventObj.message.text);
+            }else
+            {   
+                trans_en(eventObj.replyToken, '오류');
+            }
+        }
     
-    res.sendStatus(200);
-});
-function trans(replyToken, message) {
+
+        res.sendStatus(200);
+    });
+}while(lenguage=='en' | lenguage == 'fr' | lenguage == 'ja');
+
+function trans_en(replyToken, message) {
+
     request.post(
         {
             url: PAPAGO_URL,
@@ -62,7 +96,88 @@ function trans(replyToken, message) {
                     });
             }
         });
+
+}
+
+function trans_ja(replyToken, message) {
+
+    request.post(
+        {
+            url: PAPAGO_URL,
+            headers: {
+                'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
+                'X-Naver-Client-Id': `${PAPAGO_ID}`,
+                'X-Naver-Client-Secret': `${PAPAGO_SECRET}`
+            },
+            body: 'source=ko&target=ja&text=' + message,
+            json:true
+        },(error, response, body) => {
+            if(!error && response.statusCode == 200) {
+                console.log(body.message);
+                var transMessage = body.message.result.translatedText;
+                request.post(
+                    {
+                        url: TARGET_URL,
+                        headers: {
+                            'Authorization': `Bearer ${TOKEN}`
+                        },
+                        json: {
+                            "replyToken":replyToken,
+                            "messages":[
+                                {
+                                    "type":"text",
+                                    "text":transMessage
+                                }
+                            ]
+                        }
+                    },(error, response, body) => {
+                        console.log(body)
+                    });
+            }
+        });
+
+}
+
+function trans_fr(replyToken, message) {
+
+    request.post(
+        {
+            url: PAPAGO_URL,
+            headers: {
+                'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
+                'X-Naver-Client-Id': `${PAPAGO_ID}`,
+                'X-Naver-Client-Secret': `${PAPAGO_SECRET}`
+            },
+            body: 'source=ko&target=fr&text=' + message,
+            json:true
+        },(error, response, body) => {
+            if(!error && response.statusCode == 200) {
+                console.log(body.message);
+                var transMessage = body.message.result.translatedText;
+                request.post(
+                    {
+                        url: TARGET_URL,
+                        headers: {
+                            'Authorization': `Bearer ${TOKEN}`
+                        },
+                        json: {
+                            "replyToken":replyToken,
+                            "messages":[
+                                {
+                                    "type":"text",
+                                    "text":transMessage
+                                }
+                            ]
+                        }
+                    },(error, response, body) => {
+                        console.log(body)
+                    });
+            }
+        });
+
 }
+
+
 try {
     const option = {
       ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),