[Develop] Comment Add

+// Naver WEB Request
 var request = require('request');
+
+// Web Package
 var express = require('express');
 var app = express();
 
+// Kakao Parser
 var bodyParser = require('body-parser');
 
+// Naver API URL
 var api_url = 'https://openapi.naver.com/v1/papago/n2mt';
 
+// Naver Auth Key
 var client_id = '86rKmat0DijccSxKa01P';
 var client_secret = 'rMapNjB8DP';
+
+// Parse Application JSON
 app.use(bodyParser.json());
+
+// Parse Application/x-www-form-urlencoded
 app.use(bodyParser.urlencoded({ extended: true}));
 
+// Kakao Keyboard API
 app.get('/keyboard', function(req, res) {
   const menu = {
     "type": 'buttons',
@@ -21,6 +32,7 @@ app.get('/keyboard', function(req, res) {
   }).send(JSON.stringify(menu));
 });
 
+// Kakao Message API
 app.post('/message', function(req, res) {
   const _obj = {
     user_key: req.body.user_key,
@@ -30,26 +42,37 @@ app.post('/message', function(req, res) {
 
   console.log(_obj.content)
 
+  // Naver Papago Translate
   var options = {
     url: api_url,
+    // 한국어(source : ko), 영어(target: en), 카톡에서 받는 메시지(text)
     form: {'source':'ko', 'target':'en', 'text':req.body.content},
     headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
   };
+
+  // Naver Post API
   request.post(options, function(error, response, body){
+    // Translate API Sucess
     if(!error && response.statusCode == 200){
+      // JSON
       var objBody = JSON.parse(response.body);
+      // Message 잘 찍히는지 확인
       console.log(objBody.message.result.translatedText);
-  
+
+      // Kakao Message API  
       let massage = {
         "message": {
+          // Naver API Translate 결과를 Kakao Message
           "text": objBody.message.result.translatedText 
         },
       };
-      
+
+      // Kakao Message API 전송 
       res.set({
         'content-type': 'application/json'
       }).send(JSON.stringify(massage));
     }else{
+      // Naver Message Error 발생
       res.status(response.statusCode).end();
       console.log('error = ' + response.statusCode);
 
@@ -59,6 +82,7 @@ app.post('/message', function(req, res) {
         },
       };
 
+      // Kakao에 Error Message
       res.set({
         'content-type': 'application/json'
       }).send(JSON.stringify(massage));
@@ -66,5 +90,6 @@ app.post('/message', function(req, res) {
   });
 });
 
+// whatsupdevelop.com 실행
 app.listen(80, function(){
 });