added papago.js

+var express = require('express');
+var app = express();
+var client_id = '6hpmInU0TCrQIiiJwgJX';
+var client_secret = 'jpYZbkj0_g';
+// var query = "언어를 감지할 문장을 입력하세요.";
+// app.get('/detectLangs', function (req, res) {
+//    var api_url = 'https://openapi.naver.com/v1/papago/detectLangs';
+//    var request = require('request');
+//    var options = {
+//        url: api_url,
+//        form: {'query': query},
+//        headers: {'X-Naver-Client-Id':client_id, 'X-Naver-Client-Secret': client_secret}
+//     };
+//    request.post(options, function (error, response, body) {
+//      if (!error && response.statusCode == 200) {
+//        console.log(JSON.parse(body).langCode);
+//        res.writeHead(200, {'Content-Type': 'text/json;charset=utf-8'});
+//        res.end(body);
+//      } else {
+//        res.status(response.statusCode).end();
+//        console.log('error = ' + response.statusCode);
+//      }
+//    });
+//  });
+//  app.listen(3000, function () {
+//    console.log('http://127.0.0.1:3000/detectLangs app listening on port 3000!');
+//  });
+
+async function findLanguage(sourceText) {
+  const api_url = 'https://openapi.naver.com/v1/papago/detectLangs';
+  const request = require('request');
+  let options = {
+      url: api_url,
+      form: {'query': sourceText},
+      headers: {'X-Naver-Client-Id':client_id, 'X-Naver-Client-Secret': client_secret}
+  };
+
+  return new Promise((resolve, reject) => {
+    let resultLang = {};
+    
+    request.post(options, function (error, response, body) {
+        if (!error && response.statusCode === 200) {
+            resultLang = JSON.parse(body).langCode
+            console.log(resultLang);
+            resolve(resultLang);
+        }
+        else {
+            console.log('error = ' + response.statusCode);
+            reject("error");
+        }
+    });  
+});
+}
+
+export async function getLang(comment) {
+  const lang =  await findLanguage(comment);
+  return lang;  
+}
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