test.js

var express = require('express');
var app = express();
require('dotenv').config();
var client_id = process.env.PAPAGO_CLIENT_ID;
var client_secret = process.env.PAPAGO_CLIENT_SECRET;
var query = 'hello';
app.get('/translate', function (req, res) {
  var api_url = 'https://openapi.naver.com/v1/papago/n2mt';
  var request = require('request');
  var options = {
    url: api_url,
    form: { source: 'en', target: 'ko', text: 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) {
      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/translate app listening on port 3000!');
});