request.js

import fetch from 'node-fetch';
import btoa from 'btoa';



function serverCallMaker(user, pass, baseUrl) {
  const hash = btoa(`${user}:${pass}`);
  const Authorization = `Basic ${hash}`;
  const Accept = 'application/json; odata=verbose';
  const params = {
    method: 'get',
    headers: {Authorization, Accept}
  };
  
  return (url) => fetch(baseUrl + url, params).then(r => r.json());
}


const USERNAME = 'nikpour';
const PASSWORD = '123QWE!@#';
const baseUrl  = 'http://78.111.2.149:8030/nikpour/_api/Web';

export const getData = serverCallMaker(USERNAME, PASSWORD, baseUrl);


const TaskListURL = "/Lists(guid'E37AAEB7-AAAD-422A-9566-15F3DC07CC94')/items";
const ProjectListURL = "/Lists(guid'DEBF6BEF-A3CF-4272-80CC-46287AE98E32')/items";

export const getAllTasks = getData.bind(null, TaskListURL);
export const getAllProjects = getData.bind(null, ProjectListURL);

test.js

import {getAllTasks, getAllProjects} from './request.js';



const log = console::console.log;
const err = console::console.error;

async function test() {
  try {
    const tasks = await getAllTasks();
    log(tasks.d.results);
    
    const projs = await getAllProjects();
    log(projs.d.results);
  }
  catch(e) {
    err(e.stack);
  }
}

test();

Fun with ES2015

First do:

$ npm i node-fetch btoa babel

Then you can run it like this:

$ ./node_modules/.bin/babel-node --stage 0 ./test.js