gistfile1.txt

"use strict";

const querystring = require("querystring");
const request = require('request-promise');

module.exports = async (context, callback) => {
    const article = querystring.escape(context);
    const uri = `https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&titles=${article}&redirects=true`;
    let response = await request({
      uri,
      json: true
    });
    callback(undefined, response.query.pages[Object.keys(response.query.pages)[0]].extract);
};