画像のURLから画像ファイルを取得してFirebase Storageに保存する例

Node.js, How to store Image from URL to Firebase Storage?
https://stackoverflow.com/questions/52661914/node-js-how-to-store-image-from-url-to-firebase-storage
への回答の例

const functions = require('firebase-functions');
const admin     = require('firebase-admin');
const request   = require('request')

admin.initializeApp();

# 略

const getImageFromUrl = async (imgURL) => {
    const imgURL = "https://2017.brucon.org/images/b/bc/Twitter_logo.jpg";
    const ary = imgURL.split('?')[0].split('/');
    const imageName = ary.slice(-1)[0]

    try {
        const newFile    = storage.bucket().file(imageName);
        const blobStream = newFile.createWriteStream({ metadata: "image/jpg" });
        await request(imgURL).pipe(blobStream);
    } catch (error) {
        console.log(error);
    }
};