Firebase Hosting Fetch All Files

README.md

Fetch All Files from Firebase Hosting

This script fetches all of the files from the currently deployed version of a Firebase Hosting site. You must be signed in via the Firebase CLI and have "Site Viewer" permission on the site in question to be able to properly run the script.

Running using node

 env FIREBASE_TOKEN=`cat <file_where_firebasetoken is saved>` fetchFiles.js <my-site>

Where <site_name> is your Firebase Hosting site (e.g. my-site from my-site.firebaseapp.com). The files will be downloaded into a folder <site_name>_<version_id> where the version ID is the current version of your site.

Environment

node --version
v16.13.0

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.3 LTS
Release:        20.04
Codename:       focal

uname -vosri
Linux 4.4.0-19041-Microsoft #1237-Microsoft Sat Sep 11 14:32:00 PST 2021 x86_64 GNU/Linux

fetchFiles.js

#!/usr/bin/env node

const api = require('firebase-tools/lib/api');
const requireAuth = require('firebase-tools/lib/requireAuth');
const fs = require('fs-extra');
const request = require('request');

if (!process.argv[2]) {
    console.error(`
ERROR: Must supply a site name. Usage:
  node fetchFiles.js <site_name>`);
  process.exit(1);
}

const site = process.argv[2];

async function getLatestVersionName() {
  const result = await api.request('GET', `/v1beta1/sites/${site}/releases?pageSize=1`, {
    auth: true,
    origin: api.hostingApiOrigin,
  });
  const release = (result.body.releases || [])[0];
  if (release) {
    return release.version.name;
  }
  return null;
}

const LIST_PAGE_SIZE = 1000;
async function listFiles(versionName, existing = [], pageToken = null) {
  const result = await api.request('GET', `/v1beta1/${versionName}/files?pageSize=${LIST_PAGE_SIZE}${pageToken ? `&pageToken=${pageToken}` : ''}`, {auth: true, origin: api.hostingApiOrigin});
  result.body.files.forEach(file => existing.push(file.path));
  if (result.body.nextPageToken) {
    return await listFiles(versionName, existing, result.body.nextPageToken);
  }
  return existing;
}

const MAX_FETCHES = 100;

(async function() {
  try {
    await requireAuth.requireAuth({}, ['https://www.googleapis.com/auth/cloud-platform']);
    const v = await getLatestVersionName();
    const vid = v.split('/')[v.split('/').length - 1];
    const toFetch = await listFiles(v);
    const dirName = `${site}_${vid}`;
    let fetchesOutstanding = 0;
    let fetchCount = 0;
    function fetch() {
      if (fetchesOutstanding >= MAX_FETCHES) {
        return;
      } else if (toFetch.length === 0) {
        console.log();
        console.log("Complete. Fetched", fetchCount, "files.");
        return;
      }

      const f = toFetch.shift();
      console.log('Fetching', f);
      fetchesOutstanding++;
      fetchCount++;
      fs.ensureFileSync(dirName + f);
      const q = request(`https://${site}.firebaseapp.com${f}`)
      const ws = fs.createWriteStream(dirName + f);
      q.pipe(ws);
      ws.on('finish', () => {
        console.log('Fetched ', f);
        fetchesOutstanding--;
        fetch();
      });
    }

    fetch();
  } catch (e) {
    console.error("ERROR:", e.stack);
    process.exit(1);
  }
})();

package.json

{
  "name": "firebase-hosting-fetch-version",
  "version": "0.1.1",
  "bin": "./fetchFiles.js",
  "dependencies": {
    "firebase-tools": "9.21.0",
    "fs-extra": "10.0.0",
    "request": "2.88.2"
  }
}