Google Cloud Run to localhost

IAP-protected redirect to localhost running as a service on Google Cloud Run

Integrating with gcrtl URLs

Usage

import * as gcrtl from 'gcrtl';

console.log(gcrtl.path('http://localhost:3000/foo/bar')); // '/foo/bar'
console.log(gcrtl.port('http://localhost:3000/foo/bar')); // 3000

console.log(
  gcrtl.path('https://<gcrtl identifier>.run.app/http/localhost:3000/foo/bar')
); // '/foo/bar'
console.log(
  gcrtl.port('https://<gcrtl identifier>.run.app/http/localhost:3000/foo/bar')
); // 3000

…and when ports are not included in the URL, it falls back to the relevant protocils to identify the expected port.

Running the app

Install

Prerequisites: a Google Cloud account with billing enabled.

Clone the repo, install dev dependencies, and deploy:

git clone ssh://[email protected]/battis/google-cloud-run-to-localhost.git path/to/project
cd path/to/project
pnpm i -D
pnpm run deploy

Configure

The initial deploy will configure a .env file appropriately to eliminate the interactive wizard for future deployments.

To give domain users access to the redirect tool, run deploy with --user flags:

cd path/to/project
./scripts/deploy --user [email protected] --user [email protected]

Use

The resulting run.app URL can be used, for example, as an OAuth redirect URL for use with, for example, oauth2-cli. Set the OAuth redirect URL on the server to https://<Cloud Run service subdomain>.run.app/http/localhost:3000/path/to/redirect and it will be redirect to http://localhost:3000/path/to/redirect upon receipt.