cors-proxy

Introduction

CORS Proxy calls with Cloud Functions

Initial setup, build tools and dependencies

1. Clone this repo

git clone [email protected]:7kfpun/cors-proxy.git

2. Create a Firebase project and configure the quickstart

Create a Firebase Project on the Firebase Console.

Set up your Firebase project by running firebase use --add, select your Project ID and follow the instructions.

3. Install the Firebase CLI and enable Functions on your Firebase CLI

You need to have installed the Firebase CLI. If you haven't run:

npm install -g firebase-tools

Doesn't work? You may need to change npm permissions.

Deploy the app to prod

First you need to install the npm dependencies of the functions:

cd functions && npm install; cd ..

This installs locally:

• The Firebase SDK and the Firebase Functions SDK.
• The cors npm package to allow Cross Origin AJAX requests on the endpoint.
• The node-fetch npm package to bring window.fetch to Node.js.

Deploy to Firebase using the following command:

firebase deploy

This deploys and activates the cors Function.

The first time you call firebase deploy on a new project with Functions will take longer than usual.

Try the sample

After deploying the function you can open the following URLs in your browser:

curl https://us-central1-<project-id>.cloudfunctions.net/cors?url=https%3A%2F%2Fapi.ipify.org%3Fformat%3Djson

You can also send the format in the request body. For instance using cURL in the command line:

curl -X POST \
  -H 'Content-Type: application/json' \
  -d '{"url": "https://api.ipify.org/?format=json"}' \
  https://us-central1-<project-id>.cloudfunctions.net/cors

License

Released under the MIT License.