authorized-static

Authorized Static

This example demonstrates an HTTP Trigger Function serving authorized content from a static path. Client applications pass a matching authorization token pre-defined in the function configuration - functions.config().

Example uses the Express framework.

Code

See file functions/index.js for the code.

The dependencies are listed in functions/package.json.

Setup

1. Clone or download this repo and open the authorized-static directory.
2. If you don't already have one, create a Firebase Project using the Firebase Console.
3. If the Firebase CLI is not install, install it with npm install -g firebase-tools and then configure it with firebase login.
4. Configure the CLI locally by using firebase use --add and select your project in the list.
5. Install dependencies locally by running: cd functions; npm install; cd -
6. Set the static.token function environment variable to an authorization token you define (e.g. UUID string, etc.).

firebase functions:config:set static.token="A_TOKEN_YOU_DEFINE"

IMPORTANT: Remember to set the Authorization header to Bearer <THE_TOKEN_YOU_DEFINED> when making the request!

Deploy

1. Deploy your project using firebase deploy --only functions.

Request from Google Apps Script

Example Google Apps Script to request a static file from the deployed Cloud Function.

...

function getStatic() {

   var response, responseCode;

   // DEVELOPER TODO:  Replace "functionUrl" with the deployed Cloud Function URL from the Firebase Console
   // Consider storing URL in a Google Apps Script Properties Store
   var functionUrl = "https://<FIREBASE_CLOUD_FUNCTION_URL>/authorizedStatic";

   // DEVELOPER TODO:  Replace <TOKEN> with pre-defined token defined in the Cloud Function configuration
   // Consider storing token in a Google Apps Script Properties Store
   var functionToken = "<TOKEN>";

   var filePath = "static";

   // DEVELOPER TODO: Replace <FILENAME> with name of file to retrieve from Cloud Function e.g. "config.yml"
   var fileName = "<FILENAME>";

   var params = {
     'method': 'GET',
     'headers': {
         'Authorization': 'Bearer ' + functionToken
      }
   };

   response = UrlFetchApp.fetch(functionUrl + "/" + filePath + "/" + fileName, params);
   responseCode = response.getResponseCode();

   if (responseCode == 200) {
      // Success fetching file from Cloud Function
      return response.getContentText();
   } else {
      // Error returned from Cloud Function
      Logger.log('Error fetching file.  Response code: ' + responseCode);
      return null;
   }

}

...

License

© Laura Taylor. Licensed under an MIT license.