CODEWITHSUNDEEP
firebasegoogle-cloud-functionsgoogle-search-console
Nick Felker
Nick Felker

Reputation: 11968

How to perform domain verification for Firebase functions

I'd like to use Google's Webmaster Tools to add domain verification for my "site", which is entirely made up of Cloud Functions for Firebase:

https://us-central1-<project-id>.cloudfunctions.net/

However I cannot figure out how to do this in a way that would work successfully.

The recommended way is to download and serve an HTML file with a verification key. However, I cannot seem to create a function with a dot.

exports['googleKEY.html'] = functions...

This fails when trying to deploy.

An alternative is to put a meta tag in my "homepage", but that also does not work as I cannot seem to create an index page.

exports[''] = functions...

and

exports['index.html'] = functions...

Also fail.

Is there a way to do this domain verification just through functions? I'd appreciate guidance.

Upvotes: 13

Views: 3486

Answers (2)

Valentin
Valentin

Reputation: 5598

I had the same problem: I wanted to validate my Domain Ownership in the Google Search Console. But the domain is actually a Firebase Cloud Functions domain (https://*.cloudfunctions.net). I found a super easy solution today:

1) When adding a property in Google Search Console, select the method "URL prefix" and enter the url of the function you will create in step 3 (i.e. https://foobar.cloudfunctions.net/googleDomainVerification).

2) Select the method "HTML tag" and copy the meta-tag.

3) Create a https function that you push on Firebase Cloud Function. Don't forget to copy your meta-tag from step 2:

exports.googleDomainVerification = functions.https.onRequest((req, res) => {
    res.status(200).send('<!DOCTYPE html> <html> <head> YOUR_META_TAG_HERE </head> <body> </body> </html>')
})

4) Wait a minute then press "Verify" on the Google Search Console

That's it. Everything should work now :)

Upvotes: 9

hKaspy
hKaspy

Reputation: 135

So... I think I finally may have a solution.

There is no direct way to verify a Firebase Functions domain (https://*.cloudfunctions.net) BUT verifying Firebase Hosting domain (https://*.firebaseapp.com) is easy (using verification file). So let's start with that.

There is a config option in Hosting to setup url rewrite to serve a Function. (Documented here)

This is a modified example config from the link above, opening url https://<your-project-id>.firebaseapp.com/covertFnBigben to invoke Function bigben.

{
  "hosting": {
    "public": "public",

    // Add the following rewrites section *within* "hosting"
    "rewrites": [
      {
        "source": "/covertFnBigben", "function": "bigben"
      }
    ]
  }
}

So after successfull verification of your Firebase Hosting domain you can use that domain to call Firebase Functions.

Upvotes: 4

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