I have this web app that is accessible through those different URLs.
URL_1: www.mycustomdomain.com // THIS IS MY CUSTOM DOMAIN (PUBLIC TO THE USERS)
URL_2: www.my-project.firebaseapp.com // THIS IS A DEFAULT FIREBASE URL
URL_3: my-project.web.app // THIS IS A DEFAULT FIREBASE URL
Obviously I want Google to index my pages using my custom domain, and not the Firebase default URLs.
I don't publicize the default URLs anywhere, but what if Google discovers them at some point? What is the proper way of letting Google know that those pages/URLs should NOT be indexed?
OPTION #1
Should I always add a <link rel="canonical" href={"https://www.mycustomdomain.com/some-page"}/>
for each page?
This way, if Google happens to crawl the default URLs, it should see that canonical pointing to the custom domain, right? Is this the correct approach?
OPTION #2
Since I'm dynamically generating the robots.txt
, I could detect that the request is coming from URL_2 or 3
and simply block the entire website from being crawled, by adding Disallow: /
.
How would you solve this?