The original robots.txt specification has no concept of "full" URL. Whatever you specify as value for
Disallow is always the start of the URL paths you want to block.
For example, see this robots.txt:
# robots.txt for example.com
This will obviously block
example.com/foobar.html. But it will also block:
So, in your case you just need:
It will block all URLs that begin with the string
But it will also block an URL like (let’s assume it exists)
example.com/addreviewer, of course. Which may or not what you want (depends on all your URLs you use).
So you need to find a part of a starting URL paths that matches to all the URLs you want to have blocked and doesn’t include any others.