Question

I use Rails 3.1, Devise and Omniauth.

The problem is that when facebook callbacks to my app
the url ends with #_. Then when in the callback action
I redirect to something – for example /after_signin
the redirect results in /after_signin#_.

Any idea how to remove this anchor from the URL?

EDIT:
It does not matter what I put in the callback function.
Even simple redirect:

class Users::OmniauthCallbacksController < ApplicationController
  def facebook
    redirect_to "/after_callback"
  end
end

it would result in going to /after_callback#_

Even in normal controller if you go to /#_ and you have some redirect ther
it would get redirected to the specified path with #_ appended at the end.

EDIT2:
I just found out that it is the browser fault to preserve the anchor. So it has to be
handled in the frontend side.

Answer 1

If you’re confident that it’s a browser issue, you can just use JavaScript to update the hash portion of the window‘s location object. Maybe something like this:

if (window.location.hash.search('#_') >= 0) {
    window.location.hash = '';
}