How to get bearer token passed through header in rails?

Your method will work correctly as it is, you just need to use the correct quotes in the request.

Using single quotes ' doesn't work, where as double quotes " does.

For reference, rails handles tokens from the Authorization: header in any of the following formats with the authenticate_with_http_token method:

Bearer "token_goes_here"
Bearer token_goes_here
Bearer token="token_goes_here"
Bearer token=token_goes_here
Token token="token_goes_here"
Token token=token_goes_here
Token "token_goes_here"
Token token_goes_here

I'm sure this list is not exhaustive, but hopefully gives an idea of what is possible.

You could get the Bearer token with a method like:

def bearer_token
  pattern = /^Bearer /
  header  = request.headers['Authorization']
  header.gsub(pattern, '') if header && header.match(pattern)
end

Also, when setting the header it should be:

Authorization: Bearer 'aUthEnTicAtIonTokeN'