Rails core - Jul 2013 - Hide URL from View in rails by defining the post action to external URL in controller

I have a button as below.

<%= button_to(''On'', @userdetail.url +
''?value=1'', :method => "post", :remote =>
true, :disable_with => ''loading...'') %>

In the button above, @userdetail.url is an external url. But I don''t
want
to show that external url when somebody does a view source. 
Is there any way I can achieve it. 
Writing a controller action will do so, but I am not able to make 
everything work through controller action. 
Here''s what I tried. 
In a controller action how can I define a post method. 
Should I execute a curl post call to achieve this.

Should I try something like this in controller action.

def button_action
   @userdetail = Userdetail.find(params[:id])
   curl @userdetail.url + "?value=" + value    
end

and define a route. I tried this but it didn''t work.

Any live example to do a post to external URL via controller action and 
using the same in the button_to will help.

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