How to get request url in ruby Sinatra class context?

Question

In Sinatra you have the possibility to get the request full path by using the following lines:

get '/hello-world' do
  request.path_info   # => '/hello-world'
  request.fullpath    # => '/hello-world?foo=bar'
  request.url         # => 'http://example.com/hello-world?foo=bar'
end

I have several classes I use in my app. In this one particular class I like to compare the request.path_info to a string.

class foo
  def build_menu
    if request.path_info == "/hello-world"
      highlight_menu_entry
    end
  end
end

But the request-Object is not known in this class context and an error is thrown. I though this is a SUPER-GLOBAL like in PHP $_POST or $_GET, if there is some in Ruby/Sinatra.

So how can I check the request.path in a class context?

Answer 1

Found the answer by my myself. I use a self defined global variable $PATHNAME which I can use in any context. Combined with the before do-preprocessor in my main app, I can fill an use the variable.

before do
  $PATHNAME=request.path_info
end

class Foo
  def build_menu
    highlight_menu_entry if $PATHNAME == '/hello-world'
  end
end