routes.rb

  map.connect 'lists/:fbuid',
    :controller => 'lists',
    :action => 'index',
    :conditions => { :method => :get }

  map.connect 'lists/:fbuid',
    :controller => 'lists',
    :action => 'create',
    :conditions => { :method => :post }

  map.connect 'lists/:fbuid/:asin',
    :controller => 'lists',
    :action => 'update',
    :conditions => { :method => :put }

  map.connect 'lists/:fbuid/:asin',
    :controller => 'lists',
    :action => 'destroy',
    :conditions => { :method => :delete }

  map.connect 'lists/:fbuid/:asin',
    :controller => 'lists',
    :action => 'show',
    :conditions => { :method => :get }

  map.connect 'lists/:fbuid',
    :controller => 'lists'
  map.connect 'lists/:fbuid/:asin',
    :controller => 'lists'