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copied!<p>There are a few ways you could do this (these aren't in any order, they're all good):</p> <h3>Namespaces with a before block and a helper</h3> <p><a href="http://rubydoc.info/gems/sinatra-contrib/1.3.2/Sinatra/Namespace">http://rubydoc.info/gems/sinatra-contrib/1.3.2/Sinatra/Namespace</a></p> <pre><code>require 'sinatra/namespace' class App < Sinatra::Base register Sinatra::Namespace namespace "/base" do helpers do # this helper is now namespaced too authenticate! # funky auth stuff # but no need for `pass` end end before do authenticate! end get "/anything" do end get "/you" do end get "/like/here" do end end </code></pre> <h3>Namespace with a condition</h3> <pre><code>require 'sinatra/namespace' class App < Sinatra::Base register Sinatra::Namespace set(:auth) do |*roles| # <- notice the splat here condition do unless logged_in? && roles.any? {|role| current_user.in_role? role } redirect "/login/", 303 end end end namespace "/base", :auth => [:user] do # routes… end namespace "/admin", :auth => [:admin] do # routes… end </code></pre> <h3>Helpers and a before filter</h3> <pre><code>helpers do authenticate! # funky auth stuff # but no need for `pass` end end before '/base/*' do authenticate! end </code></pre> <h3>mapped Apps</h3> <pre><code>class MyBase < Sinatra::Base helpers do authenticate! # funky auth stuff # but no need for `pass` end end before do authenticate! end get "/" do end get "/another" do end end # in rackup file map "/" do run App1 end map "/base" do # every route in MyBase will now be accessed by prepending "/base" # e.g. "/base/" and "/base/another" run MyBase end #… </code></pre> <p>I'm not sure about the need to DRY up routes using a case statement. If the routes each do something different then I'd just write them out separately as it's a lot clearer and you're duplicating the work Sinatra does in matching routes.</p>

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