module Rack # The Rack::Static middleware intercepts requests for static files # (javascript files, images, stylesheets, etc) based on the url prefixes or # route mappings passed in the options, and serves them using a Rack::File # object. This allows a Rack stack to serve both static and dynamic content. # # Examples: # # Serve all requests beginning with /media from the "media" folder located # in the current directory (ie media/*): # # use Rack::Static, :urls => ["/media"] # # Serve all requests beginning with /css or /images from the folder "public" # in the current directory (ie public/css/* and public/images/*): # # use Rack::Static, :urls => ["/css", "/images"], :root => "public" # # Serve all requests to / with "index.html" from the folder "public" in the # current directory (ie public/index.html): # # use Rack::Static, :urls => {"/" => 'index.html'}, :root => 'public' # # Serve all requests normally from the folder "public" in the current # directory but uses index.html as default route for "/" # # use Rack::Static, :urls => [""], :root => 'public', :index => # 'public/index.html' # # Set a fixed Cache-Control header for all served files: # # use Rack::Static, :root => 'public', :cache_control => 'public' # class Static def initialize(app, options={}) @app = app @urls = options[:urls] || ["/favicon.ico"] @index = options[:index] root = options[:root] || Dir.pwd cache_control = options[:cache_control] @file_server = Rack::File.new(root, cache_control) end def overwrite_file_path(path) @urls.kind_of?(Hash) && @urls.key?(path) || @index && path == '/' end def route_file(path) @urls.kind_of?(Array) && @urls.any? { |url| path.index(url) == 0 } end def can_serve(path) route_file(path) || overwrite_file_path(path) end def call(env) path = env["PATH_INFO"] if can_serve(path) env["PATH_INFO"] = (path == '/' ? @index : @urls[path]) if overwrite_file_path(path) @file_server.call(env) else @app.call(env) end end end end