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'
Set a fixed Cache-Control header for all served files:
use Rack::Static, :root => 'public', :cache_control => 'public'
# File lib/rack/static.rb, line 40 def call(env) path = env["PATH_INFO"] unless @urls.kind_of? Hash can_serve = @urls.any? { |url| path.index(url) == 0 } else can_serve = @urls.key? path end if can_serve env["PATH_INFO"] = @urls[path] if @urls.kind_of? Hash @file_server.call(env) else @app.call(env) end end
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