How to serve static files via Rack?

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To redirect every request to a particular path, use Rack::File (for some reason this class is absent in recent documentation, but it is still part of the latest Rack):

run Rack::File.new("/my/path")

To redirect every request, and add an HTML index of all files in the target dir, use Rack::Directory:

run Rack::Directory.new("/my/path")

To combine several directories or serve only a some requests from the target dir:

map "/url/prefix" do
  run Rack::File.new("/my/path")
end

# More calls to map if necessary...

# All other requests.
run MyApp.new

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