call_rack_rdoc.rb

# File lib/rack/sendfile.rb, line 112
def call(env)
  status, headers, body = @app.call(env)
  if body.respond_to?(:to_path)
    case type = variation(env)
    when 'X-Accel-Redirect'
      path = F.expand_path(body.to_path)
      if url = map_accel_path(env, path)
        headers[CONTENT_LENGTH] = '0'
        headers[type] = url
        obody = body
        body = Rack::BodyProxy.new([]) do
          obody.close if obody.respond_to?(:close)
        end
      else
        env['rack.errors'].puts "X-Accel-Mapping header missing"
      end
    when 'X-Sendfile', 'X-Lighttpd-Send-File'
      path = F.expand_path(body.to_path)
      headers[CONTENT_LENGTH] = '0'
      headers[type] = path
      obody = body
      body = Rack::BodyProxy.new([]) do
        obody.close if obody.respond_to?(:close)
      end
    when '', nil
    else
      env['rack.errors'].puts "Unknown x-sendfile variation: '#{type}'.\n"
    end
  end
  [status, headers, body]
end