Rack::Worker is a simple project from Heroku’s Chris Continanza for serving up results from backgrounded processes in Rack:
class App < Sinatra::Base
get '/long_ass_request' do
The server serves up HTTP 202 responses until the background job is finished, and then it serves up the results of your job. It ships with integration for Dalli and queue_classic out of the box.
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Linked by Wynn Netherland on Apr 20, 2012