PuerkitoBio/fetchbot — pull request #2 by ncabatoff (2014-05-10 21:07:40+00:00)
Title: Extract HostFetcher out of Fetcher

These changesets split Fetcher in two. HostFetcher is a new type that handles all the actual HTTP work for a single host. Fetcher retains all the queue management, and the code that manages HostFetchers, spawning and retiring them as needed.