New returns a new and operational Traffic processor.

SiteChan returns a channel to receive all inputs before close.

SiteChanFuncErr returns a channel to receive all results of generator `gen` until `err != nil` before close.

SiteChanFuncNok returns a channel to receive all results of generator `gen` until `!ok` before close.

SiteChanSlice returns a channel to receive all inputs before close.

SiteMakeChan returns a new open channel (simply a 'chan Site' that is).

SiteSendProxy returns a channel to serve as a sending proxy to 'out'.

SiteTubeFunc returns a closure around PipeSiteFunc (_, act).

Site represents what travels: an URL which may have a Parent URL, and a Depth.

Traffic goes around inside a circular Site pipe network, e.

SiteWaiter - as implemented by `*sync.WaitGroup` - attends Flapdoors and keeps counting who enters and who leaves.