sockjs/sockjs-node — Issue #17: Support the .pipe method as in nodejs Streams 
Author: majek
Created: 2011-10-11 15:16:10+00:00
State: open

So that you can stream from/to other sockets to the browser
http://nodejs.org/docs/v0.5.7/api/streams.html#stream.pipe

As reported by gdamjan in https://github.com/sockjs/sockjs-client/issues/11