it-goodbye
Add a goodbye handshake to a duplex async iterable.
In a uniplex stream, the end event signifies the end of the stream. But a duplex stream, it's a little more complicated - there are two paired streams that may end independently. node's net module has an allowHalfOpen mode, but support for this method is patchy - more often, by default duplex streams are like a telephone - when one side hangs up, both streams are terminated. Humans deal with this problem by moving stream termination into the "application" layer - it's polite to say "goodbye", and to wait to receive "goodbye" before call termination.
Example
Given another duplex stream, wrap it with it-goodbye.
goodbye(stream, goodbye_message) takes a duplex stream and a message
(by default, the string "GOODBYE"), this must be encodable whatever codec
the stream uses. The codec should probably be applied outside of it-goodbye.
var goodbye = require('it-goodbye')
// a duplex stream from somewhere...
var duplex = whatever.createStream()
return goodbye(duplex, 'GoodBye')License
MIT