40 lines
912 B
JavaScript
40 lines
912 B
JavaScript
var duplexer = require('duplexer')
|
|
|
|
module.exports = function () {
|
|
|
|
var streams = [].slice.call(arguments)
|
|
, first = streams[0]
|
|
, last = streams[streams.length - 1]
|
|
, thepipe = duplexer(first, last)
|
|
|
|
if(streams.length == 1)
|
|
return streams[0]
|
|
else if (!streams.length)
|
|
throw new Error('connect called with empty args')
|
|
|
|
//pipe all the streams together
|
|
|
|
function recurse (streams) {
|
|
if(streams.length < 2)
|
|
return
|
|
streams[0].pipe(streams[1])
|
|
recurse(streams.slice(1))
|
|
}
|
|
|
|
recurse(streams)
|
|
|
|
function onerror () {
|
|
var args = [].slice.call(arguments)
|
|
args.unshift('error')
|
|
thepipe.emit.apply(thepipe, args)
|
|
}
|
|
|
|
//es.duplex already reemits the error from the first and last stream.
|
|
//add a listener for the inner streams in the pipeline.
|
|
for(var i = 1; i < streams.length - 1; i ++)
|
|
streams[i].on('error', onerror)
|
|
|
|
return thepipe
|
|
}
|
|
|