You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
1.1 KiB
70 lines
1.1 KiB
/*!
|
|
* unpipe
|
|
* Copyright(c) 2015 Douglas Christopher Wilson
|
|
* MIT Licensed
|
|
*/
|
|
|
|
'use strict'
|
|
|
|
/**
|
|
* Module exports.
|
|
* @public
|
|
*/
|
|
|
|
module.exports = unpipe
|
|
|
|
/**
|
|
* Determine if there are Node.js pipe-like data listeners.
|
|
* @private
|
|
*/
|
|
|
|
function hasPipeDataListeners(stream) {
|
|
var listeners = stream.listeners('data')
|
|
|
|
for (var i = 0; i < listeners.length; i++) {
|
|
if (listeners[i].name === 'ondata') {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
/**
|
|
* Unpipe a stream from all destinations.
|
|
*
|
|
* @param {object} stream
|
|
* @public
|
|
*/
|
|
|
|
function unpipe(stream) {
|
|
if (!stream) {
|
|
throw new TypeError('argument stream is required')
|
|
}
|
|
|
|
if (typeof stream.unpipe === 'function') {
|
|
// new-style
|
|
stream.unpipe()
|
|
return
|
|
}
|
|
|
|
// Node.js 0.8 hack
|
|
if (!hasPipeDataListeners(stream)) {
|
|
return
|
|
}
|
|
|
|
var listener
|
|
var listeners = stream.listeners('close')
|
|
|
|
for (var i = 0; i < listeners.length; i++) {
|
|
listener = listeners[i]
|
|
|
|
if (listener.name !== 'cleanup' && listener.name !== 'onclose') {
|
|
continue
|
|
}
|
|
|
|
// invoke the listener
|
|
listener.call(stream)
|
|
}
|
|
}
|