Beta 7 with some repo names changed.
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+82
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var once = require('once')
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var eos = require('end-of-stream')
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var fs = require('fs') // we only need fs to get the ReadStream and WriteStream prototypes
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var noop = function () {}
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var ancient = /^v?\.0/.test(process.version)
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var isFn = function (fn) {
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return typeof fn === 'function'
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}
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var isFS = function (stream) {
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if (!ancient) return false // newer node version do not need to care about fs is a special way
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if (!fs) return false // browser
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return (stream instanceof (fs.ReadStream || noop) || stream instanceof (fs.WriteStream || noop)) && isFn(stream.close)
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}
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var isRequest = function (stream) {
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return stream.setHeader && isFn(stream.abort)
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}
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var destroyer = function (stream, reading, writing, callback) {
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callback = once(callback)
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var closed = false
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stream.on('close', function () {
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closed = true
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})
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eos(stream, {readable: reading, writable: writing}, function (err) {
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if (err) return callback(err)
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closed = true
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callback()
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})
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var destroyed = false
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return function (err) {
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if (closed) return
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if (destroyed) return
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destroyed = true
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if (isFS(stream)) return stream.close(noop) // use close for fs streams to avoid fd leaks
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if (isRequest(stream)) return stream.abort() // request.destroy just do .end - .abort is what we want
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if (isFn(stream.destroy)) return stream.destroy()
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callback(err || new Error('stream was destroyed'))
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}
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}
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var call = function (fn) {
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fn()
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}
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var pipe = function (from, to) {
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return from.pipe(to)
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}
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var pump = function () {
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var streams = Array.prototype.slice.call(arguments)
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var callback = isFn(streams[streams.length - 1] || noop) && streams.pop() || noop
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if (Array.isArray(streams[0])) streams = streams[0]
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if (streams.length < 2) throw new Error('pump requires two streams per minimum')
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var error
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var destroys = streams.map(function (stream, i) {
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var reading = i < streams.length - 1
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var writing = i > 0
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return destroyer(stream, reading, writing, function (err) {
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if (!error) error = err
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if (err) destroys.forEach(call)
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if (reading) return
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destroys.forEach(call)
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callback(error)
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})
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})
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return streams.reduce(pipe)
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}
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module.exports = pump
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+28
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{
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"name": "pump",
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"version": "3.0.0",
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"repository": "git://github.com/mafintosh/pump.git",
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"license": "MIT",
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"description": "pipe streams together and close all of them if one of them closes",
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"browser": {
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"fs": false
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},
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"keywords": [
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"streams",
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"pipe",
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"destroy",
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"callback"
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],
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"author": "Mathias Buus Madsen <mathiasbuus@gmail.com>",
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"dependencies": {
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"end-of-stream": "^1.1.0",
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"once": "^1.3.1"
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},
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"scripts": {
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"test": "node test-browser.js && node test-node.js"
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}
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,"_resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz"
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,"_integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww=="
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,"_from": "pump@^3.0.0"
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}
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+66
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var stream = require('stream')
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var pump = require('./index')
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var rs = new stream.Readable()
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var ws = new stream.Writable()
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rs._read = function (size) {
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this.push(Buffer(size).fill('abc'))
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}
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ws._write = function (chunk, encoding, cb) {
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setTimeout(function () {
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cb()
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}, 100)
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}
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var toHex = function () {
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var reverse = new (require('stream').Transform)()
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reverse._transform = function (chunk, enc, callback) {
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reverse.push(chunk.toString('hex'))
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callback()
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}
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return reverse
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}
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var wsClosed = false
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var rsClosed = false
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var callbackCalled = false
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var check = function () {
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if (wsClosed && rsClosed && callbackCalled) {
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console.log('test-browser.js passes')
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clearTimeout(timeout)
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}
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}
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ws.on('finish', function () {
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wsClosed = true
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check()
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})
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rs.on('end', function () {
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rsClosed = true
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check()
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})
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var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {
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callbackCalled = true
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check()
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})
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if (res !== ws) {
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throw new Error('should return last stream')
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}
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setTimeout(function () {
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rs.push(null)
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rs.emit('close')
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}, 1000)
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var timeout = setTimeout(function () {
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check()
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throw new Error('timeout')
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}, 5000)
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+53
@@ -0,0 +1,53 @@
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var pump = require('./index')
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var rs = require('fs').createReadStream('/dev/random')
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var ws = require('fs').createWriteStream('/dev/null')
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var toHex = function () {
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var reverse = new (require('stream').Transform)()
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reverse._transform = function (chunk, enc, callback) {
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reverse.push(chunk.toString('hex'))
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callback()
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}
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return reverse
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}
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var wsClosed = false
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var rsClosed = false
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var callbackCalled = false
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var check = function () {
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if (wsClosed && rsClosed && callbackCalled) {
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console.log('test-node.js passes')
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clearTimeout(timeout)
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}
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}
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ws.on('close', function () {
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wsClosed = true
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check()
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})
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rs.on('close', function () {
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rsClosed = true
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check()
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})
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var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {
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callbackCalled = true
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check()
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})
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if (res !== ws) {
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throw new Error('should return last stream')
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}
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setTimeout(function () {
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rs.destroy()
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}, 1000)
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var timeout = setTimeout(function () {
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throw new Error('timeout')
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}, 5000)
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