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PK       ! !Êe°  °    index.jsnu „[µü¤        var once = require('once')
var eos = require('end-of-stream')
var fs = require('fs') // we only need fs to get the ReadStream and WriteStream prototypes

var noop = function () {}
var ancient = /^v?\.0/.test(process.version)

var isFn = function (fn) {
  return typeof fn === 'function'
}

var isFS = function (stream) {
  if (!ancient) return false // newer node version do not need to care about fs is a special way
  if (!fs) return false // browser
  return (stream instanceof (fs.ReadStream || noop) || stream instanceof (fs.WriteStream || noop)) && isFn(stream.close)
}

var isRequest = function (stream) {
  return stream.setHeader && isFn(stream.abort)
}

var destroyer = function (stream, reading, writing, callback) {
  callback = once(callback)

  var closed = false
  stream.on('close', function () {
    closed = true
  })

  eos(stream, {readable: reading, writable: writing}, function (err) {
    if (err) return callback(err)
    closed = true
    callback()
  })

  var destroyed = false
  return function (err) {
    if (closed) return
    if (destroyed) return
    destroyed = true

    if (isFS(stream)) return stream.close(noop) // use close for fs streams to avoid fd leaks
    if (isRequest(stream)) return stream.abort() // request.destroy just do .end - .abort is what we want

    if (isFn(stream.destroy)) return stream.destroy()

    callback(err || new Error('stream was destroyed'))
  }
}

var call = function (fn) {
  fn()
}

var pipe = function (from, to) {
  return from.pipe(to)
}

var pump = function () {
  var streams = Array.prototype.slice.call(arguments)
  var callback = isFn(streams[streams.length - 1] || noop) && streams.pop() || noop

  if (Array.isArray(streams[0])) streams = streams[0]
  if (streams.length < 2) throw new Error('pump requires two streams per minimum')

  var error
  var destroys = streams.map(function (stream, i) {
    var reading = i < streams.length - 1
    var writing = i > 0
    return destroyer(stream, reading, writing, function (err) {
      if (!error) error = err
      if (err) destroys.forEach(call)
      if (reading) return
      destroys.forEach(call)
      callback(error)
    })
  })

  return streams.reduce(pipe)
}

module.exports = pump
PK       ! 0‡ªÔ¹  ¹  	  README.mdnu „[µü¤        # pump

pump is a small node module that pipes streams together and destroys all of them if one of them closes.

```
npm install pump
```

[![build status](http://img.shields.io/travis/mafintosh/pump.svg?style=flat)](http://travis-ci.org/mafintosh/pump)

## What problem does it solve?

When using standard `source.pipe(dest)` source will _not_ be destroyed if dest emits close or an error.
You are also not able to provide a callback to tell when then pipe has finished.

pump does these two things for you

## Usage

Simply pass the streams you want to pipe together to pump and add an optional callback

``` js
var pump = require('pump')
var fs = require('fs')

var source = fs.createReadStream('/dev/random')
var dest = fs.createWriteStream('/dev/null')

pump(source, dest, function(err) {
  console.log('pipe finished', err)
})

setTimeout(function() {
  dest.destroy() // when dest is closed pump will destroy source
}, 1000)
```

You can use pump to pipe more than two streams together as well

``` js
var transform = someTransformStream()

pump(source, transform, anotherTransform, dest, function(err) {
  console.log('pipe finished', err)
})
```

If `source`, `transform`, `anotherTransform` or `dest` closes all of them will be destroyed.

Similarly to `stream.pipe()`, `pump()` returns the last stream passed in, so you can do:

```
return pump(s1, s2) // returns s2
```

If you want to return a stream that combines *both* s1 and s2 to a single stream use
[pumpify](https://github.com/mafintosh/pumpify) instead.

## License

MIT

## Related

`pump` is part of the [mississippi stream utility collection](https://github.com/maxogden/mississippi) which includes more useful stream modules similar to this one.
PK       ! 8ñôA:   :     .travis.ymlnu „[µü¤        language: node_js
node_js:
  - "0.10"

script: "npm test"
PK       ! ´Ùƒ6  6    LICENSEnu „[µü¤        The MIT License (MIT)

Copyright (c) 2014 Mathias Buus

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.PK       ! ‚{ÂPÎ  Î    package.jsonnu „[µü¤        {
  "_from": "pump@^3.0.0",
  "_id": "pump@3.0.0",
  "_inBundle": false,
  "_integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
  "_location": "/pump",
  "_phantomChildren": {},
  "_requested": {
    "type": "range",
    "registry": true,
    "raw": "pump@^3.0.0",
    "name": "pump",
    "escapedName": "pump",
    "rawSpec": "^3.0.0",
    "saveSpec": null,
    "fetchSpec": "^3.0.0"
  },
  "_requiredBy": [
    "/mississippi"
  ],
  "_resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
  "_shasum": "b4a2116815bde2f4e1ea602354e8c75565107a64",
  "_spec": "pump@^3.0.0",
  "_where": "/Users/rebecca/code/npm/node_modules/mississippi",
  "author": {
    "name": "Mathias Buus Madsen",
    "email": "mathiasbuus@gmail.com"
  },
  "browser": {
    "fs": false
  },
  "bugs": {
    "url": "https://github.com/mafintosh/pump/issues"
  },
  "bundleDependencies": false,
  "dependencies": {
    "end-of-stream": "^1.1.0",
    "once": "^1.3.1"
  },
  "deprecated": false,
  "description": "pipe streams together and close all of them if one of them closes",
  "homepage": "https://github.com/mafintosh/pump#readme",
  "keywords": [
    "streams",
    "pipe",
    "destroy",
    "callback"
  ],
  "license": "MIT",
  "name": "pump",
  "repository": {
    "type": "git",
    "url": "git://github.com/mafintosh/pump.git"
  },
  "scripts": {
    "test": "node test-browser.js && node test-node.js"
  },
  "version": "3.0.0"
}
PK       ! arçÅ”  ”    test-browser.jsnu „[µü¤        var stream = require('stream')
var pump = require('./index')

var rs = new stream.Readable()
var ws = new stream.Writable()

rs._read = function (size) {
  this.push(Buffer(size).fill('abc'))
}

ws._write = function (chunk, encoding, cb) {
  setTimeout(function () {
    cb()
  }, 100)
}

var toHex = function () {
  var reverse = new (require('stream').Transform)()

  reverse._transform = function (chunk, enc, callback) {
    reverse.push(chunk.toString('hex'))
    callback()
  }

  return reverse
}

var wsClosed = false
var rsClosed = false
var callbackCalled = false

var check = function () {
  if (wsClosed && rsClosed && callbackCalled) {
    console.log('test-browser.js passes')
    clearTimeout(timeout)
  }
}

ws.on('finish', function () {
  wsClosed = true
  check()
})

rs.on('end', function () {
  rsClosed = true
  check()
})

var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {
  callbackCalled = true
  check()
})

if (res !== ws) {
  throw new Error('should return last stream')
}

setTimeout(function () {
  rs.push(null)
  rs.emit('close')
}, 1000)

var timeout = setTimeout(function () {
  check()
  throw new Error('timeout')
}, 5000)
PK       ! YEyÛà  à    test-node.jsnu „[µü¤        var pump = require('./index')

var rs = require('fs').createReadStream('/dev/random')
var ws = require('fs').createWriteStream('/dev/null')

var toHex = function () {
  var reverse = new (require('stream').Transform)()

  reverse._transform = function (chunk, enc, callback) {
    reverse.push(chunk.toString('hex'))
    callback()
  }

  return reverse
}

var wsClosed = false
var rsClosed = false
var callbackCalled = false

var check = function () {
  if (wsClosed && rsClosed && callbackCalled) {
    console.log('test-node.js passes')
    clearTimeout(timeout)
  }
}

ws.on('close', function () {
  wsClosed = true
  check()
})

rs.on('close', function () {
  rsClosed = true
  check()
})

var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {
  callbackCalled = true
  check()
})

if (res !== ws) {
  throw new Error('should return last stream')
}

setTimeout(function () {
  rs.destroy()
}, 1000)

var timeout = setTimeout(function () {
  throw new Error('timeout')
}, 5000)
PK         ! !Êe°  °                  index.jsnu „[µü¤        PK         ! 0‡ªÔ¹  ¹  	            è  README.mdnu „[µü¤        PK         ! 8ñôA:   :               Ú  .travis.ymlnu „[µü¤        PK         ! ´Ùƒ6  6              O  LICENSEnu „[µü¤        PK         ! ‚{ÂPÎ  Î              ¼  package.jsonnu „[µü¤        PK         ! arçÅ”  ”              Æ  test-browser.jsnu „[µü¤        PK         ! YEyÛà  à              ™  test-node.jsnu „[µü¤        PK      
  µ#    