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/proc/thread-self/root/proc/self/root/var/runtime/node_modules/@aws-sdk/node_modules/pump

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index.js2.2 KB · 87 lines
var once = require('once')var eos = require('end-of-stream')var fs try {  fs = require('fs') // we only need fs to get the ReadStream and WriteStream prototypes} catch (e) {} var noop = function () {}var ancient = typeof process === 'undefined' ? false : /^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