\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/alt/alt-nodejs9/root/lib/node_modules/npm/node_modules/cacache/lib/content/

Viewing File: read.js

'use strict'

const BB = require('bluebird')

const contentPath = require('./path')
const fs = require('graceful-fs')
const PassThrough = require('stream').PassThrough
const pipe = BB.promisify(require('mississippi').pipe)
const ssri = require('ssri')
const Y = require('../util/y.js')

BB.promisifyAll(fs)

module.exports = read
function read (cache, integrity, opts) {
  opts = opts || {}
  return pickContentSri(cache, integrity).then(content => {
    const sri = content.sri
    const cpath = contentPath(cache, sri)
    return fs.readFileAsync(cpath, null).then(data => {
      if (typeof opts.size === 'number' && opts.size !== data.length) {
        throw sizeError(opts.size, data.length)
      } else if (ssri.checkData(data, sri)) {
        return data
      } else {
        throw integrityError(sri, cpath)
      }
    })
  })
}

module.exports.stream = readStream
module.exports.readStream = readStream
function readStream (cache, integrity, opts) {
  opts = opts || {}
  const stream = new PassThrough()
  pickContentSri(
    cache, integrity
  ).then(content => {
    const sri = content.sri
    return pipe(
      fs.createReadStream(contentPath(cache, sri)),
      ssri.integrityStream({
        integrity: sri,
        size: opts.size
      }),
      stream
    )
  }).catch(err => {
    stream.emit('error', err)
  })
  return stream
}

if (fs.copyFile) {
  module.exports.copy = copy
}
function copy (cache, integrity, dest, opts) {
  opts = opts || {}
  return pickContentSri(cache, integrity).then(content => {
    const sri = content.sri
    const cpath = contentPath(cache, sri)
    return fs.copyFileAsync(cpath, dest).then(() => content.size)
  })
}

module.exports.hasContent = hasContent
function hasContent (cache, integrity) {
  if (!integrity) { return BB.resolve(false) }
  return pickContentSri(cache, integrity)
  .catch({code: 'ENOENT'}, () => false)
  .catch({code: 'EPERM'}, err => {
    if (process.platform !== 'win32') {
      throw err
    } else {
      return false
    }
  }).then(content => {
    if (!content.sri) return false
    return ({ sri: content.sri, size: content.stat.size })
  })
}

module.exports._pickContentSri = pickContentSri
function pickContentSri (cache, integrity) {
  const sri = ssri.parse(integrity)
  // If `integrity` has multiple entries, pick the first digest
  // with available local data.
  const algo = sri.pickAlgorithm()
  const digests = sri[algo]
  if (digests.length <= 1) {
    const cpath = contentPath(cache, digests[0])
    return fs.lstatAsync(cpath).then(stat => ({ sri: digests[0], stat }))
  } else {
    return BB.any(sri[sri.pickAlgorithm()].map(meta => {
      return pickContentSri(cache, meta)
    }))
  }
}

function sizeError (expected, found) {
  var err = new Error(Y`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`)
  err.expected = expected
  err.found = found
  err.code = 'EBADSIZE'
  return err
}

function integrityError (sri, path) {
  var err = new Error(Y`Integrity verification failed for ${sri} (${path})`)
  err.code = 'EINTEGRITY'
  err.sri = sri
  err.path = path
  return err
}