FM / send

/var/www/myprog.com.ua/server/node/node_modules/send/

/var/www/myprog.com.ua/server/node/node_modules/send

Name	Size	Mode	Actions
HISTORY.md	14801	0644	edit dl rm
index.js	20341	0644	edit dl rm
LICENSE	1128	0644	edit dl rm
package.json	1589	0644	edit dl rm
README.md	9062	0644	edit dl rm

Edit: /var/www/myprog.com.ua/server/node/node_modules/send/index.js (20341B)

/*!
 * send
 * Copyright(c) 2012 TJ Holowaychuk
 * Copyright(c) 2014-2022 Douglas Christopher Wilson
 * MIT Licensed
 */

'use strict'

/**
 * Module dependencies.
 * @private
 */

var createError = require('http-errors')
var debug = require('debug')('send')
var encodeUrl = require('encodeurl')
var escapeHtml = require('escape-html')
var etag = require('etag')
var fresh = require('fresh')
var fs = require('fs')
var mime = require('mime-types')
var ms = require('ms')
var onFinished = require('on-finished')
var parseRange = require('range-parser')
var path = require('path')
var statuses = require('statuses')
var Stream = require('stream')
var util = require('util')

/**
 * Path function references.
 * @private
 */

var extname = path.extname
var join = path.join
var normalize = path.normalize
var resolve = path.resolve
var sep = path.sep

/**
 * Regular expression for identifying a bytes Range header.
 * @private
 */

var BYTES_RANGE_REGEXP = /^ *bytes=/

/**
 * Maximum value allowed for the max age.
 * @private
 */

var MAX_MAXAGE = 60 * 60 * 24 * 365 * 1000 // 1 year

/**
 * Regular expression to match a path with a directory up component.
 * @private
 */

var UP_PATH_REGEXP = /(?:^|[\\/])\.\.(?:[\\/]|$)/

/**
 * Module exports.
 * @public
 */

module.exports = send

/**
 * Return a `SendStream` for `req` and `path`.
 *
 * @param {object} req
 * @param {string} path
 * @param {object} [options]
 * @return {SendStream}
 * @public
 */

function send (req, path, options) {
  return new SendStream(req, path, options)
}

/**
 * Initialize a `SendStream` with the given `path`.
 *
 * @param {Request} req
 * @param {String} path
 * @param {object} [options]
 * @private
 */

function SendStream (req, path, options) {
  Stream.call(this)

var opts = options || {}

this.options = opts
  this.path = path
  this.req = req

this._acceptRanges = opts.acceptRanges !== undefined
    ? Boolean(opts.acceptRanges)
    : true

this._cacheControl = opts.cacheControl !== undefined
    ? Boolean(opts.cacheControl)
    : true

this._etag = opts.etag !== undefined
    ? Boolean(opts.etag)
    : true

this._dotfiles = opts.dotfiles !== undefined
    ? opts.dotfiles
    : 'ignore'

if (this._dotfiles !== 'ignore' && this._dotfiles !== 'allow' && this._dotfiles !== 'deny') {
    throw new TypeError('dotfiles option must be "allow", "deny", or "ignore"')
  }

this._extensions = opts.extensions !== undefined
    ? normalizeList(opts.extensions, 'extensions option')
    : []

this._immutable = opts.immutable !== undefined
    ? Boolean(opts.immutable)
    : false

this._index = opts.index !== undefined
    ? normalizeList(opts.index, 'index option')
    : ['index.html']

this._lastModified = opts.lastModified !== undefined
    ? Boolean(opts.lastModified)
    : true

this._maxage = opts.maxAge || opts.maxage
  this._maxage = typeof this._maxage === 'string'
    ? ms(this._maxage)
    : Number(this._maxage)
  this._maxage = !isNaN(this._maxage)
    ? Math.min(Math.max(0, this._maxage), MAX_MAXAGE)
    : 0

this._root = opts.root
    ? resolve(opts.root)
    : null
}

/**
 * Inherits from `Stream`.
 */

util.inherits(SendStream, Stream)

/**
 * Emit error with `status`.
 *
 * @param {number} status
 * @param {Error} [err]
 * @private
 */

SendStream.prototype.error = function error (status, err) {
  // emit if listeners instead of responding
  if (hasListeners(this, 'error')) {
    return this.emit('error', createHttpError(status, err))
  }

var res = this.res
  var msg = statuses.message[status] || String(status)
  var doc = createHtmlDocument('Error', escapeHtml(msg))

// clear existing headers
  clearHeaders(res)

// add error headers
  if (err && err.headers) {
    setHeaders(res, err.headers)
  }

// send basic response
  res.statusCode = status
  res.setHeader('Content-Type', 'text/html; charset=UTF-8')
  res.setHeader('Content-Length', Buffer.byteLength(doc))
  res.setHeader('Content-Security-Policy', "default-src 'none'")
  res.setHeader('X-Content-Type-Options', 'nosniff')
  res.end(doc)
}

/**
 * Check if the pathname ends with "/".
 *
 * @return {boolean}
 * @private
 */

SendStream.prototype.hasTrailingSlash = function hasTrailingSlash () {
  return this.path[this.path.length - 1] === '/'
}

/**
 * Check if this is a conditional GET request.
 *
 * @return {Boolean}
 * @api private
 */

SendStream.prototype.isConditionalGET = function isConditionalGET () {
  return this.req.headers['if-match'] ||
    this.req.headers['if-unmodified-since'] ||
    this.req.headers['if-none-match'] ||
    this.req.headers['if-modified-since']
}

/**
 * Check if the request preconditions failed.
 *
 * @return {boolean}
 * @private
 */

SendStream.prototype.isPreconditionFailure = function isPreconditionFailure () {
  var req = this.req
  var res = this.res

// if-match
  var match = req.headers['if-match']
  if (match) {
    var etag = res.getHeader('ETag')
    return !etag || (match !== '*' && parseTokenList(match).every(function (match) {
      return match !== etag && match !== 'W/' + etag && 'W/' + match !== etag
    }))
  }

// if-unmodified-since
  var unmodifiedSince = parseHttpDate(req.headers['if-unmodified-since'])
  if (!isNaN(unmodifiedSince)) {
    var lastModified = parseHttpDate(res.getHeader('Last-Modified'))
    return isNaN(lastModified) || lastModified > unmodifiedSince
  }

return false
}

/**
 * Strip various content header fields for a change in entity.
 *
 * @private
 */

SendStream.prototype.removeContentHeaderFields = function removeContentHeaderFields () {
  var res = this.res

res.removeHeader('Content-Encoding')
  res.removeHeader('Content-Language')
  res.removeHeader('Content-Length')
  res.removeHeader('Content-Range')
  res.removeHeader('Content-Type')
}

/**
 * Respond with 304 not modified.
 *
 * @api private
 */

SendStream.prototype.notModified = function notModified () {
  var res = this.res
  debug('not modified')
  this.removeContentHeaderFields()
  res.statusCode = 304
  res.end()
}

/**
 * Raise error that headers already sent.
 *
 * @api private
 */

SendStream.prototype.headersAlreadySent = function headersAlreadySent () {
  var err = new Error('Can\'t set headers after they are sent.')
  debug('headers already sent')
  this.error(500, err)
}

/**
 * Check if the request is cacheable, aka
 * responded with 2xx or 304 (see RFC 2616 section 14.2{5,6}).
 *
 * @return {Boolean}
 * @api private
 */

SendStream.prototype.isCachable = function isCachable () {
  var statusCode = this.res.statusCode
  return (statusCode >= 200 && statusCode < 300) ||
    statusCode === 304
}

/**
 * Handle stat() error.
 *
 * @param {Error} error
 * @private
 */

SendStream.prototype.onStatError = function onStatError (error) {
  switch (error.code) {
    case 'ENAMETOOLONG':
    case 'ENOENT':
    case 'ENOTDIR':
      this.error(404, error)
      break
    default:
      this.error(500, error)
      break
  }
}

/**
 * Check if the cache is fresh.
 *
 * @return {Boolean}
 * @api private
 */

SendStream.prototype.isFresh = function isFresh () {
  return fresh(this.req.headers, {
    etag: this.res.getHeader('ETag'),
    'last-modified': this.res.getHeader('Last-Modified')
  })
}

/**
 * Check if the range is fresh.
 *
 * @return {Boolean}
 * @api private
 */

SendStream.prototype.isRangeFresh = function isRangeFresh () {
  var ifRange = this.req.headers['if-range']

if (!ifRange) {
    return true
  }

// if-range as etag
  if (ifRange.indexOf('"') !== -1) {
    var etag = this.res.getHeader('ETag')
    return Boolean(etag && ifRange.indexOf(etag) !== -1)
  }

// if-range as modified date
  var lastModified = this.res.getHeader('Last-Modified')
  return parseHttpDate(lastModified) <= parseHttpDate(ifRange)
}

/**
 * Redirect to path.
 *
 * @param {string} path
 * @private
 */

SendStream.prototype.redirect = function redirect (path) {
  var res = this.res

if (hasListeners(this, 'directory')) {
    this.emit('directory', res, path)
    return
  }

if (this.hasTrailingSlash()) {
    this.error(403)
    return
  }

var loc = encodeUrl(collapseLeadingSlashes(this.path + '/'))
  var doc = createHtmlDocument('Redirecting', 'Redirecting to ' + escapeHtml(loc))

// redirect
  res.statusCode = 301
  res.setHeader('Content-Type', 'text/html; charset=UTF-8')
  res.setHeader('Content-Length', Buffer.byteLength(doc))
  res.setHeader('Content-Security-Policy', "default-src 'none'")
  res.setHeader('X-Content-Type-Options', 'nosniff')
  res.setHeader('Location', loc)
  res.end(doc)
}

/**
 * Pipe to `res.
 *
 * @param {Stream} res
 * @return {Stream} res
 * @api public
 */

SendStream.prototype.pipe = function pipe (res) {
  // root path
  var root = this._root

// references
  this.res = res

// decode the path
  var path = decode(this.path)
  if (path === -1) {
    this.error(400)
    return res
  }

// null byte(s)
  if (~path.indexOf('\0')) {
    this.error(400)
    return res
  }

var parts
  if (root !== null) {
    // normalize
    if (path) {
      path = normalize('.' + sep + path)
    }

// malicious path
    if (UP_PATH_REGEXP.test(path)) {
      debug('malicious path "%s"', path)
      this.error(403)
      return res
    }

// explode path parts
    parts = path.split(sep)

// join / normalize from optional root dir
    path = normalize(join(root, path))
  } else {
    // ".." is malicious without "root"
    if (UP_PATH_REGEXP.test(path)) {
      debug('malicious path "%s"', path)
      this.error(403)
      return res
    }

// explode path parts
    parts = normalize(path).split(sep)

// resolve the path
    path = resolve(path)
  }

// dotfile handling
  if (containsDotFile(parts)) {
    debug('%s dotfile "%s"', this._dotfiles, path)
    switch (this._dotfiles) {
      case 'allow':
        break
      case 'deny':
        this.error(403)
        return res
      case 'ignore':
      default:
        this.error(404)
        return res
    }
  }

// index file support
  if (this._index.length && this.hasTrailingSlash()) {
    this.sendIndex(path)
    return res
  }

this.sendFile(path)
  return res
}

/**
 * Transfer `path`.
 *
 * @param {String} path
 * @api public
 */

SendStream.prototype.send = function send (path, stat) {
  var len = stat.size
  var options = this.options
  var opts = {}
  var res = this.res
  var req = this.req
  var ranges = req.headers.range
  var offset = options.start || 0

if (res.headersSent) {
    // impossible to send now
    this.headersAlreadySent()
    return
  }

debug('pipe "%s"', path)

// set header fields
  this.setHeader(path, stat)

// set content-type
  this.type(path)

// conditional GET support
  if (this.isConditionalGET()) {
    if (this.isPreconditionFailure()) {
      this.error(412)
      return
    }

if (this.isCachable() && this.isFresh()) {
      this.notModified()
      return
    }
  }

// adjust len to start/end options
  len = Math.max(0, len - offset)
  if (options.end !== undefined) {
    var bytes = options.end - offset + 1
    if (len > bytes) len = bytes
  }

// Range support
  if (this._acceptRanges && BYTES_RANGE_REGEXP.test(ranges)) {
    // parse
    ranges = parseRange(len, ranges, {
      combine: true
    })

// If-Range support
    if (!this.isRangeFresh()) {
      debug('range stale')
      ranges = -2
    }

// unsatisfiable
    if (ranges === -1) {
      debug('range unsatisfiable')

// Content-Range
      res.setHeader('Content-Range', contentRange('bytes', len))

// 416 Requested Range Not Satisfiable
      return this.error(416, {
        headers: { 'Content-Range': res.getHeader('Content-Range') }
      })
    }

// valid (syntactically invalid/multiple ranges are treated as a regular response)
    if (ranges !== -2 && ranges.length === 1) {
      debug('range %j', ranges)

// Content-Range
      res.statusCode = 206
      res.setHeader('Content-Range', contentRange('bytes', len, ranges[0]))

// adjust for requested range
      offset += ranges[0].start
      len = ranges[0].end - ranges[0].start + 1
    }
  }

// clone options
  for (var prop in options) {
    opts[prop] = options[prop]
  }

// set read options
  opts.start = offset
  opts.end = Math.max(offset, offset + len - 1)

// content-length
  res.setHeader('Content-Length', len)

// HEAD support
  if (req.method === 'HEAD') {
    res.end()
    return
  }

this.stream(path, opts)
}

/**
 * Transfer file for `path`.
 *
 * @param {String} path
 * @api private
 */
SendStream.prototype.sendFile = function sendFile (path) {
  var i = 0
  var self = this

debug('stat "%s"', path)
  fs.stat(path, function onstat (err, stat) {
    var pathEndsWithSep = path[path.length - 1] === sep
    if (err && err.code === 'ENOENT' && !extname(path) && !pathEndsWithSep) {
      // not found, check extensions
      return next(err)
    }
    if (err) return self.onStatError(err)
    if (stat.isDirectory()) return self.redirect(path)
    if (pathEndsWithSep) return self.error(404)
    self.emit('file', path, stat)
    self.send(path, stat)
  })

function next (err) {
    if (self._extensions.length <= i) {
      return err
        ? self.onStatError(err)
        : self.error(404)
    }

var p = path + '.' + self._extensions[i++]

debug('stat "%s"', p)
    fs.stat(p, function (err, stat) {
      if (err) return next(err)
      if (stat.isDirectory()) return next()
      self.emit('file', p, stat)
      self.send(p, stat)
    })
  }
}

/**
 * Transfer index for `path`.
 *
 * @param {String} path
 * @api private
 */
SendStream.prototype.sendIndex = function sendIndex (path) {
  var i = -1
  var self = this

function next (err) {
    if (++i >= self._index.length) {
      if (err) return self.onStatError(err)
      return self.error(404)
    }

var p = join(path, self._index[i])

debug('stat "%s"', p)
    fs.stat(p, function (err, stat) {
      if (err) return next(err)
      if (stat.isDirectory()) return next()
      self.emit('file', p, stat)
      self.send(p, stat)
    })
  }

next()
}

/**
 * Stream `path` to the response.
 *
 * @param {String} path
 * @param {Object} options
 * @api private
 */

SendStream.prototype.stream = function stream (path, options) {
  var self = this
  var res = this.res

// pipe
  var stream = fs.createReadStream(path, options)
  this.emit('stream', stream)
  stream.pipe(res)

// cleanup
  function cleanup () {
    stream.destroy()
  }

// response finished, cleanup
  onFinished(res, cleanup)

// error handling
  stream.on('error', function onerror (err) {
    // clean up stream early
    cleanup()

// error
    self.onStatError(err)
  })

// end
  stream.on('end', function onend () {
    self.emit('end')
  })
}

/**
 * Set content-type based on `path`
 * if it hasn't been explicitly set.
 *
 * @param {String} path
 * @api private
 */

SendStream.prototype.type = function type (path) {
  var res = this.res

if (res.getHeader('Content-Type')) return

var ext = extname(path)
  var type = mime.contentType(ext) || 'application/octet-stream'

debug('content-type %s', type)
  res.setHeader('Content-Type', type)
}

/**
 * Set response header fields, most
 * fields may be pre-defined.
 *
 * @param {String} path
 * @param {Object} stat
 * @api private
 */

SendStream.prototype.setHeader = function setHeader (path, stat) {
  var res = this.res

this.emit('headers', res, path, stat)

if (this._acceptRanges && !res.getHeader('Accept-Ranges')) {
    debug('accept ranges')
    res.setHeader('Accept-Ranges', 'bytes')
  }

if (this._cacheControl && !res.getHeader('Cache-Control')) {
    var cacheControl = 'public, max-age=' + Math.floor(this._maxage / 1000)

if (this._immutable) {
      cacheControl += ', immutable'
    }

debug('cache-control %s', cacheControl)
    res.setHeader('Cache-Control', cacheControl)
  }

if (this._lastModified && !res.getHeader('Last-Modified')) {
    var modified = stat.mtime.toUTCString()
    debug('modified %s', modified)
    res.setHeader('Last-Modified', modified)
  }

if (this._etag && !res.getHeader('ETag')) {
    var val = etag(stat)
    debug('etag %s', val)
    res.setHeader('ETag', val)
  }
}

/**
 * Clear all headers from a response.
 *
 * @param {object} res
 * @private
 */

function clearHeaders (res) {
  for (const header of res.getHeaderNames()) {
    res.removeHeader(header)
  }
}

/**
 * Collapse all leading slashes into a single slash
 *
 * @param {string} str
 * @private
 */
function collapseLeadingSlashes (str) {
  for (var i = 0; i < str.length; i++) {
    if (str[i] !== '/') {
      break
    }
  }

return i > 1
    ? '/' + str.substr(i)
    : str
}

/**
 * Determine if path parts contain a dotfile.
 *
 * @api private
 */

function containsDotFile (parts) {
  for (var i = 0; i < parts.length; i++) {
    var part = parts[i]
    if (part.length > 1 && part[0] === '.') {
      return true
    }
  }

return false
}

/**
 * Create a Content-Range header.
 *
 * @param {string} type
 * @param {number} size
 * @param {array} [range]
 */

function contentRange (type, size, range) {
  return type + ' ' + (range ? range.start + '-' + range.end : '*') + '/' + size
}

/**
 * Create a minimal HTML document.
 *
 * @param {string} title
 * @param {string} body
 * @private
 */

function createHtmlDocument (title, body) {
  return '<!DOCTYPE html>\n' +
    '<html lang="en">\n' +
    '<head>\n' +
    '<meta charset="utf-8">\n' +
    '<title>' + title + '</title>\n' +
    '</head>\n' +
    '<body>\n' +
    '<pre>' + body + '</pre>\n' +
    '</body>\n' +
    '</html>\n'
}

/**
 * Create a HttpError object from simple arguments.
 *
 * @param {number} status
 * @param {Error|object} err
 * @private
 */

function createHttpError (status, err) {
  if (!err) {
    return createError(status)
  }

return err instanceof Error
    ? createError(status, err, { expose: false })
    : createError(status, err)
}

/**
 * decodeURIComponent.
 *
 * Allows V8 to only deoptimize this fn instead of all
 * of send().
 *
 * @param {String} path
 * @api private
 */

function decode (path) {
  try {
    return decodeURIComponent(path)
  } catch (err) {
    return -1
  }
}

/**
 * Determine if emitter has listeners of a given type.
 *
 * The way to do this check is done three different ways in Node.js >= 0.10
 * so this consolidates them into a minimal set using instance methods.
 *
 * @param {EventEmitter} emitter
 * @param {string} type
 * @returns {boolean}
 * @private
 */

function hasListeners (emitter, type) {
  var count = typeof emitter.listenerCount !== 'function'
    ? emitter.listeners(type).length
    : emitter.listenerCount(type)

return count > 0
}

/**
 * Normalize the index option into an array.
 *
 * @param {boolean|string|array} val
 * @param {string} name
 * @private
 */

function normalizeList (val, name) {
  var list = [].concat(val || [])

for (var i = 0; i < list.length; i++) {
    if (typeof list[i] !== 'string') {
      throw new TypeError(name + ' must be array of strings or false')
    }
  }

return list
}

/**
 * Parse an HTTP Date into a number.
 *
 * @param {string} date
 * @private
 */

function parseHttpDate (date) {
  var timestamp = date && Date.parse(date)

return typeof timestamp === 'number'
    ? timestamp
    : NaN
}

/**
 * Parse a HTTP token list.
 *
 * @param {string} str
 * @private
 */

function parseTokenList (str) {
  var end = 0
  var list = []
  var start = 0

// gather tokens
  for (var i = 0, len = str.length; i < len; i++) {
    switch (str.charCodeAt(i)) {
      case 0x20: /*   */
        if (start === end) {
          start = end = i + 1
        }
        break
      case 0x2c: /* , */
        if (start !== end) {
          list.push(str.substring(start, end))
        }
        start = end = i + 1
        break
      default:
        end = i + 1
        break
    }
  }

// final token
  if (start !== end) {
    list.push(str.substring(start, end))
  }

return list
}

/**
 * Set an object of headers on a response.
 *
 * @param {object} res
 * @param {object} headers
 * @private
 */

function setHeaders (res, headers) {
  var keys = Object.keys(headers)

for (var i = 0; i < keys.length; i++) {
    var key = keys[i]
    res.setHeader(key, headers[key])
  }
}

cmd: