1133 lines
23 KiB
JavaScript
1133 lines
23 KiB
JavaScript
/*!
|
|
* send
|
|
* Copyright(c) 2012 TJ Holowaychuk
|
|
* Copyright(c) 2014-2016 Douglas Christopher Wilson
|
|
* MIT Licensed
|
|
*/
|
|
|
|
'use strict'
|
|
|
|
/**
|
|
* Module dependencies.
|
|
* @private
|
|
*/
|
|
|
|
var createError = require('http-errors')
|
|
var debug = require('debug')('send')
|
|
var deprecate = require('depd')('send')
|
|
var destroy = require('destroy')
|
|
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')
|
|
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
|
|
module.exports.mime = mime
|
|
|
|
/**
|
|
* 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._hidden = Boolean(opts.hidden)
|
|
|
|
if (opts.hidden !== undefined) {
|
|
deprecate('hidden: use dotfiles: \'' + (this._hidden ? 'allow' : 'ignore') + '\' instead')
|
|
}
|
|
|
|
// legacy support
|
|
if (opts.dotfiles === undefined) {
|
|
this._dotfiles = undefined
|
|
}
|
|
|
|
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
|
|
|
|
if (!this._root && opts.from) {
|
|
this.from(opts.from)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inherits from `Stream`.
|
|
*/
|
|
|
|
util.inherits(SendStream, Stream)
|
|
|
|
/**
|
|
* Enable or disable etag generation.
|
|
*
|
|
* @param {Boolean} val
|
|
* @return {SendStream}
|
|
* @api public
|
|
*/
|
|
|
|
SendStream.prototype.etag = deprecate.function(function etag (val) {
|
|
this._etag = Boolean(val)
|
|
debug('etag %s', this._etag)
|
|
return this
|
|
}, 'send.etag: pass etag as option')
|
|
|
|
/**
|
|
* Enable or disable "hidden" (dot) files.
|
|
*
|
|
* @param {Boolean} path
|
|
* @return {SendStream}
|
|
* @api public
|
|
*/
|
|
|
|
SendStream.prototype.hidden = deprecate.function(function hidden (val) {
|
|
this._hidden = Boolean(val)
|
|
this._dotfiles = undefined
|
|
debug('hidden %s', this._hidden)
|
|
return this
|
|
}, 'send.hidden: use dotfiles option')
|
|
|
|
/**
|
|
* Set index `paths`, set to a falsy
|
|
* value to disable index support.
|
|
*
|
|
* @param {String|Boolean|Array} paths
|
|
* @return {SendStream}
|
|
* @api public
|
|
*/
|
|
|
|
SendStream.prototype.index = deprecate.function(function index (paths) {
|
|
var index = !paths ? [] : normalizeList(paths, 'paths argument')
|
|
debug('index %o', paths)
|
|
this._index = index
|
|
return this
|
|
}, 'send.index: pass index as option')
|
|
|
|
/**
|
|
* Set root `path`.
|
|
*
|
|
* @param {String} path
|
|
* @return {SendStream}
|
|
* @api public
|
|
*/
|
|
|
|
SendStream.prototype.root = function root (path) {
|
|
this._root = resolve(String(path))
|
|
debug('root %s', this._root)
|
|
return this
|
|
}
|
|
|
|
SendStream.prototype.from = deprecate.function(SendStream.prototype.root,
|
|
'send.from: pass root as option')
|
|
|
|
SendStream.prototype.root = deprecate.function(SendStream.prototype.root,
|
|
'send.root: pass root as option')
|
|
|
|
/**
|
|
* Set max-age to `maxAge`.
|
|
*
|
|
* @param {Number} maxAge
|
|
* @return {SendStream}
|
|
* @api public
|
|
*/
|
|
|
|
SendStream.prototype.maxage = deprecate.function(function maxage (maxAge) {
|
|
this._maxage = typeof maxAge === 'string'
|
|
? ms(maxAge)
|
|
: Number(maxAge)
|
|
this._maxage = !isNaN(this._maxage)
|
|
? Math.min(Math.max(0, this._maxage), MAX_MAXAGE)
|
|
: 0
|
|
debug('max-age %d', this._maxage)
|
|
return this
|
|
}, 'send.maxage: pass maxAge as option')
|
|
|
|
/**
|
|
* 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', createError(status, err, {
|
|
expose: false
|
|
}))
|
|
}
|
|
|
|
var res = this.res
|
|
var msg = statuses[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 content-* header fields.
|
|
*
|
|
* @private
|
|
*/
|
|
|
|
SendStream.prototype.removeContentHeaderFields = function removeContentHeaderFields () {
|
|
var res = this.res
|
|
var headers = getHeaderNames(res)
|
|
|
|
for (var i = 0; i < headers.length; i++) {
|
|
var header = headers[i]
|
|
if (header.substr(0, 8) === 'content-' && header !== 'content-location') {
|
|
res.removeHeader(header)
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 <a href="' + escapeHtml(loc) + '">' +
|
|
escapeHtml(loc) + '</a>')
|
|
|
|
// 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)) {
|
|
var access = this._dotfiles
|
|
|
|
// legacy support
|
|
if (access === undefined) {
|
|
access = parts[parts.length - 1][0] === '.'
|
|
? (this._hidden ? 'allow' : 'ignore')
|
|
: 'allow'
|
|
}
|
|
|
|
debug('%s dotfile "%s"', access, path)
|
|
switch (access) {
|
|
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 (headersSent(res)) {
|
|
// 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) {
|
|
if (err && err.code === 'ENOENT' && !extname(path) && path[path.length - 1] !== sep) {
|
|
// not found, check extensions
|
|
return next(err)
|
|
}
|
|
if (err) return self.onStatError(err)
|
|
if (stat.isDirectory()) return self.redirect(path)
|
|
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) {
|
|
// TODO: this is all lame, refactor meeee
|
|
var finished = false
|
|
var self = this
|
|
var res = this.res
|
|
|
|
// pipe
|
|
var stream = fs.createReadStream(path, options)
|
|
this.emit('stream', stream)
|
|
stream.pipe(res)
|
|
|
|
// response finished, done with the fd
|
|
onFinished(res, function onfinished () {
|
|
finished = true
|
|
destroy(stream)
|
|
})
|
|
|
|
// error handling code-smell
|
|
stream.on('error', function onerror (err) {
|
|
// request already finished
|
|
if (finished) return
|
|
|
|
// clean up stream
|
|
finished = true
|
|
destroy(stream)
|
|
|
|
// 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 type = mime.lookup(path)
|
|
|
|
if (!type) {
|
|
debug('no content-type')
|
|
return
|
|
}
|
|
|
|
var charset = mime.charsets.lookup(type)
|
|
|
|
debug('content-type %s', type)
|
|
res.setHeader('Content-Type', type + (charset ? '; charset=' + charset : ''))
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
var headers = getHeaderNames(res)
|
|
|
|
for (var i = 0; i < headers.length; i++) {
|
|
res.removeHeader(headers[i])
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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'
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the header names on a respnse.
|
|
*
|
|
* @param {object} res
|
|
* @returns {array[string]}
|
|
* @private
|
|
*/
|
|
|
|
function getHeaderNames (res) {
|
|
return typeof res.getHeaderNames !== 'function'
|
|
? Object.keys(res._headers || {})
|
|
: res.getHeaderNames()
|
|
}
|
|
|
|
/**
|
|
* Determine if emitter has listeners of a given type.
|
|
*
|
|
* The way to do this check is done three different ways in Node.js >= 0.8
|
|
* 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
|
|
}
|
|
|
|
/**
|
|
* Determine if the response headers have been sent.
|
|
*
|
|
* @param {object} res
|
|
* @returns {boolean}
|
|
* @private
|
|
*/
|
|
|
|
function headersSent (res) {
|
|
return typeof res.headersSent !== 'boolean'
|
|
? Boolean(res._header)
|
|
: res.headersSent
|
|
}
|
|
|
|
/**
|
|
* 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])
|
|
}
|
|
}
|