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index.js
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index.js
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/*!
* cookies
* Copyright(c) 2014 Jed Schmidt, http://jed.is/
* Copyright(c) 2015-2016 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
var deprecate = require('depd')('cookies')
var Keygrip = require('keygrip')
var http = require('http')
/**
* RegExp to match field-content in RFC 7230 sec 3.2
*
* field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
* field-vchar = VCHAR / obs-text
* obs-text = %x80-FF
*/
var fieldContentRegExp = /^[\u0009\u0020-\u007e\u0080-\u00ff]+$/;
/**
* RegExp to match Priority cookie attribute value.
*/
var PRIORITY_REGEXP = /^(?:low|medium|high)$/i
/**
* Cache for generated name regular expressions.
*/
var REGEXP_CACHE = Object.create(null)
/**
* RegExp to match all characters to escape in a RegExp.
*/
var REGEXP_ESCAPE_CHARS_REGEXP = /[\^$\\.*+?()[\]{}|]/g
/**
* RegExp to match basic restricted name characters for loose validation.
*/
var RESTRICTED_NAME_CHARS_REGEXP = /[;=]/
/**
* RegExp to match basic restricted value characters for loose validation.
*/
var RESTRICTED_VALUE_CHARS_REGEXP = /[;]/
/**
* RegExp to match Same-Site cookie attribute value.
*/
var SAME_SITE_REGEXP = /^(?:lax|none|strict)$/i
function Cookies(request, response, options) {
if (!(this instanceof Cookies)) return new Cookies(request, response, options)
this.secure = undefined
this.request = request
this.response = response
if (options) {
if (Array.isArray(options)) {
// array of key strings
deprecate('"keys" argument; provide using options {"keys": [...]}')
this.keys = new Keygrip(options)
} else if (options.constructor && options.constructor.name === 'Keygrip') {
// any keygrip constructor to allow different versions
deprecate('"keys" argument; provide using options {"keys": keygrip}')
this.keys = options
} else {
this.keys = Array.isArray(options.keys) ? new Keygrip(options.keys) : options.keys
this.secure = options.secure
}
}
}
Cookies.prototype.get = function(name, opts) {
var sigName = name + ".sig"
, header, match, value, remote, data, index
, signed = opts && opts.signed !== undefined ? opts.signed : !!this.keys
header = this.request.headers["cookie"]
if (!header) return
match = header.match(getPattern(name))
if (!match) return
value = match[1]
if (value[0] === '"') value = value.slice(1, -1)
if (!opts || !signed) return value
remote = this.get(sigName)
if (!remote) return
data = name + "=" + value
if (!this.keys) throw new Error('.keys required for signed cookies');
index = this.keys.index(data, remote)
if (index < 0) {
this.set(sigName, null, {path: "/", signed: false })
} else {
index && this.set(sigName, this.keys.sign(data), { signed: false })
return value
}
};
Cookies.prototype.set = function(name, value, opts) {
var res = this.response
, req = this.request
, headers = res.getHeader("Set-Cookie") || []
, cookie = new Cookie(name, value, opts)
, signed = opts && opts.signed !== undefined ? opts.signed : !!this.keys
var secure = this.secure === undefined
? req.protocol === 'https' || isRequestEncrypted(req)
: Boolean(this.secure)
if (typeof headers == "string") headers = [headers]
if (!secure && opts && opts.secure) {
throw new Error('Cannot send secure cookie over unencrypted connection')
}
cookie.secure = opts && opts.secure !== undefined
? opts.secure
: secure
if (opts && "secureProxy" in opts) {
deprecate('"secureProxy" option; use "secure" option, provide "secure" to constructor if needed')
cookie.secure = opts.secureProxy
}
pushCookie(headers, cookie)
if (opts && signed) {
if (!this.keys) throw new Error('.keys required for signed cookies');
cookie.value = this.keys.sign(cookie.toString())
cookie.name += ".sig"
pushCookie(headers, cookie)
}
var setHeader = res.set ? http.OutgoingMessage.prototype.setHeader : res.setHeader
setHeader.call(res, 'Set-Cookie', headers)
return this
};
function Cookie(name, value, attrs) {
if (!fieldContentRegExp.test(name) || RESTRICTED_NAME_CHARS_REGEXP.test(name)) {
throw new TypeError('argument name is invalid');
}
if (value && (!fieldContentRegExp.test(value) || RESTRICTED_VALUE_CHARS_REGEXP.test(value))) {
throw new TypeError('argument value is invalid');
}
this.name = name
this.value = value || ""
for (var name in attrs) {
this[name] = attrs[name]
}
if (!this.value) {
this.expires = new Date(0)
this.maxAge = null
}
if (this.path && !fieldContentRegExp.test(this.path)) {
throw new TypeError('option path is invalid');
}
if (this.domain && !fieldContentRegExp.test(this.domain)) {
throw new TypeError('option domain is invalid');
}
if (typeof this.maxAge === 'number' ? (isNaN(this.maxAge) || !isFinite(this.maxAge)) : this.maxAge) {
throw new TypeError('option maxAge is invalid')
}
if (this.priority && !PRIORITY_REGEXP.test(this.priority)) {
throw new TypeError('option priority is invalid')
}
if (this.sameSite && this.sameSite !== true && !SAME_SITE_REGEXP.test(this.sameSite)) {
throw new TypeError('option sameSite is invalid')
}
}
Cookie.prototype.path = "/";
Cookie.prototype.expires = undefined;
Cookie.prototype.domain = undefined;
Cookie.prototype.httpOnly = true;
Cookie.prototype.partitioned = false
Cookie.prototype.priority = undefined
Cookie.prototype.sameSite = false;
Cookie.prototype.secure = false;
Cookie.prototype.overwrite = false;
Cookie.prototype.toString = function() {
return this.name + "=" + this.value
};
Cookie.prototype.toHeader = function() {
var header = this.toString()
if (this.maxAge) this.expires = new Date(Date.now() + this.maxAge);
if (this.path ) header += "; path=" + this.path
if (this.expires ) header += "; expires=" + this.expires.toUTCString()
if (this.domain ) header += "; domain=" + this.domain
if (this.priority ) header += "; priority=" + this.priority.toLowerCase()
if (this.sameSite ) header += "; samesite=" + (this.sameSite === true ? 'strict' : this.sameSite.toLowerCase())
if (this.secure ) header += "; secure"
if (this.httpOnly ) header += "; httponly"
if (this.partitioned) header += '; partitioned'
return header
};
// back-compat so maxage mirrors maxAge
Object.defineProperty(Cookie.prototype, 'maxage', {
configurable: true,
enumerable: true,
get: function () { return this.maxAge },
set: function (val) { return this.maxAge = val }
});
deprecate.property(Cookie.prototype, 'maxage', '"maxage"; use "maxAge" instead')
/**
* Get the pattern to search for a cookie in a string.
* @param {string} name
* @private
*/
function getPattern (name) {
if (!REGEXP_CACHE[name]) {
REGEXP_CACHE[name] = new RegExp(
'(?:^|;) *' +
name.replace(REGEXP_ESCAPE_CHARS_REGEXP, '\\$&') +
'=([^;]*)'
)
}
return REGEXP_CACHE[name]
}
/**
* Get the encrypted status for a request.
*
* @param {object} req
* @return {string}
* @private
*/
function isRequestEncrypted (req) {
return req.socket
? req.socket.encrypted
: req.connection.encrypted
}
function pushCookie(headers, cookie) {
if (cookie.overwrite) {
for (var i = headers.length - 1; i >= 0; i--) {
if (headers[i].indexOf(cookie.name + '=') === 0) {
headers.splice(i, 1)
}
}
}
headers.push(cookie.toHeader())
}
Cookies.connect = Cookies.express = function(keys) {
return function(req, res, next) {
req.cookies = res.cookies = new Cookies(req, res, {
keys: keys
})
next()
}
}
Cookies.Cookie = Cookie
module.exports = Cookies