Constnium/node_modules/cookie/index.js
2022-06-22 19:20:40 +02:00

270 lines
5.1 KiB
JavaScript

/*!
* cookie
* Copyright(c) 2012-2014 Roman Shtylman
* Copyright(c) 2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module exports.
* @public
*/
exports.parse = parse;
exports.serialize = serialize;
/**
* Module variables.
* @private
*/
var __toString = Object.prototype.toString
/**
* 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]+$/;
/**
* Parse a cookie header.
*
* Parse the given cookie header string into an object
* The object has the various cookies as keys(names) => values
*
* @param {string} str
* @param {object} [options]
* @return {object}
* @public
*/
function parse(str, options) {
if (typeof str !== 'string') {
throw new TypeError('argument str must be a string');
}
var obj = {}
var opt = options || {};
var dec = opt.decode || decode;
var index = 0
while (index < str.length) {
var eqIdx = str.indexOf('=', index)
// no more cookie pairs
if (eqIdx === -1) {
break
}
var endIdx = str.indexOf(';', index)
if (endIdx === -1) {
endIdx = str.length
} else if (endIdx < eqIdx) {
// backtrack on prior semicolon
index = str.lastIndexOf(';', eqIdx - 1) + 1
continue
}
var key = str.slice(index, eqIdx).trim()
// only assign once
if (undefined === obj[key]) {
var val = str.slice(eqIdx + 1, endIdx).trim()
// quoted values
if (val.charCodeAt(0) === 0x22) {
val = val.slice(1, -1)
}
obj[key] = tryDecode(val, dec);
}
index = endIdx + 1
}
return obj;
}
/**
* Serialize data into a cookie header.
*
* Serialize the a name value pair into a cookie string suitable for
* http headers. An optional options object specified cookie parameters.
*
* serialize('foo', 'bar', { httpOnly: true })
* => "foo=bar; httpOnly"
*
* @param {string} name
* @param {string} val
* @param {object} [options]
* @return {string}
* @public
*/
function serialize(name, val, options) {
var opt = options || {};
var enc = opt.encode || encode;
if (typeof enc !== 'function') {
throw new TypeError('option encode is invalid');
}
if (!fieldContentRegExp.test(name)) {
throw new TypeError('argument name is invalid');
}
var value = enc(val);
if (value && !fieldContentRegExp.test(value)) {
throw new TypeError('argument val is invalid');
}
var str = name + '=' + value;
if (null != opt.maxAge) {
var maxAge = opt.maxAge - 0;
if (isNaN(maxAge) || !isFinite(maxAge)) {
throw new TypeError('option maxAge is invalid')
}
str += '; Max-Age=' + Math.floor(maxAge);
}
if (opt.domain) {
if (!fieldContentRegExp.test(opt.domain)) {
throw new TypeError('option domain is invalid');
}
str += '; Domain=' + opt.domain;
}
if (opt.path) {
if (!fieldContentRegExp.test(opt.path)) {
throw new TypeError('option path is invalid');
}
str += '; Path=' + opt.path;
}
if (opt.expires) {
var expires = opt.expires
if (!isDate(expires) || isNaN(expires.valueOf())) {
throw new TypeError('option expires is invalid');
}
str += '; Expires=' + expires.toUTCString()
}
if (opt.httpOnly) {
str += '; HttpOnly';
}
if (opt.secure) {
str += '; Secure';
}
if (opt.priority) {
var priority = typeof opt.priority === 'string'
? opt.priority.toLowerCase()
: opt.priority
switch (priority) {
case 'low':
str += '; Priority=Low'
break
case 'medium':
str += '; Priority=Medium'
break
case 'high':
str += '; Priority=High'
break
default:
throw new TypeError('option priority is invalid')
}
}
if (opt.sameSite) {
var sameSite = typeof opt.sameSite === 'string'
? opt.sameSite.toLowerCase() : opt.sameSite;
switch (sameSite) {
case true:
str += '; SameSite=Strict';
break;
case 'lax':
str += '; SameSite=Lax';
break;
case 'strict':
str += '; SameSite=Strict';
break;
case 'none':
str += '; SameSite=None';
break;
default:
throw new TypeError('option sameSite is invalid');
}
}
return str;
}
/**
* URL-decode string value. Optimized to skip native call when no %.
*
* @param {string} str
* @returns {string}
*/
function decode (str) {
return str.indexOf('%') !== -1
? decodeURIComponent(str)
: str
}
/**
* URL-encode value.
*
* @param {string} str
* @returns {string}
*/
function encode (val) {
return encodeURIComponent(val)
}
/**
* Determine if value is a Date.
*
* @param {*} val
* @private
*/
function isDate (val) {
return __toString.call(val) === '[object Date]' ||
val instanceof Date
}
/**
* Try decoding a string using a decoding function.
*
* @param {string} str
* @param {function} decode
* @private
*/
function tryDecode(str, decode) {
try {
return decode(str);
} catch (e) {
return str;
}
}