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/*!
* 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 decode = decodeURIComponent;
var encode = encodeURIComponent;
var pairSplitRegExp = /; */;
/**
* 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 pairs = str.split(pairSplitRegExp);
var dec = opt.decode || decode;
for (var i = 0; i < pairs.length; i++) {
var pair = pairs[i];
var eq_idx = pair.indexOf('=');
// skip things that don't look like key=value
if (eq_idx < 0) {
continue;
}
var key = pair.substr(0, eq_idx).trim()
var val = pair.substr(++eq_idx, pair.length).trim();
// quoted values
if ('"' == val[0]) {
val = val.slice(1, -1);
}
// only assign once
if (undefined == obj[key]) {
obj[key] = tryDecode(val, dec);
}
}
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)) throw new Error('maxAge should be a Number');
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) {
if (typeof opt.expires.toUTCString !== 'function') {
throw new TypeError('option expires is invalid');
}
str += '; Expires=' + opt.expires.toUTCString();
}
if (opt.httpOnly) {
str += '; HttpOnly';
}
if (opt.secure) {
str += '; Secure';
}
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;
default:
throw new TypeError('option sameSite is invalid');
}
}
return str;
}
/**
* 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;
}
}
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