1
 2/// Serialize the a name value pair into a cookie string suitable for
 3/// http headers. An optional options object specified cookie parameters
 4///
 5/// serialize('foo', 'bar', { httpOnly: true })
 6///   => "foo=bar; httpOnly"
 7///
 8/// @param {String} name
 9/// @param {String} val
10/// @param {Object} options
11/// @return {String}
12var serialize = function(name, val, opt){
13    opt = opt || {};
14    var enc = opt.encode || encode;
15    var pairs = [name + '=' + enc(val)];
16
17    if (null != opt.maxAge) {
18        var maxAge = opt.maxAge - 0;
19        if (isNaN(maxAge)) throw new Error('maxAge should be a Number');
20        pairs.push('Max-Age=' + maxAge);
21    }
22
23    if (opt.domain) pairs.push('Domain=' + opt.domain);
24    if (opt.path) pairs.push('Path=' + opt.path);
25    if (opt.expires) pairs.push('Expires=' + opt.expires.toUTCString());
26    if (opt.httpOnly) pairs.push('HttpOnly');
27    if (opt.secure) pairs.push('Secure');
28
29    return pairs.join('; ');
30};
31
32/// Parse the given cookie header string into an object
33/// The object has the various cookies as keys(names) => values
34/// @param {String} str
35/// @return {Object}
36var parse = function(str, opt) {
37    opt = opt || {};
38    var obj = {}
39    var pairs = str.split(/; */);
40    var dec = opt.decode || decode;
41
42    pairs.forEach(function(pair) {
43        var eq_idx = pair.indexOf('=')
44
45        // skip things that don't look like key=value
46        if (eq_idx < 0) {
47            return;
48        }
49
50        var key = pair.substr(0, eq_idx).trim()
51        var val = pair.substr(++eq_idx, pair.length).trim();
52
53        // quoted values
54        if ('"' == val[0]) {
55            val = val.slice(1, -1);
56        }
57
58        // only assign once
59        if (undefined == obj[key]) {
60            try {
61                obj[key] = dec(val);
62            } catch (e) {
63                obj[key] = val;
64            }
65        }
66    });
67
68    return obj;
69};
70
71var encode = encodeURIComponent;
72var decode = decodeURIComponent;
73
74module.exports.serialize = serialize;
75module.exports.parse = parse;