https://dottorati.uniroma2.it/js-frontend/jquery-session/jquery.session.js

1(function($){
2
3    $.session = {
4
5        _id: null,
6
7        _cookieCache: undefined,
8
9        _init: function()
10        {
11            if (!window.name) {
12                window.name = Math.random();
13            }
14            this._id = window.name;
15            this._initCache();
16
17            // See if we've changed protcols
18
19            var matches = (new RegExp(this._generatePrefix() + "=([^;]+);")).exec(document.cookie);
20            if (matches && document.location.protocol !== matches[1]) {
21               this._clearSession();
22               for (var key in this._cookieCache) {
23                   try {
24                   window.sessionStorage.setItem(key, this._cookieCache[key]);
25                   } catch (e) {};
26               }
27            }
28
29            document.cookie = this._generatePrefix() + "=" + document.location.protocol + ';path=/;expires=' + (new Date((new Date).getTime() + 120000)).toUTCString();
30
31        },
32
33        _generatePrefix: function()
34        {
35            return '__session:' + this._id + ':';
36        },
37
38        _initCache: function()
39        {
40            var cookies = document.cookie.split(';');
41            this._cookieCache = {};
42            for (var i in cookies) {
43                var kv = cookies[i].split('=');
44                if ((new RegExp(this._generatePrefix() + '.+')).test(kv[0]) && kv[1]) {
45                    this._cookieCache[kv[0].split(':', 3)[2]] = kv[1];
46                }
47            }
48        },
49
50        _setFallback: function(key, value, onceOnly)
51        {
52            var cookie = this._generatePrefix() + key + "=" + value + "; path=/";
53            if (onceOnly) {
54                cookie += "; expires=" + (new Date(Date.now() + 120000)).toUTCString();
55            }
56            document.cookie = cookie;
57            this._cookieCache[key] = value;
58            return this;
59        },
60
61        _getFallback: function(key)
62        {
63            if (!this._cookieCache) {
64                this._initCache();
65            }
66            return this._cookieCache[key];
67        },
68
69        _clearFallback: function()
70        {
71            for (var i in this._cookieCache) {
72                document.cookie = this._generatePrefix() + i + '=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
73            }
74            this._cookieCache = {};
75        },
76
77        _deleteFallback: function(key)
78        {
79            document.cookie = this._generatePrefix() + key + '=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
80            delete this._cookieCache[key];
81        },
82
83        get: function(key)
84        {
85            return window.sessionStorage.getItem(key) || this._getFallback(key);
86        },
87
88        set: function(key, value, onceOnly)
89        {
90            try {
91                window.sessionStorage.setItem(key, value);
92            } catch (e) {}
93            this._setFallback(key, value, onceOnly || false);
94            return this;
95        },
96        
97        'delete': function(key){
98            return this.remove(key);
99        },
100
101        remove: function(key)
102        {
103            try {
104            window.sessionStorage.removeItem(key);
105            } catch (e) {};
106            this._deleteFallback(key);
107            return this;
108        },
109
110        _clearSession: function()
111        {
112          try {
113                window.sessionStorage.clear();
114            } catch (e) {
115                for (var i in window.sessionStorage) {
116                    window.sessionStorage.removeItem(i);
117                }
118            }
119        },
120
121        clear: function()
122        {
123            this._clearSession();
124            this._clearFallback();
125            return this;
126        }
127
128    };
129
130    $.session._init();
131
132})(jQuery);