lib/cookies.js

   1 /*******************************************************
   2 COOKIE FUNCTIONALITY
   3 Based on "Night of the Living Cookie" by Bill Dortch
   4 (c) 2003, Ryan Parman
   5 http://www.skyzyx.com
   6 Distributed according to SkyGPL 2.1, http://www.skyzyx.com/license/
   7 *******************************************************/
   8 function cookie(name, value, expires, path, domain, secure)
   9 {
  10         // Passed Values
  11         this.name=name;
  12         this.value=value;
  13         this.expires=expires;
  14         this.path=path;
  15         this.domain=domain;
  16         this.secure=secure;
  17
  18         // Read cookie
  19         this.read=function()
  20         {
  21                 // To allow for faster parsing
  22                 var ck=document.cookie;
  23
  24                 var arg = this.name + "=";
  25                 var alen = arg.length;
  26                 var clen = ck.length;
  27                 var i = 0;
  28
  29                 while (i < clen)
  30                 {
  31                         var j = i + alen;
  32                         if (ck.substring(i, j) == arg)
  33                         {
  34                                 var endstr = ck.indexOf (";", j);
  35                                 if (endstr == -1) endstr = ck.length;
  36                                 return unescape(ck.substring(j, endstr));
  37                         }
  38                         i = ck.indexOf(" ", i) + 1;
  39                         if (i == 0) break;
  40                 }
  41                 return null;
  42         }
  43
  44         // Set cookie
  45         this.set=function()
  46         {
  47                 // Store initial value of "this.expires" for re-initialization.
  48                 expStore=this.expires;
  49
  50                 // Set time to absolute zero.
  51                 exp = new Date();
  52                 base = new Date(0);
  53                 skew = base.getTime();
  54                 if (skew > 0)  exp.setTime (exp.getTime() - skew);
  55                 exp.setTime(exp.getTime() + (this.expires*24*60*60*1000));
  56                 this.expires=exp;
  57
  58                 document.cookie = this.name + "=" + escape (this.value) +
  59                                 ((this.expires) ? "; expires=" + this.expires.toGMTString() : "") +
  60                                 ((this.path) ? "; path=" + this.path : "") +
  61                                 ((this.domain) ? "; domain=" + this.domain : "") +
  62                                 ((this.secure) ? "; secure" : "");
  63
  64                 // Re-initialize
  65                 this.expires=expStore;
  66         }
  67
  68         // Kill cookie
  69         this.kill=function()
  70         {
  71                 document.cookie = this.name + "=" +
  72                                 ((this.path) ? "; path=" + this.path : "") +
  73                                 ((this.domain) ? "; domain=" + this.domain : "") +
  74                                 "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  75         }
  76
  77         // Change cookie settings.
  78         this.changeName=function(chName) { this.kill(); this.name=chName; this.set(); }
  79         this.changeVal=function(chVal) { this.kill(); this.value=chVal; this.set(); }
  80         this.changeExp=function(chExp) { this.kill(); this.expires=chExp; this.set(); }
  81         this.changePath=function(chPath) { this.kill(); this.path=chPath; this.set(); }
  82         this.changeDomain=function(chDom) { this.kill(); this.domain=chDom; this.set(); }
  83         this.changeSecurity=function(chSec) { this.kill(); this.secure=chSec; this.set(); }
  84 }