lib/dojo/cookie.js

   1 /*
   2         Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
   3         Available via Academic Free License >= 2.1 OR the modified BSD license.
   4         see: http://dojotoolkit.org/license for details
   5 */
   6
   7
   8 if(!dojo._hasResource["dojo.cookie"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   9 dojo._hasResource["dojo.cookie"] = true;
  10 dojo.provide("dojo.cookie");
  11
  12 dojo.require("dojo.regexp");
  13
  14 /*=====
  15 dojo.__cookieProps = function(){
  16         //      expires: Date|String|Number?
  17         //              If a number, the number of days from today at which the cookie
  18         //              will expire. If a date, the date past which the cookie will expire.
  19         //              If expires is in the past, the cookie will be deleted.
  20         //              If expires is omitted or is 0, the cookie will expire when the browser closes. << FIXME: 0 seems to disappear right away? FF3.
  21         //      path: String?
  22         //              The path to use for the cookie.
  23         //      domain: String?
  24         //              The domain to use for the cookie.
  25         //      secure: Boolean?
  26         //              Whether to only send the cookie on secure connections
  27         this.expires = expires;
  28         this.path = path;
  29         this.domain = domain;
  30         this.secure = secure;
  31 }
  32 =====*/
  33
  34
  35 dojo.cookie = function(/*String*/name, /*String?*/value, /*dojo.__cookieProps?*/props){
  36         //      summary:
  37         //              Get or set a cookie.
  38         //      description:
  39         //              If one argument is passed, returns the value of the cookie
  40         //              For two or more arguments, acts as a setter.
  41         //      name:
  42         //              Name of the cookie
  43         //      value:
  44         //              Value for the cookie
  45         //      props:
  46         //              Properties for the cookie
  47         //      example:
  48         //              set a cookie with the JSON-serialized contents of an object which
  49         //              will expire 5 days from now:
  50         //      |       dojo.cookie("configObj", dojo.toJson(config), { expires: 5 });
  51         //
  52         //      example:
  53         //              de-serialize a cookie back into a JavaScript object:
  54         //      |       var config = dojo.fromJson(dojo.cookie("configObj"));
  55         //
  56         //      example:
  57         //              delete a cookie:
  58         //      |       dojo.cookie("configObj", null, {expires: -1});
  59         var c = document.cookie;
  60         if(arguments.length == 1){
  61                 var matches = c.match(new RegExp("(?:^|; )" + dojo.regexp.escapeString(name) + "=([^;]*)"));
  62                 return matches ? decodeURIComponent(matches[1]) : undefined; // String or undefined
  63         }else{
  64                 props = props || {};
  65 // FIXME: expires=0 seems to disappear right away, not on close? (FF3)  Change docs?
  66                 var exp = props.expires;
  67                 if(typeof exp == "number"){
  68                         var d = new Date();
  69                         d.setTime(d.getTime() + exp*24*60*60*1000);
  70                         exp = props.expires = d;
  71                 }
  72                 if(exp && exp.toUTCString){ props.expires = exp.toUTCString(); }
  73
  74                 value = encodeURIComponent(value);
  75                 var updatedCookie = name + "=" + value, propName;
  76                 for(propName in props){
  77                         updatedCookie += "; " + propName;
  78                         var propValue = props[propName];
  79                         if(propValue !== true){ updatedCookie += "=" + propValue; }
  80                 }
  81                 document.cookie = updatedCookie;
  82         }
  83 };
  84
  85 dojo.cookie.isSupported = function(){
  86         //      summary:
  87         //              Use to determine if the current browser supports cookies or not.
  88         //
  89         //              Returns true if user allows cookies.
  90         //              Returns false if user doesn't allow cookies.
  91
  92         if(!("cookieEnabled" in navigator)){
  93                 this("__djCookieTest__", "CookiesAllowed");
  94                 navigator.cookieEnabled = this("__djCookieTest__") == "CookiesAllowed";
  95                 if(navigator.cookieEnabled){
  96                         this("__djCookieTest__", "", {expires: -1});
  97                 }
  98         }
  99         return navigator.cookieEnabled;
 100 };
 101
 102 }