Cookies.js
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/**
* Utility class for setting/reading values from browser cookies.
* Values can be written using the {@link #set} method.
* Values can be read using the {@link #get} method.
* A cookie can be invalidated on the client machine using the {@link #clear} method.
*/
Ext.define('Ext.util.Cookies', {
singleton: true,
/**
* Creates a cookie with the specified name and value. Additional settings for the cookie may be optionally specified
* (for example: expiration, access restriction, SSL).
* @param {String} name The name of the cookie to set.
* @param {Object} value The value to set for the cookie.
* @param {Object} [expires] Specify an expiration date the cookie is to persist until. Note that the specified Date
* object will be converted to Greenwich Mean Time (GMT).
* @param {String} [path] Setting a path on the cookie restricts access to pages that match that path. Defaults to all
* pages ('/').
* @param {String} [domain] Setting a domain restricts access to pages on a given domain (typically used to allow
* cookie access across subdomains). For example, "sencha.com" will create a cookie that can be accessed from any
* subdomain of sencha.com, including www.sencha.com, support.sencha.com, etc.
* @param {Boolean} [secure] Specify true to indicate that the cookie should only be accessible via SSL on a page
* using the HTTPS protocol. Defaults to false. Note that this will only work if the page calling this code uses the
* HTTPS protocol, otherwise the cookie will be created with default options.
*/
set : function(name, value){
var argv = arguments,
argc = arguments.length,
expires = (argc > 2) ? argv[2] : null,
path = (argc > 3) ? argv[3] : '/',
domain = (argc > 4) ? argv[4] : null,
secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape(value) + ((expires === null) ? "" : ("; expires=" + expires.toGMTString())) + ((path === null) ? "" : ("; path=" + path)) + ((domain === null) ? "" : ("; domain=" + domain)) + ((secure === true) ? "; secure" : "");
},
/**
* Retrieves cookies that are accessible by the current page. If a cookie does not exist, `get()` returns null. The
* following example retrieves the cookie called "valid" and stores the String value in the variable validStatus.
*
* var validStatus = Ext.util.Cookies.get("valid");
*
* @param {String} name The name of the cookie to get
* @return {Object} Returns the cookie value for the specified name;
* null if the cookie name does not exist.
*/
get : function(name){
var arg = name + "=",
alen = arg.length,
clen = document.cookie.length,
i = 0,
j = 0;
while(i < clen){
j = i + alen;
if(document.cookie.substring(i, j) == arg){
return this.getCookieVal(j);
}
i = document.cookie.indexOf(" ", i) + 1;
if(i === 0){
break;
}
}
return null;
},
/**
* Removes a cookie with the provided name from the browser
* if found by setting its expiration date to sometime in the past.
* @param {String} name The name of the cookie to remove
* @param {String} [path] The path for the cookie.
* This must be included if you included a path while setting the cookie.
*/
clear : function(name, path){
if(this.get(name)){
path = path || '/';
document.cookie = name + '=' + '; expires=Thu, 01-Jan-70 00:00:01 GMT; path=' + path;
}
},
/**
* @private
*/
getCookieVal : function(offset){
var endstr = document.cookie.indexOf(";", offset);
if(endstr == -1){
endstr = document.cookie.length;
}
return unescape(document.cookie.substring(offset, endstr));
}
});